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Therefore, the names of ``virtual_organization``, ``logical_library`` and ``storage_class`` have to be defined by admin in advance before any file can be written. + +Additonally CTA has a concept of ``tape_pool`` that represents logical grouping +of tapes. Each tape belongs to exactly one tape pool. Tape pools are used to keep data belonging to different VOs, storage_class (via ``archive_route``). + +The ``archive_route`` table connects ``storage_class`` to ``tape_pool`` and specifies how many copies a file must have. + +File table +---------- + +CTA separates the concept of `file` into an abstract ``archive_file`` that may +have multiple corresponding ``tape_file`` entries. The ``archive_file`` table stores file size; adler32 checksum; dis instance name; ``disk_file_id`` - an inode number on storage front end; unique file id (``archive_file_id``); user UID/GID and a deleted flag. + +A ``tape_file`` references ``archive_file`` and contains infromation that ties it to the tape - like volume id (``vid``); location on the tape and copy number. + +Storage class table +------------------- + +The storage class concept is somewhat similar to file family concept of Enstore. Besides unique name ``stotrage_class_name`` it specifies how many copes a file must have. And it has a reference to ``virtual_orhanization``. diff --git a/_sources/dcache_locations.rst.txt b/_sources/dcache_locations.rst.txt new file mode 100644 index 0000000..af3dbc9 --- /dev/null +++ b/_sources/dcache_locations.rst.txt @@ -0,0 +1,9 @@ +dCache location +=============== + +dCache needs to know location of files in CTA. It is done by utilizing URI location style and looks like:: + + cta://cta/?archive_id= + +When running migration, for each file in `archive_file` these locations are +back-filled into existing chimera database. diff --git a/_sources/dcache_setup.rst.txt b/_sources/dcache_setup.rst.txt new file mode 100644 index 0000000..d31b9ec --- /dev/null +++ b/_sources/dcache_setup.rst.txt @@ -0,0 +1,46 @@ +dCache setup with CTA +===================== + + +Pool +---- + +Deploy dcache-cta driver on pool node:: + + wget https://download.dcache.org/nexus/repository/dcache-cta/dcache-cta-0.8.0-1.noarch.rpm + rpm -Uvh --force dcache-cta-0.8.0-1.noarch.rpm + + +Define hsm on pool:: + + hsm create cta cta dcache-cta -cta-user=adm -cta-group=eosusers -cta-instance-name=eosdev -cta-frontend-addr=ctahost:17017 -io-port=1094 + +Each pool on the pool node has to havea dedicated port. + +Define queue on pool:: + + queue define class cta * -pending=100 -total=1 -expire=7200 -open=true + +CTA +--- + +On CTA end define storage class and archive route:: + + cta-admin sc add -n test.cta@cta -c 1 --vo vo -m dcachetest + cta-admin ar add -s test.cta@cta -c 1 -t ctasystest -m dcachetest + +PoolManager +----------- + +In PoolManager define example dedicated CTA pool group:: + + psu create unit -store test.cta@cta + psu create ugroup CtaSelGrp + psu addto ugroup CtaSelGrp test.cta@cta + + psu create pgroup CtaPoolGroup + psu addto pgroup CtaPoolGroup rw-stkendca28a-1 + + psu create link CtaLink CtaSelGrp any-protocol world-net + psu set link CtaLink -readpref=10 -writepref=10 -cachepref=10 -section=default + psu addto link CtaLink CtaPoolGroup diff --git a/_sources/dcache_sfa.rst.txt b/_sources/dcache_sfa.rst.txt new file mode 100644 index 0000000..15f6653 --- /dev/null +++ b/_sources/dcache_sfa.rst.txt @@ -0,0 +1,29 @@ +SFA files +========= + +One of the issues that has been identified - CTA does not have +functinality corresponding to Enstore SFA (Small File Aggregation). +In the nutsheed SFA system is and extension of Enstore system that +managed intermediate disk storage in the side (intermediate between +dCache and Enstore). Depending on policies based on ``file_family``, +``storage_group``, ``library`` and file sizd Enstore directs files +to the intermediate storage for subsequent perioding packaging - tarring +the small files into large package files that then are written to +tape more efficiently. + +The child/parent relation is captured in the same ``file`` table by +setting child's ``file.package_id`` to be equal of BFID of the package file. + +To read SFA files in dCache/CTA setup this relation has to translate in +chimera. + +There is a solution for it, used by similat to SFA, SAPPHIRE system by dCache. +We need to translate:: + + child_pnfsid, package_pnfsid -> + -> dcache://dcache/?store=vo&group=file_family&bfid={child_pnfsid}:package_pnfsid + +I.e. the child/package relation exists as location in ``t_locationinfo`` Chimera +table. + +This can be populated out of band. diff --git a/_sources/enstore2cta_config.rst.txt b/_sources/enstore2cta_config.rst.txt new file mode 100644 index 0000000..147737f --- /dev/null +++ b/_sources/enstore2cta_config.rst.txt @@ -0,0 +1,7 @@ + +Configuration +-------------- + +Script expects configuration file ``enstore2cta.yaml`` in the current directory or pointed to by environment variable ``MIGRATION_CONFIG``. The yaml file has to have "0600" permission bits and has to have the following parameters defned: + +.. literalinclude:: ../etc/enstore2cta.yaml diff --git a/_sources/enstore2cta_mapping.rst.txt b/_sources/enstore2cta_mapping.rst.txt new file mode 100644 index 0000000..6bdecb2 --- /dev/null +++ b/_sources/enstore2cta_mapping.rst.txt @@ -0,0 +1,36 @@ +Enstore to CTA mapping +====================== + +.. list-table:: Enstore to CTA mapping + :header-rows: 1 + + * - Enstore + - CTA + - Comment + * - ``volume.label`` + - ``vid = volume.label[:6]`` + - + * - ``volume.storage_group`` + - ``virtual_organization_name`` + - + * - | ``volume.storage_group`` + | ``volume.file_family`` + - ``storage_class.storage_class_name=volume.storage_group+"."+volume.file_family+"@cta"`` + - | This is needed so that dCache can + | communicate to CTA and still use ``storage_class`` + | for data steering within dCache. + * - ``volume.library`` + - ``logical_library_name`` + - + * - ``file.bfid`` + - ``archive_file.archive_file_id`` + - Sequence in CTA + * - ``file.pnfs_id`` + - ``archive_file.disk_file_id`` + - + * - | if bfid has entry in + | ``file_copies_map`` + - | ``storage_class.nb_copies`` + | ``archive_route.copy_nb`` + | And extra entries in ``tape_file`` + - diff --git a/_sources/enstore2cta_script.rst.txt b/_sources/enstore2cta_script.rst.txt new file mode 100644 index 0000000..de4c5fe --- /dev/null +++ b/_sources/enstore2cta_script.rst.txt @@ -0,0 +1,62 @@ +enstore2cta - Enstore to CTA migration script +============================================= + +The script ``enstore2cta.py``, located in ``enstore2cta/scripts``, implements +database migration from Enstore DB tro CTA DB. Both databases must be +`PostgreSQL` databases. The script has various steering options (see below). +It spawns multuiple processes, each process processing a unique Enstore volume. + + +Requirements +------------ + + +The scrit works both with python2 and python3 and requires ``psycopg2`` module be installed (using ``pip`` or ``yum install python-psycopg2``). + + +Invocation +---------- +To run the script a config file ``enstore2cta.yaml`` *must* exist in +the current directory or be pointed at by ``MIGRATION_CONFIG`` environment variable. +Look for example in ``enstore2cta/etc``. It must have "0600" permission (to protect database passwords if any). + +:: + + $ python enstore2cta.py + usage: enstore2cta.py [-h] [--label LABEL] [--all] [--skip_locations] [--add] + [--storage_class STORAGE_CLASS] [--vo VO] + [--cpu_count CPU_COUNT] + + This script converts Enstore metadata to CTA metadata. It looks for YAML + configuration file pointed to by MIGRATION_CONFIG environment variable or, if + it is not defined, it looks for file enstore2cta.yaml in current directory. + Script will quit if configuration YAML is not found. + + optional arguments: + -h, --help show this help message and exit + --label LABEL comma separated list of labels (default: None) + --all do all labels (default: False) + --skip_locations skip filling chimera locations (good for testing) + (default: False) + --add add volume(s) to existing system, do not create vos, + pools, archive_routes etc. These need to pre-exist in + CTA db (default: False) + --storage_class STORAGE_CLASS + Add storage class corresponding to volume. Needed when + adding single volume to existing system using --add + option (default: None) + --vo VO vo corresponding to storage_class. Needed when adding + single volume to existing system using --add option + (default: None) + --cpu_count CPU_COUNT + override cpu count - number of simulateously processed + labels (default: 8) + single volume to existing system using --add option + + +(default cpu_count is equal to ``multiprocessing.cpu_count()``) + +The script can work with individual label(s) passed as comma separated values to ``--label`` option. Or it can be invoked with ``--all`` switch to migrate all labels. The migration is done by label. + +Additionally, on an existing CTA systenm one can use +``--add`` option to add a volume also specifying its ``--storage_class`` (e.g. "cms.foo") and ``--vo`` (e.g. "cms"). diff --git a/_sources/enstore_schema.rst.txt b/_sources/enstore_schema.rst.txt new file mode 100644 index 0000000..f4e6548 --- /dev/null +++ b/_sources/enstore_schema.rst.txt @@ -0,0 +1,48 @@ +Enstore Schema +============== + +Here is Enstore DB schema that does not contain "unattached" +tables like ``media_capacity``: + +.. image:: images/enstoredb.relationships.real.compact.png + +There are two main tables - ``file`` and ``volume`` and a bunch of ancillary +tables of which only ``file_copies_map`` is important for Enstore -> CTA transition. This table maps `primary` file copy and secondary file copies. In reality +Enstore uses maximum one extra copy of a file. Not all files have extra copies. + +File table +---------- + +Each file copy in Enstore is uniquely identified by a BFID - bit file id, +which is a string obtained by adding a three letter `brand` (which is the same for all files in a given Enstore instance), the Unix epoch, multiplied by 100000 and a counter which is reserved to resolve collisions. BFID is generated in the code base and is iserted into ``file`` table where it has unique contraint. If insert file, the counter is incremented and the record insertion is tried again. And so on until it succeeds. + +.. code-block:: python + + bfid = "CDMS" + str(time.time()*100000) + +Each file record contains PNFSID (dCache inode identifier) that ties it back to +the front end storage system; adler32 checksum; a reference to the file package for small files in SFA (Small File Aggregation) equal BFID of the package or ``null`` for `direct` files; file size; original file name; UID/GID of user who creted the file; tape location and a ``deleted`` flag that indicates whether or not the file +has been removed from namespace. + +Volume table +------------ + +Every tape in Enstore is stored in the ``volume`` table. +The many to one ``file`` to ``volume`` relation is done on integer ``volume.id`` primary key via ``file.volume`` foreign key. + +Each volume record tracks how many active/deleted/total files and bytes exist +on the volume (via DB trigger on insert/update/delete). It has a volume label; total/remaining bytes; number of mounts; number of read and write accesses; severla status fields that allow to classify tapes (e.g. ``full``, ``NOACCESS``, ``NOTALLOWED``, ``migrated``, ``migrating``). The values of status fields are arbitrary strings. + +The Enstore system has a concept of virtual library, so called libary manager (LM). The LM +manages a set of movers that have SCSI tape