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https://issues.apache.org/jira/browse/IGNITE-6552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16189836#comment-16189836
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Dmitriy Pavlov commented on IGNITE-6552:
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In corner case we need to keep at least 1 finished checkpoint (we dont' count
incompleted). For more info please see
https://cwiki.apache.org/confluence/display/IGNITE/Ignite+Persistent+Store+-+under+the+hood#IgnitePersistentStore-underthehood-WALhistorysize
We can't keep less than 1 completed CP, because we will not be able to restore.
We should avoid applying timeout if we remove latest completed checkpoint.
> The ability to set WAL history size in time units
> -------------------------------------------------
>
> Key: IGNITE-6552
> URL: https://issues.apache.org/jira/browse/IGNITE-6552
> Project: Ignite
> Issue Type: Improvement
> Components: persistence
> Affects Versions: 2.2
> Reporter: Vladislav Pyatkov
>
> We can to set size of WAL history in number of checkpoints.
> {code}
> org.apache.ignite.configuration.PersistentStoreConfiguration#setWalHistorySize
> {code}
> But it is not convenient fro end user. Nobody to say how many checkpoint to
> occur over several minutes.
> I think, it will be better if we will have ability to set WAL history size in
> time units (milliseconds for example).
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