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Sessions transfer #5229

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Sessions transfer #5229

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@ruslandoga ruslandoga commented Mar 22, 2025

Attempt at transferring in-memory sessions across deployments using shared persistent cache and Unix domain sockets.

@ruslandoga ruslandoga changed the title sessions transfer Sessions transfer (PoC 1) Mar 22, 2025
@ruslandoga ruslandoga changed the title Sessions transfer (PoC 1) Sessions transfer Mar 22, 2025
@ruslandoga ruslandoga force-pushed the sessions-transfer branch 6 times, most recently from 17a0173 to 96d1b27 Compare March 23, 2025 09:40
@ruslandoga ruslandoga requested a review from Copilot March 28, 2025 17:58
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Copilot wasn't able to review any files in this pull request.

Files not reviewed (4)
  • lib/plausible/application.ex: Language not supported
  • lib/plausible/session/persistence.ex: Language not supported
  • lib/plausible/session/persistence/tinysock.ex: Language not supported
  • lib/plausible_web/controllers/api/system_controller.ex: Language not supported

@ruslandoga ruslandoga force-pushed the sessions-transfer branch 8 times, most recently from 6ddc0b7 to e54aff6 Compare April 1, 2025 19:45
@ruslandoga ruslandoga marked this pull request as ready for review April 2, 2025 06:34
@ruslandoga ruslandoga requested review from aerosol and cnkk April 2, 2025 06:34

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github-actions bot commented Apr 7, 2025

Preview environment👷🏼‍♀️🏗️
PR-5229

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@aerosol aerosol added preview and removed preview labels Apr 7, 2025
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github-actions bot commented Apr 7, 2025

Preview environment👷🏼‍♀️🏗️
PR-5229

defp file_stat_ctime(path) do
case File.stat(path) do
{:ok, stat} -> stat.ctime
{:error, _} -> nil
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What category of errors result with nil here? Shouldn't we then filter the path out and log failure?

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@ruslandoga ruslandoga Apr 8, 2025

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I haven't thought about it much, but the idea was to allow tinysock client to remove stale/broken files in sock_connect_or_rm and since tuple (normal stat.ctime) is > nil, this ordering is like "asc nulls last" so the cleanup happens in the end of the transfer.

@@ -0,0 +1,31 @@
defmodule Plausible.Session.Transfer.Alive do
@moduledoc false
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It would be beneficial to keep the docs.

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@ruslandoga ruslandoga Apr 8, 2025

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I wanted to have only one place with the docs, Plausible.Session.Transfer.
It already briefly explains the role of this "alive" process.

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2 participants