drives attached. LM (and movers) are Enstore servers and are configured based in Enstore instance configuration and are not captured in database schema. Each LM has a unique name and draws specific tapes allocated for it. This relation is captured in ``volume.library`` field. + +Since Enstroe LMs map to actual physical tape libraries, the volumes have to be pre-allocated to specific LMs. + +Accounting and data steering aspects of Enstore operations use ``volume.storage_group`` field (usually corresponding to a VO name); ``volume.file_family`` a string field that tells enstore to use the same set of tapes to write data having this attribute. ``volume.file_family_width`` an integer taht specified how many tape deives can be used simultaneously to write data with speciric ``file_family``. + +Enstore does not have pre-defined ``library``, ``storage_group`` and ``file_family`` concepts. When files are written to Enstore it receives the instruction fo what (``library``, ``file_family``, ``file_family_width``) to use from Enstore command line client ``encp``. When invoked, the ``encp`` client takes these parameters from directory tags of the destination directory or they can be passed as options to encp. File family value can be completelty arbitrary and user defined. Specifying random ``library`` string results in failure to write if Enstore does not actually have a running LM with matching name. + +File copies +----------- + +If `encp` is passed comma separated list of libraries via directory tag or command line option Enstore will make as many copies of the file on volumes belonging to these libraries. In practice Fermilab Enstore system uses maximum 2 file copies for a subset of data. The relation between `primary` and `secondary` is captured in ``file_copies_map`` table having ``bfid`` and ``alt_bfid`` to express the relation. diff --git a/_sources/example_migration.rst.txt b/_sources/example_migration.rst.txt new file mode 100644 index 0000000..953cd2d --- /dev/null +++ b/_sources/example_migration.rst.txt @@ -0,0 +1,146 @@ +Example Migration +================= + +Validation +---------- + +On storagedev201, run the following:: + + python3 enstore2cta.py --label VR1871M8 --add > try.log 2>&1 + +Result:: + + # tail try.log + 2023-11-06 12:41:01 INFO : **** Start processing 1 labels **** + 2023-11-06 12:41:01 INFO : Finished file migration, bootstrapping tapes copies counts + 2023-11-06 12:41:02 INFO : Doing label VR1871M8 + 2023-11-06 12:41:02 INFO : **** FINISH **** + 2023-11-06 12:41:02 INFO : Took 0 seconds + 2023-11-06 12:56:24 INFO : VR1871M8 Done, 2338 files + +"Took 0 seconds" because python3 does ``map(lambda x: x.join(), processes)`` +not the way I expected (fixed later). Took about 15 minutes!!!. Identified several issues - storagdev201 was loaded, DB ifdb07.fnal.gov performing poorly, destination chimera db running on ITB was very slow. Conclusion - we could not draw any performance numbers from this setup. But the script has been proven to work. + +Check that the file from that tape can be read by dCache:: + + [fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore > rh restore 000003042F3D23AF47BFB08A496A256A861C + Fetch request queued. + [fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore > rep ls 000003042F3D23AF47BFB08A496A256A861C + 000003042F3D23AF47BFB08A496A256A861C <---S-------L(0)[0]> 0 si={ssa_test.diskSF1T_in_LTO8G1T} + +Observed CTA reading volume ``VR1871``, and after a while:: + + [fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore > rep ls 000003042F3D23AF47BFB08A496A256A861C + 000003042F3D23AF47BFB08A496A256A861C 2097152000 si={ssa_test.diskSF1T_in_LTO8G1T} + + [fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore > pf 000003042F3D23AF47BFB08A496A256A861C + /pnfs/fs/usr/ssa_test/CTA/large/7/dc0796f8-3b21-400b-8d9f-c066a80aca5c.data + [fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore > + +File was staged and marked cached on pool. + + +Full migration +-------------- + +Used fdm1903, 8 TB NVME drive. 24 cores. + +1. use `pg_basebackup` to bring over chimera db from production +2. created CTA database from schema DDL +3. used production enstoredb as a source + + +CMS +--- + +:: + + nohup python enstore2cta_cms.py --all --skip_locations > cms.log 2>&1& + +The ``--skip_locations`` was used because I did not have CMS chimera carried over. + +Result: :: + + # tail cms.log + 2023-11-07 23:09:36 INFO : VRA931M8 Done, 3115 files + 2023-11-07 23:09:36 INFO : VRA930M8 Done, 3159 files + 2023-11-07 23:09:37 INFO : VRA932M8 Done, 3145 files + 2023-11-07 23:09:37 INFO : VRA934M8 Done, 3338 files + 2023-11-07 23:09:37 INFO : VRA936M8 Done, 3253 files + 2023-11-07 23:09:37 INFO : VRA937M8 Done, 3185 files + 2023-11-07 23:09:37 INFO : VRA938M8 Done, 3195 files + 2023-11-07 23:09:37 INFO : Finished file migration, bootstrapping tapes copies counts + 2023-11-07 23:10:44 INFO : **** FINISH **** + 2023-11-07 23:10:44 INFO : Took 2210 seconds + +On db end: :: + + cta_cms=# select pg_size_pretty(pg_database_size('cta_cms')); + pg_size_pretty + ---------------- + 16 GB + (1 row) + + + cta_cms=# select count(*) from archive_file; + count + ---------- + 28193693 + (1 row) + + + +Public +------ + +:: + + nohup python enstore2cta.py --all > public.log 2>&1& + +Above command does "everything" including inserting locations to chimera db. +Results: :: + + # tail public.log + 2023-11-07 21:04:48 INFO : VRA788M8 Done, 14591 files + 2023-11-07 21:04:49 INFO : VRA771M8 Done, 20641 files + 2023-11-07 21:04:53 INFO : VRA768M8 Done, 24322 files + 2023-11-07 21:04:53 INFO : VRA784M8 Done, 21471 files + 2023-11-07 21:05:01 INFO : VRA734M8 Done, 44020 files + 2023-11-07 21:05:56 INFO : VRA752M8 Done, 68899 files + 2023-11-07 21:06:03 INFO : VRA785M8 Done, 66068 files + 2023-11-07 21:06:03 INFO : Finished file migration, bootstrapping tapes copies counts + 2023-11-07 21:11:14 INFO : **** FINISH **** + 2023-11-07 21:11:14 INFO : Took 17813 seconds + +On db end:: + + cta_dev=# select count(*) from archive_file; + count + ----------- + 151757273 + (1 row) + + cta_dev=# select pg_size_pretty(pg_database_size('cta_dev')); + pg_size_pretty + ---------------- + 91 GB + (1 row) + + +Minor limitation +---------------- + +During migration the value of comment in ``tape.user_comment`` is assigned the value ``"Migrated from Enstore: "+volume.comment``. The width of ``tape.user_comment`` is 1000 characters. Some of the comments on Enstore volumes exceed +``1000 - len("Migrated from Enstore: ")``:: + + enstoredb=# select count(*), storage_group from volume + where character_length(comment) > 1000-23 + group by storage_group order by count(*) desc; + count | storage_group + -------+--------------- + 50 | nova + 1 | cms + (2 rows) + + +This is solved by simply truncating coment string to 1000 before inserting. diff --git a/_sources/index.rst.txt b/_sources/index.rst.txt new file mode 100644 index 0000000..22fc6bf --- /dev/null +++ b/_sources/index.rst.txt @@ -0,0 +1,93 @@ +Welcome to Enstore to CTA documentation +======================================= + +enstore2cta script +================== + +.. toctree:: + :maxdepth: 1 + + enstore2cta_script.rst + +Configuration +============= + +.. toctree:: + :maxdepth: 1 + + enstore2cta_config.rst + + +Enstore Schema +============== + +.. toctree:: + :maxdepth: 1 + + enstore_schema.rst + + +CTA Schema +=============== + +.. toctree:: + :maxdepth: 1 + + cta_schema.rst + +Enstore to CTA Mapping +====================== + +.. toctree:: + :maxdepth: 1 + + enstore2cta_mapping.rst + +dCache locatons +=============== + +.. toctree:: + :maxdepth: 1 + + dcache_locations.rst + +Small Files +=========== + +.. toctree:: + :maxdepth: 1 + + dcache_sfa.rst + +dCache Setup +============ + +.. toctree:: + :maxdepth: 1 + + dcache_setup.rst + +Example Migration +================ + +.. toctree:: + :maxdepth: 1 + + example_migration.rst + + +Source code +=========== +.. toctree:: + :maxdepth: 1 + + code/index + code/enstore2cta + + +Indices and tables +================== + +* :ref:`genindex` +* :ref:`modindex` +* :ref:`search` diff --git a/_static/_sphinx_javascript_frameworks_compat.js b/_static/_sphinx_javascript_frameworks_compat.js new file mode 100644 index 0000000..8141580 --- /dev/null +++ b/_static/_sphinx_javascript_frameworks_compat.js @@ -0,0 +1,123 @@ +/* Compatability shim for jQuery and underscores.js. + * + * Copyright Sphinx contributors + * Released under the two clause BSD licence + */ + +/** + * small helper function to urldecode strings + * + * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/decodeURIComponent#Decoding_query_parameters_from_a_URL + */ +jQuery.urldecode = function(x) { + if (!x) { + return x + } + return decodeURIComponent(x.replace(/\+/g, ' ')); +}; + +/** + * small helper function to urlencode strings + */ +jQuery.urlencode = encodeURIComponent; + +/** + * This function returns the parsed url parameters of the + * current request. Multiple values per key are supported, + * it will always return arrays of strings for the value parts. + */ +jQuery.getQueryParameters = function(s) { + if (typeof s === 'undefined') + s = document.location.search; + var parts = s.substr(s.indexOf('?') + 1).split('&'); + var result = {}; + for (var i = 0; i < parts.length; i++) { + var tmp = parts[i].split('=', 2); + var key = jQuery.urldecode(tmp[0]); + var value = jQuery.urldecode(tmp[1]); + if (key in result) + result[key].push(value); + else + result[key] = [value]; + } + return result; +}; + +/** + * highlight a given string on a jquery object by wrapping it in + * span elements with the given class name. + */ +jQuery.fn.highlightText = function(text, className) { + function highlight(node, addItems) { + if (node.nodeType === 3) { + var val = node.nodeValue; + var pos = val.toLowerCase().indexOf(text); + if (pos >= 0 && + !jQuery(node.parentNode).hasClass(className) && + !jQuery(node.parentNode).hasClass("nohighlight")) { + var span; 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+ margin: 1em 0 1em 0; + padding: 0.4em; +} + +/* -- domain module index --------------------------------------------------- */ + +table.modindextable td { + padding: 2px; + border-collapse: collapse; +} + +/* -- general body styles --------------------------------------------------- */ + +div.body { + min-width: 360px; + max-width: 800px; +} + +div.body p, div.body dd, div.body li, div.body blockquote { + -moz-hyphens: auto; + -ms-hyphens: auto; + -webkit-hyphens: auto; + hyphens: auto; +} + +a.headerlink { + visibility: hidden; +} + +a:visited { + color: #551A8B; +} + +h1:hover > a.headerlink, +h2:hover > a.headerlink, +h3:hover > a.headerlink, +h4:hover > a.headerlink, +h5:hover > a.headerlink, +h6:hover > a.headerlink, +dt:hover > a.headerlink, +caption:hover > a.headerlink, +p.caption:hover > a.headerlink, +div.code-block-caption:hover > a.headerlink { + visibility: visible; +} + +div.body p.caption { + text-align: inherit; +} + +div.body td { + text-align: left; +} + +.first { + margin-top: 0 !important; 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+ float: right; + clear: right; + overflow-x: auto; +} + +p.sidebar-title { + font-weight: bold; +} + +nav.contents, +aside.topic, +div.admonition, div.topic, blockquote { + clear: left; +} + +/* -- topics ---------------------------------------------------------------- */ + +nav.contents, +aside.topic, +div.topic { + border: 1px solid #ccc; + padding: 7px; + margin: 10px 0 10px 0; +} + +p.topic-title { + font-size: 1.1em; + font-weight: bold; + margin-top: 10px; +} + +/* -- admonitions ----------------------------------------------------------- */ + +div.admonition { + margin-top: 10px; + margin-bottom: 