[jira] [Updated] (IGNITE-11704) Write tombstones during rebalance to get rid of deferred delete buffer

["Pavel Kovalenko (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-11704?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pavel Kovalenko updated IGNITE-11704:
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    Ignite Flags:   (was: Docs Required)

> Write tombstones during rebalance to get rid of deferred delete buffer
> ----------------------------------------------------------------------
>
>                 Key: IGNITE-11704
>                 URL: https://issues.apache.org/jira/browse/IGNITE-11704
>             Project: Ignite
>          Issue Type: Improvement
>            Reporter: Alexey Goncharuk
>            Assignee: Pavel Kovalenko
>            Priority: Major
>              Labels: rebalance
>             Fix For: 2.8
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Currently Ignite relies on deferred delete buffer in order to handle write-remove conflicts during rebalance. Given the limit size of the buffer, this approach is fundamentally flawed, especially in case when persistence is enabled.
> I suggest to extend the logic of data storage to be able to store key tombstones - to keep version for deleted entries. The tombstones will be stored when rebalance is in progress and should be cleaned up when rebalance is completed.
> Later this approach may be used to implement fast partition rebalance based on merkle trees (in this case, tombstones should be written on an incomplete baseline).



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