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[Cache] Redis garbage collector#50423

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zoidbergx wants to merge3 commits intosymfony:7.4
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fromCandoImage:redis-garbage-collector

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zoidbergx
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@zoidbergxzoidbergx commentedMay 25, 2023
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QA
Branch?6.4
Bug fix?no
New feature?yes
Deprecations?no
TicketsFix#47835
LicenseMIT
Doc PR

added a garbage collector for Redis to remove Tags which have no references, see#47835 for further details

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Hey!

I see that this is your first PR. That is great! Welcome!

Symfony has acontribution guide which I suggest you to read.

In short:

  • Always add tests
  • Keep backward compatibility (seehttps://symfony.com/bc).
  • Bug fixes must be submitted against the lowest maintained branch where they apply (seehttps://symfony.com/releases)
  • Features and deprecations must be submitted against the 6.4 branch.

Review the GitHub status checks of your pull request and try to solve the reported issues. If some tests are failing, try to see if they are failing because of this change.

When two Symfony core team members approve this change, it will be merged and you will become an official Symfony contributor!
If this PR is merged in a lower version branch, it will be merged up to all maintained branches within a few days.

I am going to sit back now and wait for the reviews.

Cheers!

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It looks like you unchecked the "Allow edits from maintainer" box. That is fine, but please note that if you have multiple commits, you'll need to squash your commits into one before this can be merged. Or, you can check the "Allow edits from maintainers" box and the maintainer can squash for you.

Cheers!

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@zoidbergx it looks like you merged your non-rebased remote branch instead of forcing the push after the rebase was done, which means your PR contains duplicate commits in its history and a merge commit.

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bug fix: yes in the description looks wrong to me (in general, your change cannot be both a bug fix and a new feature)

@das-peterdas-peterforce-pushed theredis-garbage-collector branch from3f85db9 to88258e4CompareMay 25, 2023 10:09
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zoidbergx commentedMay 25, 2023
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@stof >bug fix: yes in the description looks wrong to me (in general, your change cannot be both a bug fix and a new feature)

yeah, for me it was a little bit of both as the current implementation could lead into a buggy cache but it may be more like a feature to have a garbage collector for Redis

@das-peterdas-peterforce-pushed theredis-garbage-collector branch from88258e4 tofd3cfe5CompareMay 25, 2023 10:12
@nicolas-grekasnicolas-grekas added Cache and removed Bug labelsMay 29, 2023
@carsonbotcarsonbot changed the titleRedis garbage collector[Cache] Redis garbage collectorMay 29, 2023
apply suggestionCo-authored-by: Alexander M. Turek <me@derrabus.de>
local tagPrefix = string.gsub(KEYS[1], prefix, "")
return redis.call('SCAN', cursor, 'COUNT', 5000, 'MATCH', '*' .. tagPrefix .. '*', 'TYPE', 'set')
EOLUA;
$cursor = null;

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This should be 0, null leads to something like:ERR invalid cursor script: 5880028e0d564320af1c1aabb595c9985f5a1a04, on @user_script:5.
This is used in SCAN which expects 0 to start and returns 0 when the iteration is finished:https://redis.io/docs/latest/commands/scan/
Unfortunately I can't find older docs and have to assume this is backward compatible.

// cache items.
foreach ($tagKeys as $tagKey) {
$tagKey = substr($tagKey, \strlen($prefix));
$cursor = null;

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This should be 0, null leads to something like:ERR invalid cursor script: 5880028e0d564320af1c1aabb595c9985f5a1a04, on @user_script:5.
This is used in SCAN which expects 0 to start and returns 0 when the iteration is finished:https://redis.io/docs/latest/commands/scan/
Unfortunately I can't find older docs and have to assume this is backward compatible.

@fabpotfabpot modified the milestones:7.2,7.3Nov 20, 2024
@fabpotfabpot modified the milestones:7.3,7.4May 26, 2025
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Implement PrunableInterface on RedisTagAwareAdapter
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