10px; + padding: 7px; +} + +div.admonition dt { + font-weight: bold; +} + +p.admonition-title { + margin: 0px 10px 5px 0px; + font-weight: bold; +} + +div.body p.centered { + text-align: center; + margin-top: 25px; +} + +/* -- content of sidebars/topics/admonitions -------------------------------- */ + +div.sidebar > :last-child, +aside.sidebar > :last-child, +nav.contents > :last-child, +aside.topic > :last-child, +div.topic > :last-child, +div.admonition > :last-child { + margin-bottom: 0; +} + +div.sidebar::after, +aside.sidebar::after, +nav.contents::after, +aside.topic::after, +div.topic::after, +div.admonition::after, +blockquote::after { + display: block; + content: ''; + clear: both; +} + +/* -- tables ---------------------------------------------------------------- */ + +table.docutils { + margin-top: 10px; + margin-bottom: 10px; + border: 0; + border-collapse: collapse; +} + +table.align-center { + margin-left: auto; + margin-right: auto; +} + +table.align-default { + margin-left: auto; + margin-right: auto; +} + +table caption span.caption-number { + font-style: italic; +} + +table caption span.caption-text { +} + +table.docutils td, table.docutils th { + padding: 1px 8px 1px 5px; + border-top: 0; + border-left: 0; + border-right: 0; + border-bottom: 1px solid #aaa; +} + +th { + text-align: left; + padding-right: 5px; +} + +table.citation { + border-left: solid 1px gray; + margin-left: 1px; +} + +table.citation td { + border-bottom: none; +} + +th > :first-child, +td > :first-child { + margin-top: 0px; +} + +th > :last-child, +td > :last-child { + margin-bottom: 0px; +} + +/* -- figures --------------------------------------------------------------- */ + +div.figure, figure { + margin: 0.5em; + padding: 0.5em; +} + +div.figure p.caption, figcaption { + padding: 0.3em; +} + +div.figure p.caption span.caption-number, +figcaption span.caption-number { + font-style: italic; +} + +div.figure p.caption span.caption-text, +figcaption span.caption-text { +} + +/* -- field list styles ----------------------------------------------------- */ + +table.field-list td, table.field-list th { + border: 0 !important; +} + +.field-list ul { + margin: 0; + padding-left: 1em; +} + +.field-list p { + margin: 0; +} + +.field-name { + -moz-hyphens: manual; + -ms-hyphens: manual; + -webkit-hyphens: manual; + hyphens: manual; +} + +/* -- hlist styles ---------------------------------------------------------- */ + +table.hlist { + margin: 1em 0; +} + +table.hlist td { + vertical-align: top; +} + +/* -- object description styles --------------------------------------------- */ + +.sig { + font-family: 'Consolas', 'Menlo', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; 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+ +/** + * Simple result scoring code. + */ +if (typeof Scorer === "undefined") { + var Scorer = { + // Implement the following function to further tweak the score for each result + // The function takes a result array [docname, title, anchor, descr, score, filename] + // and returns the new score. + /* + score: result => { + const [docname, title, anchor, descr, score, filename] = result + return score + }, + */ + + // query matches the full name of an object + objNameMatch: 11, + // or matches in the last dotted part of the object name + objPartialMatch: 6, + // Additive scores depending on the priority of the object + objPrio: { + 0: 15, // used to be importantResults + 1: 5, // used to be objectResults + 2: -5, // used to be unimportantResults + }, + // Used when the priority is not in the mapping. + objPrioDefault: 0, + + // query found in title + title: 15, + partialTitle: 7, + // query found in terms + term: 5, + partialTerm: 2, + }; +} + +const _removeChildren = (element) => { + while (element && element.lastChild) element.removeChild(element.lastChild); +}; + +/** + * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#escaping + */ +const _escapeRegExp = (string) => + string.replace(/[.*+\-?^${}()|[\]\\]/g, "\\$&"); // $& means the whole matched string + +const _displayItem = (item, searchTerms, highlightTerms) => { + const docBuilder = DOCUMENTATION_OPTIONS.BUILDER; + const docFileSuffix = DOCUMENTATION_OPTIONS.FILE_SUFFIX; + const docLinkSuffix = DOCUMENTATION_OPTIONS.LINK_SUFFIX; + const showSearchSummary = DOCUMENTATION_OPTIONS.SHOW_SEARCH_SUMMARY; + const contentRoot = document.documentElement.dataset.content_root; + + const [docName, title, anchor, descr, score, _filename] = item; + + let listItem = document.createElement("li"); + let requestUrl; + let linkUrl; + if (docBuilder === "dirhtml") { + // dirhtml builder + let dirname = docName + "/"; + if (dirname.match(/\/index\/$/)) + dirname = dirname.substring(0, dirname.length - 6); + else if (dirname === "index/") dirname = ""; + requestUrl = contentRoot + dirname; + linkUrl = requestUrl; + } else { + // normal html builders + requestUrl = contentRoot + docName + docFileSuffix; + linkUrl = docName + docLinkSuffix; + } + let linkEl = listItem.appendChild(document.createElement("a")); + linkEl.href = linkUrl + anchor; + linkEl.dataset.score = score; + linkEl.innerHTML = title; + if (descr) { + listItem.appendChild(document.createElement("span")).innerHTML = + " (" + descr + ")"; + // highlight search terms in the description + if (SPHINX_HIGHLIGHT_ENABLED) // set in sphinx_highlight.js + highlightTerms.forEach((term) => _highlightText(listItem, term, "highlighted")); + } + else if (showSearchSummary) + fetch(requestUrl) + .then((responseData) => responseData.text()) + .then((data) => { + if (data) + listItem.appendChild( + Search.makeSearchSummary(data, searchTerms) + ); + // highlight search terms in the summary + if (SPHINX_HIGHLIGHT_ENABLED) // set in sphinx_highlight.js + highlightTerms.forEach((term) => _highlightText(listItem, term, "highlighted")); + }); + Search.output.appendChild(listItem); +}; +const _finishSearch = (resultCount) => { + Search.stopPulse(); + Search.title.innerText = _("Search Results"); + if (!resultCount) + Search.status.innerText = Documentation.gettext( + "Your search did not match any documents. Please make sure that all words are spelled correctly and that you've selected enough categories." + ); + else + Search.status.innerText = _( + `Search finished, found ${resultCount} page(s) matching the search query.` + ); +}; +const _displayNextItem = ( + results, + resultCount, + searchTerms, + highlightTerms, +) => { + // results left, load the summary and display it + // this is intended to be dynamic (don't sub resultsCount) + if (results.length) { + _displayItem(results.pop(), searchTerms, highlightTerms); + setTimeout( + () => _displayNextItem(results, resultCount, searchTerms, highlightTerms), + 5 + ); + } + // search finished, update title and status message + else _finishSearch(resultCount); +}; + +/** + * Default splitQuery function. Can be overridden in ``sphinx.search`` with a + * custom function per language. + * + * The regular expression works by splitting the string on consecutive characters + * that are not Unicode letters, numbers, underscores, or emoji characters. + * This is the same as ``\W+`` in Python, preserving the surrogate pair area. + */ +if (typeof splitQuery === "undefined") { + var splitQuery = (query) => query + .split(/[^\p{Letter}\p{Number}_\p{Emoji_Presentation}]+/gu) + .filter(term => term) // remove remaining empty strings +} + +/** + * Search Module + */ +const Search = { + _index: null, + _queued_query: null, + _pulse_status: -1, + + htmlToText: (htmlString) => { + const htmlElement = new DOMParser().parseFromString(htmlString, 'text/html'); + htmlElement.querySelectorAll(".headerlink").forEach((el) => { el.remove() }); + const docContent = htmlElement.querySelector('[role="main"]'); + if (docContent !== undefined) return docContent.textContent; + console.warn( + "Content block not found. Sphinx search tries to obtain it via '[role=main]'. Could you check your theme or template." + ); + return ""; + }, + + init: () => { + const query = new URLSearchParams(window.location.search).get("q"); + document + .querySelectorAll('input[name="q"]') + .forEach((el) => (el.value = query)); + if (query) Search.performSearch(query); + }, + + loadIndex: (url) => + (document.body.appendChild(document.createElement("script")).src = url), + + setIndex: (index) => { + Search._index = index; + if (Search._queued_query !== null) { + const query = Search._queued_query; + Search._queued_query = null; + Search.query(query); + } + }, + + hasIndex: () => Search._index !== null, + + deferQuery: (query) => (Search._queued_query = query), + + stopPulse: () => (Search._pulse_status = -1), + + startPulse: () => { + if (Search._pulse_status >= 0) return; + + const pulse = () => { + Search._pulse_status = (Search._pulse_status + 1) % 4; + Search.dots.innerText = ".".repeat(Search._pulse_status); + if (Search._pulse_status >= 0) window.setTimeout(pulse, 500); + }; + pulse(); + }, + + /** + * perform a search for something (or wait until index is loaded) + */ + performSearch: (query) => { + // create the required interface elements + const searchText = document.createElement("h2"); + searchText.textContent = _("Searching"); + const searchSummary = document.createElement("p"); + searchSummary.classList.add("search-summary"); + searchSummary.innerText = ""; + const searchList = document.createElement("ul"); + searchList.classList.add("search"); + + const out = document.getElementById("search-results"); + Search.title = out.appendChild(searchText); + Search.dots = Search.title.appendChild(document.createElement("span")); + Search.status = out.appendChild(searchSummary); + Search.output = out.appendChild(searchList); + + const searchProgress = document.getElementById("search-progress"); + // Some themes don't use the search progress node + if (searchProgress) { + searchProgress.innerText = _("Preparing search..."); + } + Search.startPulse(); + + // index already loaded, the browser was quick! + if (Search.hasIndex()) Search.query(query); + else Search.deferQuery(query); + }, + + /** + * execute search (requires search index to be loaded) + */ + query: (query) => { + const filenames = Search._index.filenames; + const docNames = Search._index.docnames; + const titles = Search._index.titles; + const allTitles = Search._index.alltitles; + const indexEntries = Search._index.indexentries; + + // stem the search terms and add them to the correct list + const stemmer = new Stemmer(); + const searchTerms = new Set(); + const excludedTerms = new Set(); + const highlightTerms = new Set(); + const objectTerms = new Set(splitQuery(query.toLowerCase().trim())); + splitQuery(query.trim()).forEach((queryTerm) => { + const queryTermLower = queryTerm.toLowerCase(); + + // maybe skip this "word" + // stopwords array is from language_data.js + if ( + stopwords.indexOf(queryTermLower) !== -1 || + queryTerm.match(/^\d+$/) + ) + return; + + // stem the word + let word = stemmer.stemWord(queryTermLower); + // select the correct list + if (word[0] === "-") excludedTerms.add(word.substr(1)); + else { + searchTerms.add(word); + highlightTerms.add(queryTermLower); + } + }); + + if (SPHINX_HIGHLIGHT_ENABLED) { // set in sphinx_highlight.js + localStorage.setItem("sphinx_highlight_terms", [...highlightTerms].join(" ")) + } + + // console.debug("SEARCH: searching for:"); + // console.info("required: ", [...searchTerms]); + // console.info("excluded: ", [...excludedTerms]); + + // array of [docname, title, anchor, descr, score, filename] + let results = []; + _removeChildren(document.getElementById("search-progress")); + + const queryLower = query.toLowerCase(); + for (const [title, foundTitles] of Object.entries(allTitles)) { + if (title.toLowerCase().includes(queryLower) && (queryLower.length >= title.length/2)) { + for (const [file, id] of foundTitles) { + let score = Math.round(100 * queryLower.length / title.length) + results.push([ + docNames[file], + titles[file] !