Alexey Goncharuk created IGNITE-11704:
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Summary: 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
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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