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https://issues.apache.org/jira/browse/IGNITE-19417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kirill Tkalenko updated IGNITE-19417:
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Epic Link: IGNITE-20166
> Provide low watermark for metastorage compaction
> ------------------------------------------------
>
> Key: IGNITE-19417
> URL: https://issues.apache.org/jira/browse/IGNITE-19417
> Project: Ignite
> Issue Type: Improvement
> Reporter: Semyon Danilov
> Priority: Major
> Labels: ignite-3
>
> We should implement a process of increasing a low watermark for the
> metastorage compaction. I believe it should be a scheduled task in the top
> component (IgniteImpl) because it will needed information about open cursors
> and partitions.
> MetaStorage compaction low watermark should be a subject to the following
> rules:
> 1. It cannot be higher than the Partition LWM.
> 2. It cannot be higher than any cursor's timestamp.
> 3. It cannot be higher than the timestamp of any schema version for which a
> tuple exists that is serialized using this schema.
> 4. It may be increased as soon as new LWM doesn't contradict all of the 3
> points above.
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