== title ? `${titles[file]} > ${title}` : title, + id !== null ? "#" + id : "", + null, + score, + filenames[file], + ]); + } + } + } + + // search for explicit entries in index directives + for (const [entry, foundEntries] of Object.entries(indexEntries)) { + if (entry.includes(queryLower) && (queryLower.length >= entry.length/2)) { + for (const [file, id] of foundEntries) { + let score = Math.round(100 * queryLower.length / entry.length) + results.push([ + docNames[file], + titles[file], + id ? "#" + id : "", + null, + score, + filenames[file], + ]); + } + } + } + + // lookup as object + objectTerms.forEach((term) => + results.push(...Search.performObjectSearch(term, objectTerms)) + ); + + // lookup as search terms in fulltext + results.push(...Search.performTermsSearch(searchTerms, excludedTerms)); + + // let the scorer override scores with a custom scoring function + if (Scorer.score) results.forEach((item) => (item[4] = Scorer.score(item))); + + // now sort the results by score (in opposite order of appearance, since the + // display function below uses pop() to retrieve items) and then + // alphabetically + results.sort((a, b) => { + const leftScore = a[4]; + const rightScore = b[4]; + if (leftScore === rightScore) { + // same score: sort alphabetically + const leftTitle = a[1].toLowerCase(); + const rightTitle = b[1].toLowerCase(); + if (leftTitle === rightTitle) return 0; + return leftTitle > rightTitle ? -1 : 1; // inverted is intentional + } + return leftScore > rightScore ? 1 : -1; + }); + + // remove duplicate search results + // note the reversing of results, so that in the case of duplicates, the highest-scoring entry is kept + let seen = new Set(); + results = results.reverse().reduce((acc, result) => { + let resultStr = result.slice(0, 4).concat([result[5]]).map(v => String(v)).join(','); + if (!seen.has(resultStr)) { + acc.push(result); + seen.add(resultStr); + } + return acc; + }, []); + + results = results.reverse(); + + // for debugging + //Search.lastresults = results.slice(); // a copy + // console.info("search results:", Search.lastresults); + + // print the results + _displayNextItem(results, results.length, searchTerms, highlightTerms); + }, + + /** + * search for object names + */ + performObjectSearch: (object, objectTerms) => { + const filenames = Search._index.filenames; + const docNames = Search._index.docnames; + const objects = Search._index.objects; + const objNames = Search._index.objnames; + const titles = Search._index.titles; + + const results = []; + + const objectSearchCallback = (prefix, match) => { + const name = match[4] + const fullname = (prefix ? prefix + "." : "") + name; + const fullnameLower = fullname.toLowerCase(); + if (fullnameLower.indexOf(object) < 0) return; + + let score = 0; + const parts = fullnameLower.split("."); + + // check for different match types: exact matches of full name or + // "last name" (i.e. last dotted part) + if (fullnameLower === object || parts.slice(-1)[0] === object) + score += Scorer.objNameMatch; + else if (parts.slice(-1)[0].indexOf(object) > -1) + score += Scorer.objPartialMatch; // matches in last name + + const objName = objNames[match[1]][2]; + const title = titles[match[0]]; + + // If more than one term searched for, we require other words to be + // found in the name/title/description + const otherTerms = new Set(objectTerms); + otherTerms.delete(object); + if (otherTerms.size > 0) { + const haystack = `${prefix} ${name} ${objName} ${title}`.toLowerCase(); + if ( + [...otherTerms].some((otherTerm) => haystack.indexOf(otherTerm) < 0) + ) + return; + } + + let anchor = match[3]; + if (anchor === "") anchor = fullname; + else if (anchor === "-") anchor = objNames[match[1]][1] + "-" + fullname; + + const descr = objName + _(", in ") + title; + + // add custom score for some objects according to scorer + if (Scorer.objPrio.hasOwnProperty(match[2])) + score += Scorer.objPrio[match[2]]; + else score += Scorer.objPrioDefault; + + results.push([ + docNames[match[0]], + fullname, + "#" + anchor, + descr, + score, + filenames[match[0]], + ]); + }; + Object.keys(objects).forEach((prefix) => + objects[prefix].forEach((array) => + objectSearchCallback(prefix, array) + ) + ); + return results; + }, + + /** + * search for full-text terms in the index + */ + performTermsSearch: (searchTerms, excludedTerms) => { + // prepare search + const terms = Search._index.terms; + const titleTerms = Search._index.titleterms; + const filenames = Search._index.filenames; + const docNames = Search._index.docnames; + const titles = Search._index.titles; + + const scoreMap = new Map(); + const fileMap = new Map(); + + // perform the search on the required terms + searchTerms.forEach((word) => { + const files = []; + const arr = [ + { files: terms[word], score: Scorer.term }, + { files: titleTerms[word], score: Scorer.title }, + ]; + // add support for partial matches + if (word.length > 2) { + const escapedWord = _escapeRegExp(word); + Object.keys(terms).forEach((term) => { + if (term.match(escapedWord) && !terms[word]) + arr.push({ files: terms[term], score: Scorer.partialTerm }); + }); + Object.keys(titleTerms).forEach((term) => { + if (term.match(escapedWord) && !titleTerms[word]) + arr.push({ files: titleTerms[word], score: Scorer.partialTitle }); + }); + } + + // no match but word was a required one + if (arr.every((record) => record.files === undefined)) return; + + // found search word in contents + arr.forEach((record) => { + if (record.files === undefined) return; + + let recordFiles = record.files; + if (recordFiles.length === undefined) recordFiles = [recordFiles]; + files.push(...recordFiles); + + // set score for the word in each file + recordFiles.forEach((file) => { + if (!scoreMap.has(file)) scoreMap.set(file, {}); + scoreMap.get(file)[word] = record.score; + }); + }); + + // create the mapping + files.forEach((file) => { + if (fileMap.has(file) && fileMap.get(file).indexOf(word) === -1) + fileMap.get(file).push(word); + else fileMap.set(file, [word]); + }); + }); + + // now check if the files don't contain excluded terms + const results = []; + for (const [file, wordList] of fileMap) { + // check if all requirements are matched + + // as search terms with length < 3 are discarded + const filteredTermCount = [...searchTerms].filter( + (term) => term.length > 2 + ).length; + if ( + wordList.length !== searchTerms.size && + wordList.length !== filteredTermCount + ) + continue; + + // ensure that none of the excluded terms is in the search result + if ( + [...excludedTerms].some( + (term) => + terms[term] === file || + titleTerms[term] === file || + (terms[term] || []).includes(file) || + (titleTerms[term] || []).includes(file) + ) + ) + break; + + // select one (max) score for the file. + const score = Math.max(...wordList.map((w) => scoreMap.get(file)[w])); + // add result to the result list + results.push([ + docNames[file], + titles[file], + "", + null, + score, + filenames[file], + ]); + } + return results; + }, + + /** + * helper function to return a node containing the + * search summary for a given text. keywords is a list + * of stemmed words. + */ + makeSearchSummary: (htmlText, keywords) => { + const text = Search.htmlToText(htmlText); + if (text === "") return null; + + const textLower = text.toLowerCase(); + const actualStartPosition = [...keywords] + .map((k) => textLower.indexOf(k.toLowerCase())) + .filter((i) => i > -1) + .slice(-1)[0]; + const startWithContext = Math.max(actualStartPosition - 120, 0); + + const top = startWithContext === 0 ? "" : "..."; + const tail = startWithContext + 240 < text.length ? "..." : ""; + + let summary = document.createElement("p"); + summary.classList.add("context"); + summary.textContent = top + text.substr(startWithContext, 240).trim() + tail; + + return summary; + }, +}; + +_ready(Search.init); diff --git a/_static/sphinx_highlight.js b/_static/sphinx_highlight.js new file mode 100644 index 0000000..8a96c69 --- /dev/null +++ b/_static/sphinx_highlight.js @@ -0,0 +1,154 @@ +/* Highlighting utilities for Sphinx HTML documentation. */ +"use strict"; + +const SPHINX_HIGHLIGHT_ENABLED = true + +/** + * highlight a given string on a node by wrapping it in + * span elements with the given class name. + */ +const _highlight = (node, addItems, text, className) => { + if (node.nodeType === Node.TEXT_NODE) { + const val = node.nodeValue; + const parent = node.parentNode; + const pos = val.toLowerCase().indexOf(text); + if ( + pos >= 0 && + !parent.classList.contains(className) && + !parent.classList.contains("nohighlight") + ) { + let span; + + const closestNode = parent.closest("body, svg, foreignObject"); + const isInSVG = closestNode && closestNode.matches("svg"); + if (isInSVG) { + span = document.createElementNS("http://www.w3.org/2000/svg", "tspan"); + } else { + span = document.createElement("span"); + span.classList.add(className); + } + + span.appendChild(document.createTextNode(val.substr(pos, text.length))); + const rest = document.createTextNode(val.substr(pos + text.length)); + parent.insertBefore( + span, + parent.insertBefore( + rest, + node.nextSibling + ) + ); + node.nodeValue = val.substr(0, pos); + /* There may be more occurrences of search term in this node. So call this + * function recursively on the remaining fragment. + */ + _highlight(rest, addItems, text, className); + + if (isInSVG) { + const rect = document.createElementNS( + "http://www.w3.org/2000/svg", + "rect" + ); + const bbox = parent.getBBox(); + rect.x.baseVal.value = bbox.x; + rect.y.baseVal.value = bbox.y; + rect.width.baseVal.value = bbox.width; + rect.height.baseVal.value = bbox.height; + rect.setAttribute("class", className); + addItems.push({ parent: parent, target: rect }); + } + } + } else if (node.matches && !node.matches("button, select, textarea")) { + node.childNodes.forEach((el) => _highlight(el, addItems, text, className)); + } +}; +const _highlightText = (thisNode, text, className) => { + let addItems = []; + _highlight(thisNode, addItems, text, className); + addItems.forEach((obj) => + obj.parent.insertAdjacentElement("beforebegin", obj.target) + ); +}; + +/** + * Small JavaScript module for the documentation. + */ +const SphinxHighlight = { + + /** + * highlight the search words provided in localstorage in the text + */ + highlightSearchWords: () => { + if (!SPHINX_HIGHLIGHT_ENABLED) return; // bail if no highlight + + // get and clear terms from localstorage + const url = new URL(window.location); + const highlight = + localStorage.getItem("sphinx_highlight_terms") + || url.searchParams.get("highlight") + || ""; + localStorage.removeItem("sphinx_highlight_terms") + url.searchParams.delete("highlight"); + window.history.replaceState({}, "", url); + + // get individual terms from highlight string + const terms = highlight.toLowerCase().split(/\s+/).filter(x => x); + if (terms.length === 0) return; // nothing to do + + // There should never be more than one element matching "div.body" + const divBody = document.querySelectorAll("div.body"); + const body = divBody.length ? divBody[0] : document.querySelector("body"); + window.setTimeout(() => { + terms.forEach((term) => _highlightText(body, term, "highlighted")); + }, 10); + + const searchBox = document.getElementById("searchbox"); + if (searchBox === null) return; + searchBox.appendChild( + document + .createRange() + .createContextualFragment( + '

