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https://issues.apache.org/jira/browse/UNOMI-724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kevan Jahanshahi closed UNOMI-724.
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> Session/Event index rollover: Implement ElasticSearch rollover recommandation
> and system to manage current monthly indices
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: UNOMI-724
> URL: https://issues.apache.org/jira/browse/UNOMI-724
> Project: Apache Unomi
> Issue Type: Improvement
> Affects Versions: unomi-2.1.0
> Reporter: Kevan Jahanshahi
> Assignee: David Griffon
> Priority: Major
> Fix For: unomi-2.2.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> A POC have been done to validate the usage of Rollover ES API that combine a
> lifecycle policy and aliases to replace the current monthly indices rotation.
> The goal behind that is to apply current ElasticSearch recommandation on
> Index/Shards sizing to reduce costs related to monthly indices not being
> sized correctly due to unpredictable amount of events/sessions per months.
> POC PR: [https://github.com/apache/unomi/pull/567]
> h2. Prerequisite before starting this ticket:
> Read carefully ES documentation regarding:
> * Rollover API:
> [https://www.elastic.co/guide/en/elasticsearch/reference/7.17/ilm-rollover.html]
>
> h2. What remain to be done in current ticket ?
> * Cleanup the POC
> ** cleanup used old functions from previous implem
> ** deprecate old param not used like: *dateHint*
> ** global code review and cleanup of the new implem (if necessary contact me
> directly to discuss improvement point)
> * make the rollover configurable using configuration file ({*}max_age,
> max_size, max_primary_shard_size, max_docs.{*} See documentations regarding
> the rollover capabilities:
> [https://www.elastic.co/guide/en/elasticsearch/reference/7.17/ilm-rollover.html]
> )
> * Disable/quarantine tests associated with the purge, since these tests will
> be broken as a result of this story. Create ticket to re-enable the tests
> once epic is complete and before releasing the next version of Unomi.
> Out of current ticket scope:
> - check performance for session loaded using query:
> https://issues.apache.org/jira/browse/UNOMI-725
> - fixing the purge system: https://issues.apache.org/jira/browse/UNOMI-726
> - fixing the merge system: https://issues.apache.org/jira/browse/UNOMI-727
> - handle migration: https://issues.apache.org/jira/browse/UNOMI-728
> h2. Automated test
> Query Elasticsearch to verify lifecycle policy once the configuration has
> been applied in Unomi (this way we do not test Elasticsearch rollover
> mechanism but ensure the configuration is properly applied).
> h2. Manual Test Case:
> - Pick one of the configuration (such as max_docs), configure Unomi with a
> very low value
> - Create anonymous session
> - Verify rotation is happening when sessions are created and get above the
> configured threshold.
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