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2021_10_07_meeting_minutes.md

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Meeting Minutes

2021-10-07, 1300, JN, MC

Topics

  • factored out slikv sqlite3 as key-value store; replaces mkocidb
  • prepare deployment; VM in progress; 8; 16; 500G; debian 10; systemd unit
    • collect ideas on deployment
    • tools to generate suitable data stores (e.g. via OCI, a copy of solr, etc.)
    • a service unit for the server
    • implement HTTP cache policy
    • implement some logging strategy
    • 12-factor app considerations, e.g. switch to envconfig
    • some frontend like nginx
    • an ansible playbook for tools and service
  • deployment, maybe next week; test-frontend
  • db backup on a network mount
  • SSHKEY (sent)
  • data acquisition; packaging and deployment; "DEB", systemd, /etc/...; [1TB]
  • optimization ideas: ETag, Cache-Control, ...; sqlite3; proxy: nginx
  • data analysis, e.g. OCI

Notes

  • machine online; via UBL net
  • HTTP port; HTTPS port

S312-2021

  • fast rebuild from a local copy: via set of local sqlite3 databases

from OCI dump to database, we need about 2h with mkocidb, getting an offline version of SOLR with solrdump can take a day or more; DOI annotation can take 2h; the derived databases may take an hour; a fresh setup every week may be possible

  • automatic pipeline: put commands into cronjob; run commands manually
  • query index for DOI: not supported, we use workarounds
  • data reduction: on the fly, included matched and unmatched items
  • open citations now 1B+ in size (about 30% larger)
  • metadata from OCI: but we use metadata from index or just the DOI (for the unmatched items)
  • definition of slub_id [3] - is it just id
  • REST API: query via doi or id possible - do we need the metadata of the queries record, too?
  • delta: do reports per setup (e.g. new OCI dump), then a separate program to compare to reports

Some generic tools we may get out of this:

  • a fast sqlite3 key-value database builder; inserting and indexing 10M entries takes 27s - about 370K rows/s; currently mkocidb, but could be made more generic

miku/mkocidb ... mkkvdb