' + + '' + + _("Hide Search Matches") + + "

" + ) + ); + }, + + /** + * helper function to hide the search marks again + */ + hideSearchWords: () => { + document + .querySelectorAll("#searchbox .highlight-link") + .forEach((el) => el.remove()); + document + .querySelectorAll("span.highlighted") + .forEach((el) => el.classList.remove("highlighted")); + localStorage.removeItem("sphinx_highlight_terms") + }, + + initEscapeListener: () => { + // only install a listener if it is really needed + if (!DOCUMENTATION_OPTIONS.ENABLE_SEARCH_SHORTCUTS) return; + + document.addEventListener("keydown", (event) => { + // bail for input elements + if (BLACKLISTED_KEY_CONTROL_ELEMENTS.has(document.activeElement.tagName)) return; + // bail with special keys + if (event.shiftKey || event.altKey || event.ctrlKey || event.metaKey) return; + if (DOCUMENTATION_OPTIONS.ENABLE_SEARCH_SHORTCUTS && (event.key === "Escape")) { + SphinxHighlight.hideSearchWords(); + event.preventDefault(); + } + }); + }, +}; + +_ready(() => { + /* Do not call highlightSearchWords() when we are on the search page. + * It will highlight words from the *previous* search query. + */ + if (typeof Search === "undefined") SphinxHighlight.highlightSearchWords(); + SphinxHighlight.initEscapeListener(); +}); diff --git a/cta_schema.html b/cta_schema.html new file mode 100644 index 0000000..6c5fd59 --- /dev/null +++ b/cta_schema.html @@ -0,0 +1,153 @@ + + + + + + + CTA Schema — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

