i want to purge all revisions of keys from etcd db daily, what should i use in auto compaction?

[ssengar]

i want to purge all older revisions of keys from etcd db daily only keeping the current revision, what should pass in etcd startup flags to achieve defrag i'm running as a cronjob.

[jmhbnz]

Hi @ssengar - Thanks for your question. The flags you will want are --auto-compaction-retention and --auto-compaction-mode.

Example for daily auto compaction: etcd --auto-compaction-mode=periodic --auto-compaction-retention=24h

Refer:

• https://etcd.io/docs/v3.5/op-guide/maintenance/#auto-compaction
• https://etcd.io/docs/v3.5/op-guide/configuration

[ssengar]

Hi @jmhbnz ,

thanks for your reply , just to understand these flags if i put --auto-compaction-mode=periodic --auto-compaction-retention=24h apart from latest revision all other revisions will be dropped every 24hrs...is my understanding correct?

[jmhbnz]

That's my understanding yes. There is a bit of nuance about the sliding window approach etcd uses that I believe runs every 1/6th of an hour to track revisions of changed records but the actual compaction process should be every 24h with those flags and be pruning any redundant versions yes.