CTA Schema

+

Here is CTA schema:

+_images/cta.relationships.real.compact.png +

Unlike Enstore schema, the CTA db schema is more normalized and specifically +separates out the concepts of logical libraries, virtual organization, storage class into corresponding tables. Therefore, the names of virtual_organization, logical_library and storage_class have to be defined by admin in advance before any file can be written.

+

Additonally CTA has a concept of tape_pool that represents logical grouping +of tapes. Each tape belongs to exactly one tape pool. Tape pools are used to keep data belonging to different VOs, storage_class (via archive_route).

+

The archive_route table connects storage_class to tape_pool and specifies how many copies a file must have.

+
+

File table

+

CTA separates the concept of file into an abstract archive_file that may +have multiple corresponding tape_file entries. The archive_file table stores file size; adler32 checksum; dis instance name; disk_file_id - an inode number on storage front end; unique file id (archive_file_id); user UID/GID and a deleted flag.

+

A tape_file references archive_file and contains infromation that ties it to the tape - like volume id (vid); location on the tape and copy number.

+
+
+

Storage class table

+

The storage class concept is somewhat similar to file family concept of Enstore. Besides unique name stotrage_class_name it specifies how many copes a file must have. And it has a reference to virtual_orhanization.

+
+
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/dcache_locations.html b/dcache_locations.html new file mode 100644 index 0000000..8df0218 --- /dev/null +++ b/dcache_locations.html @@ -0,0 +1,138 @@ + + + + + + + dCache location — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

dCache location

+

dCache needs to know location of files in CTA. It is done by utilizing URI location style and looks like:

+
cta://cta/<pnfsid>?archive_id=<archive_file_id>
+
+
+

When running migration, for each file in archive_file these locations are +back-filled into existing chimera database.

+
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/dcache_setup.html b/dcache_setup.html new file mode 100644 index 0000000..c3375b6 --- /dev/null +++ b/dcache_setup.html @@ -0,0 +1,178 @@ + + + + + + + dCache setup with CTA — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

dCache setup with CTA

+
+

Pool

+

Deploy dcache-cta driver on pool node:

+
wget https://download.dcache.org/nexus/repository/dcache-cta/dcache-cta-0.8.0-1.noarch.rpm
+rpm -Uvh --force dcache-cta-0.8.0-1.noarch.rpm
+
+
+

Define hsm on pool:

+
hsm create cta cta dcache-cta -cta-user=adm -cta-group=eosusers -cta-instance-name=eosdev -cta-frontend-addr=ctahost:17017 -io-port=1094
+
+
+

Each pool on the pool node has to havea dedicated port.

+

Define queue on pool:

+
queue define class cta * -pending=100 -total=1 -expire=7200 -open=true
+
+
+
+
+

CTA

+

On CTA end define storage class and archive route:

+
cta-admin sc add -n test.cta@cta -c 1 --vo vo -m dcachetest
+cta-admin ar add -s test.cta@cta -c 1 -t ctasystest -m dcachetest
+
+
+
+
+

PoolManager

+

In PoolManager define example dedicated CTA pool group:

+
psu create unit -store test.cta@cta
+psu create ugroup CtaSelGrp
+psu addto ugroup CtaSelGrp test.cta@cta
+
+psu create pgroup CtaPoolGroup
+psu addto pgroup CtaPoolGroup rw-stkendca28a-1
+
+psu create link CtaLink CtaSelGrp any-protocol world-net
+psu  set link  CtaLink -readpref=10 -writepref=10 -cachepref=10 -section=default
+psu addto link CtaLink CtaPoolGroup
+
+
+
+
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/dcache_sfa.html b/dcache_sfa.html new file mode 100644 index 0000000..f4f9f37 --- /dev/null +++ b/dcache_sfa.html @@ -0,0 +1,154 @@ + + + + + + + SFA files — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

SFA files

+

One of the issues that has been identified - CTA does not have +functinality corresponding to Enstore SFA (Small File Aggregation). +In the nutsheed SFA system is and extension of Enstore system that +managed intermediate disk storage in the side (intermediate between +dCache and Enstore). Depending on policies based on file_family, +storage_group, library and file sizd Enstore directs files +to the intermediate storage for subsequent perioding packaging - tarring +the small files into large package files that then are written to +tape more efficiently.

+

The child/parent relation is captured in the same file table by +setting child’s file.package_id to be equal of BFID of the package file.

+

To read SFA files in dCache/CTA setup this relation has to translate in +chimera.

+

There is a solution for it, used by similat to SFA, SAPPHIRE system by dCache. +We need to translate:

+
child_pnfsid, package_pnfsid ->
+   -> dcache://dcache/?store=vo&group=file_family&bfid={child_pnfsid}:package_pnfsid
+
+
+

I.e. the child/package relation exists as location in t_locationinfo Chimera +table.

+

This can be populated out of band.

+
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/enstore2cta_config.html b/enstore2cta_config.html new file mode 100644 index 0000000..54c6aa8 --- /dev/null +++ b/enstore2cta_config.html @@ -0,0 +1,179 @@ + + + + + + + Configuration — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

Configuration

+

Script expects configuration file enstore2cta.yaml in the current directory or pointed to by environment variable MIGRATION_CONFIG. The yaml file has to have “0600” permission bits and has to have the following parameters defned:

+
# name of the disk instance
+# will be created if no "--add" option is used
+disk_instance_name: dCache
+
+# uncomment and modify when adding single volume
+# to existing system using "--add" option
+# tape_pool_name must exist in CTA
+#tape_pool_name: ctasystest
+
+# DB connection parameters,
+# cta_db and chimera_db require r/w access
+cta_db: postgresql://user:password@host:port/db_name
+enstore_db: postgresql://user:password@host:port/db_name
+chimera_db: postgresql://user:password@host:port/db_name
+
+# Enstore to CTA media_type map.
+media_type_map:
+  LTO8: LTO8
+  M8: LTO7M
+  LTO9: LTO9
+
+# Map from the Enstore LMs to CTA logical library name(s)
+# this map is used if there is desire to map existing
+# Enstore LMs to pre-created CTA logical libraries
+# If this map is commented out the Enstore LMs will be re-created
+# as CTA logical libraries.
+# Uncomment and modify  when adding single volume to existing system using
+# --add option
+# Destination logical_library_name must exist in CTA
+#
+#library_map:
+#  CD-LTO8F1: TS4500G1
+#  CD-LTO8F1T: TS4500G1
+#  CD-LTO8G1: TS4500G1
+#  CD-LTO8G1T: TS4500G1
+#  CD-LTO8G2: TS4500G1
+#  CD-LTO8G2T: TS4500G1
+#  CTA-TESTING: TS4500G1
+#  TFF1-LTO9: TS4500G1
+#  TFF1-LTO9T: TS4500G1
+#  TFF2-LTO9: TS4500G1
+#  TFF2-LTO9M: TS4500G1
+#  TFF2-LTO9T: TS4500G1
+#  TFF1-LTO8: TS4500G1
+
+
+
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/enstore2cta_mapping.html b/enstore2cta_mapping.html new file mode 100644 index 0000000..d44c303 --- /dev/null +++ b/enstore2cta_mapping.html @@ -0,0 +1,191 @@ + + + + + + + Enstore to CTA mapping — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

Enstore to CTA mapping

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Enstore to CTA mapping

Enstore

CTA

Comment

volume.label

vid = volume.label[:6]

volume.storage_group

virtual_organization_name

+
volume.storage_group
+
+
volume.file_family
+
+
+

storage_class.storage_class_name=volume.storage_group+"."+volume.file_family+"@cta"

+
This is needed so that dCache can
+
communicate to CTA and still use storage_class
+
for data steering within dCache.
+
+

volume.library

logical_library_name

file.bfid

archive_file.archive_file_id

Sequence in CTA

file.pnfs_id

archive_file.disk_file_id

+
if bfid has entry in
+
file_copies_map
+
+
+
storage_class.nb_copies
+
archive_route.copy_nb
+
And extra entries in tape_file
+
+
+
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/enstore2cta_script.html b/enstore2cta_script.html new file mode 100644 index 0000000..829b144 --- /dev/null +++ b/enstore2cta_script.html @@ -0,0 +1,186 @@ + + + + + + + enstore2cta - Enstore to CTA migration script — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

enstore2cta - Enstore to CTA migration script

+

The script enstore2cta.py, located in enstore2cta/scripts, implements +database migration from Enstore DB tro CTA DB. Both databases must be +PostgreSQL databases. The script has various steering options (see below). +It spawns multuiple processes, each process processing a unique Enstore volume.

+
+

Requirements

+

The scrit works both with python2 and python3 and requires psycopg2 module be installed (using pip or yum install python-psycopg2).

+
+
+

Invocation

+

To run the script a config file enstore2cta.yaml must exist in +the current directory or be pointed at by MIGRATION_CONFIG environment variable. +Look for example in enstore2cta/etc. It must have “0600” permission (to protect database passwords if any).

+
$ python enstore2cta.py
+usage: enstore2cta.py [-h] [--label LABEL] [--all] [--skip_locations] [--add]
+                      [--storage_class STORAGE_CLASS] [--vo VO]
+                      [--cpu_count CPU_COUNT]
+
+This script converts Enstore metadata to CTA metadata. It looks for YAML
+configuration file pointed to by MIGRATION_CONFIG environment variable or, if
+it is not defined, it looks for file enstore2cta.yaml in current directory.
+Script will quit if configuration YAML is not found.
+
+optional arguments:
+  -h, --help            show this help message and exit
+  --label LABEL         comma separated list of labels (default: None)
+  --all                 do all labels (default: False)
+  --skip_locations      skip filling chimera locations (good for testing)
+                        (default: False)
+  --add                 add volume(s) to existing system, do not create vos,
+                        pools, archive_routes etc. These need to pre-exist in
+                        CTA db (default: False)
+  --storage_class STORAGE_CLASS
+                        Add storage class corresponding to volume. Needed when
+                        adding single volume to existing system using --add
+                        option (default: None)
+  --vo VO               vo corresponding to storage_class. Needed when adding
+                        single volume to existing system using --add option
+                        (default: None)
+  --cpu_count CPU_COUNT
+                        override cpu count - number of simulateously processed
+                        labels (default: 8)
+                        single volume to existing system using --add option
+
+
+

(default cpu_count is equal to multiprocessing.cpu_count())

+

The script can work with individual label(s) passed as comma separated values to --label option. Or it can be invoked with --all switch to migrate all labels. The migration is done by label.

+

Additionally, on an existing CTA systenm one can use +--add option to add a volume also specifying its --storage_class (e.g. “cms.foo”) and --vo (e.g. “cms”).

+
+
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/enstore_schema.html b/enstore_schema.html new file mode 100644 index 0000000..0b0bb80 --- /dev/null +++ b/enstore_schema.html @@ -0,0 +1,170 @@ + + + + + + + Enstore Schema — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

Enstore Schema

+

Here is Enstore DB schema that does not contain “unattached” +tables like media_capacity:

+_images/enstoredb.relationships.real.compact.png +

There are two main tables - file and volume and a bunch of ancillary +tables of which only file_copies_map is important for Enstore -> CTA transition. This table maps primary file copy and secondary file copies. In reality +Enstore uses maximum one extra copy of a file. Not all files have extra copies.

+
+

File table

+

Each file copy in Enstore is uniquely identified by a BFID - bit file id, +which is a string obtained by adding a three letter brand (which is the same for all files in a given Enstore instance), the Unix epoch, multiplied by 100000 and a counter which is reserved to resolve collisions. BFID is generated in the code base and is iserted into file table where it has unique contraint. If insert file, the counter is incremented and the record insertion is tried again. And so on until it succeeds.

+
bfid = "CDMS" + str(time.time()*100000)
+
+
+

Each file record contains PNFSID (dCache inode identifier) that ties it back to +the front end storage system; adler32 checksum; a reference to the file package for small files in SFA (Small File Aggregation) equal BFID of the package or null for direct files; file size; original file name; UID/GID of user who creted the file; tape location and a deleted flag that indicates whether or not the file +has been removed from namespace.

+
+
+

Volume table

+

Every tape in Enstore is stored in the volume table. +The many to one file to volume relation is done on integer volume.id primary key via file.volume foreign key.

+

Each volume record tracks how many active/deleted/total files and bytes exist +on the volume (via DB trigger on insert/update/delete). It has a volume label; total/remaining bytes; number of mounts; number of read and write accesses; severla status fields that allow to classify tapes (e.g. full, NOACCESS, NOTALLOWED, migrated, migrating). The values of status fields are arbitrary strings.

+

The Enstore system has a concept of virtual library, so called libary manager (LM). The LM +manages a set of movers that have SCSI tape drives attached. LM (and movers) are Enstore servers and are configured based in Enstore instance configuration and are not captured in database schema. Each LM has a unique name and draws specific tapes allocated for it. This relation is captured in volume.library field.

+

Since Enstroe LMs map to actual physical tape libraries, the volumes have to be pre-allocated to specific LMs.

+

Accounting and data steering aspects of Enstore operations use volume.storage_group field (usually corresponding to a VO name); volume.file_family a string field that tells enstore to use the same set of tapes to write data having this attribute. volume.file_family_width an integer taht specified how many tape deives can be used simultaneously to write data with speciric file_family.

+

Enstore does not have pre-defined library, storage_group and file_family concepts. When files are written to Enstore it receives the instruction fo what (library, file_family, file_family_width) to use from Enstore command line client encp. When invoked, the encp client takes these parameters from directory tags of the destination directory or they can be passed as options to encp. File family value can be completelty arbitrary and user defined. Specifying random library string results in failure to write if Enstore does not actually have a running LM with matching name.

+
+
+

File copies

+

If encp is passed comma separated list of libraries via directory tag or command line option Enstore will make as many copies of the file on volumes belonging to these libraries. In practice Fermilab Enstore system uses maximum 2 file copies for a subset of data. The relation between primary and secondary is captured in file_copies_map table having bfid and alt_bfid to express the relation.

+
+
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/example_migration.html b/example_migration.html new file mode 100644 index 0000000..4c36911 --- /dev/null +++ b/example_migration.html @@ -0,0 +1,269 @@ + + + + + + + Example Migration — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

Example Migration

+
+

Validation

+

On storagedev201, run the following:

+
python3 enstore2cta.py --label VR1871M8 --add > try.log 2>&1
+
+
+

Result:

+
# tail try.log
+2023-11-06 12:41:01 INFO : **** Start processing 1  labels ****
+2023-11-06 12:41:01 INFO : Finished file migration, bootstrapping tapes copies counts
+2023-11-06 12:41:02 INFO : Doing label VR1871M8
+2023-11-06 12:41:02 INFO : **** FINISH ****
+2023-11-06 12:41:02 INFO : Took 0 seconds
+2023-11-06 12:56:24 INFO : VR1871M8 Done, 2338 files
+
+
+

“Took 0 seconds” because python3 does map(lambda x: x.join(), processes) +not the way I expected (fixed later). Took about 15 minutes!!!. Identified several issues - storagdev201 was loaded, DB ifdb07.fnal.gov performing poorly, destination chimera db running on ITB was very slow. Conclusion - we could not draw any performance numbers from this setup. But the script has been proven to work.

+

Check that the file from that tape can be read by dCache:

+
[fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore >  rh restore 000003042F3D23AF47BFB08A496A256A861C
+Fetch request queued.
+[fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore > rep ls  000003042F3D23AF47BFB08A496A256A861C
+000003042F3D23AF47BFB08A496A256A861C <---S-------L(0)[0]> 0 si={ssa_test.diskSF1T_in_LTO8G1T}
+
+
+

Observed CTA reading volume VR1871, and after a while:

+
[fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore > rep ls  000003042F3D23AF47BFB08A496A256A861C
+000003042F3D23AF47BFB08A496A256A861C <C-------X--L(0)[0]> 2097152000 si={ssa_test.diskSF1T_in_LTO8G1T}
+
+[fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore > pf 000003042F3D23AF47BFB08A496A256A861C
+/pnfs/fs/usr/ssa_test/CTA/large/7/dc0796f8-3b21-400b-8d9f-c066a80aca5c.data
+[fndcaitb3] (rw-stkendca28a-1@rw-stkendca28a-1Domain) enstore >
+
+
+

File was staged and marked cached on pool.

+
+
+

Full migration

+

Used fdm1903, 8 TB NVME drive. 24 cores.

+
    +

  1. use pg_basebackup to bring over chimera db from production

    2. +

  2. created CTA database from schema DDL

    3. +

  3. used production enstoredb as a source

    4. +
+
+
+

CMS

+
nohup  python enstore2cta_cms.py --all --skip_locations > cms.log 2>&1&
+
+
+

The --skip_locations was used because I did not have CMS chimera carried over.

+

Result:

+
# tail cms.log
+2023-11-07 23:09:36 INFO : VRA931M8 Done, 3115 files
+2023-11-07 23:09:36 INFO : VRA930M8 Done, 3159 files
+2023-11-07 23:09:37 INFO : VRA932M8 Done, 3145 files
+2023-11-07 23:09:37 INFO : VRA934M8 Done, 3338 files
+2023-11-07 23:09:37 INFO : VRA936M8 Done, 3253 files
+2023-11-07 23:09:37 INFO : VRA937M8 Done, 3185 files
+2023-11-07 23:09:37 INFO : VRA938M8 Done, 3195 files
+2023-11-07 23:09:37 INFO : Finished file migration, bootstrapping tapes copies counts
+2023-11-07 23:10:44 INFO : **** FINISH ****
+2023-11-07 23:10:44 INFO : Took 2210 seconds
+
+
+

On db end:

+
cta_cms=# select pg_size_pretty(pg_database_size('cta_cms'));
+pg_size_pretty
+----------------
+16 GB
+(1 row)
+
+
+cta_cms=# select count(*) from archive_file;
+  count
+----------
+ 28193693
+(1 row)
+
+
+
+
+

Public

+
nohup  python enstore2cta.py --all  > public.log 2>&1&
+
+
+

Above command does “everything” including inserting locations to chimera db. +Results:

+
# tail public.log
+2023-11-07 21:04:48 INFO : VRA788M8 Done, 14591 files
+2023-11-07 21:04:49 INFO : VRA771M8 Done, 20641 files
+2023-11-07 21:04:53 INFO : VRA768M8 Done, 24322 files
+2023-11-07 21:04:53 INFO : VRA784M8 Done, 21471 files
+2023-11-07 21:05:01 INFO : VRA734M8 Done, 44020 files
+2023-11-07 21:05:56 INFO : VRA752M8 Done, 68899 files
+2023-11-07 21:06:03 INFO : VRA785M8 Done, 66068 files
+2023-11-07 21:06:03 INFO : Finished file migration, bootstrapping tapes copies counts
+2023-11-07 21:11:14 INFO : **** FINISH ****
+2023-11-07 21:11:14 INFO : Took 17813 seconds
+
+
+

On db end:

+
cta_dev=# select count(*) from archive_file;
+   count
+-----------
+ 151757273
+(1 row)
+
+cta_dev=# select pg_size_pretty(pg_database_size('cta_dev'));
+ pg_size_pretty
+----------------
+ 91 GB
+(1 row)
+
+
+
+
+

Minor limitation

+

During migration the value of comment in tape.user_comment is assigned the value "Migrated from Enstore: "+volume.comment. The width of tape.user_comment is 1000 characters. Some of the comments on Enstore volumes exceed +1000 - len("Migrated from Enstore: "):

+
enstoredb=# select count(*), storage_group from volume
+            where character_length(comment) > 1000-23
+            group by storage_group order by count(*) desc;
+ count | storage_group
+-------+---------------
+    50 | nova
+     1 | cms
+(2 rows)
+
+
+

This is solved by simply truncating coment string to 1000 before inserting.

+
+
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/genindex.html b/genindex.html new file mode 100644 index 0000000..d6c99dd --- /dev/null +++ b/genindex.html @@ -0,0 +1,128 @@ + + + + + + Index — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+
    +
    • +
  • Index
    • +
  • +
    • +
+
+
+
+
+ + +

Index

+ +
+ +
+ + +
+
+
+ +
+ +
+

© Copyright Fermi Research Alliance, LLC.

+
+ + Built with Sphinx using a + theme + provided by Read the Docs. + + +
+
+
+
+
+ + + + \ No newline at end of file diff --git a/index.html b/index.html new file mode 100644 index 0000000..8412ed1 --- /dev/null +++ b/index.html @@ -0,0 +1,215 @@ + + + + + + + Welcome to Enstore to CTA documentation — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+ +
+
+
+
+ +
+

Welcome to Enstore to CTA documentation

+
+
+

enstore2cta script

+
+ +
+
+
+

Configuration

+
+ +
+
+
+

Enstore Schema

+
+ +
+
+
+

CTA Schema

+
+ +
+
+
+

Enstore to CTA Mapping

+
+ +
+
+
+

dCache locatons

+
+ +
+
+
+

Small Files

+
+ +
+
+
+

dCache Setup

+
+ +
+
+
+

Example Migration

+
+ +
+
+
+

Source code

+
+
+
+
+

Indices and tables

+ +
+ + +
+
+ +
+
+
+
+ + + + \ No newline at end of file diff --git a/objects.inv b/objects.inv new file mode 100644 index 0000000..2a05c63 --- /dev/null +++ b/objects.inv @@ -0,0 +1,6 @@ +# Sphinx inventory version 2 +# Project: enstore2cta +# Version: +# The remainder of this file is compressed using zlib. +xڅMj0>\ v]-tХQ-LH8t'7ߛ<5īvo͇VY΂Ɨ#X_5KM+4efI0$ٔF0yUtQV谻= +[;´S6SprӣF%Š}ZԣBŭvk'&P7mF7weVLԷpN0Pȇ$-X/: \ No newline at end of file diff --git a/search.html b/search.html new file mode 100644 index 0000000..6026df2 --- /dev/null +++ b/search.html @@ -0,0 +1,143 @@ + + + + + + Search — enstore2cta 0.1.0 documentation + + + + + + + + + + + + + + + + + + +
+ + +
+ +
+
+
+
    +
    • +
  • Search
    • +
  • +
    • +
+
+
+
+
+ + + + +
+ +
+ +
+
+
+ +
+ +
+

© Copyright Fermi Research Alliance, LLC.

+
+ + Built with Sphinx using a + theme + provided by Read the Docs. + + +
+
+
+
+
+ + + + + + + + + \ No newline at end of file diff --git a/searchindex.js b/searchindex.js new file mode 100644 index 0000000..80915a2 --- /dev/null +++ b/searchindex.js @@ -0,0 +1 @@ +Search.setIndex({"docnames": ["cta_schema", "dcache_locations", "dcache_setup", "dcache_sfa", "enstore2cta_config", "enstore2cta_mapping", "enstore2cta_script", "enstore_schema", "example_migration", "index"], "filenames": ["cta_schema.rst", "dcache_locations.rst", "dcache_setup.rst", "dcache_sfa.rst", "enstore2cta_config.rst", "enstore2cta_mapping.rst", "enstore2cta_script.rst", "enstore_schema.rst", "example_migration.rst", "index.rst"], "titles": ["CTA Schema", "dCache location", "dCache setup with CTA", "SFA files", "Configuration", "Enstore to CTA mapping", "enstore2cta - Enstore to CTA migration script", "Enstore Schema", "Example Migration", "Welcome to Enstore to CTA documentation"], "terms": {"here": [0, 7], "i": [0, 1, 3, 4, 5, 6, 7, 8], "unlik": 0, "enstor": [0, 3, 4, 8], "db": [0, 4, 6, 7, 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