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https://issues.apache.org/jira/browse/IGNITE-8017?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ilya Lantukh reassigned IGNITE-8017:
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Assignee: (was: Ilya Lantukh)
> Disable WAL during initial preloading
> -------------------------------------
>
> Key: IGNITE-8017
> URL: https://issues.apache.org/jira/browse/IGNITE-8017
> Project: Ignite
> Issue Type: Improvement
> Reporter: Ilya Lantukh
> Priority: Major
>
> While handling SupplyMessage, node handles each supplied data entry
> separately, which causes a WAL record for each entry to be written. It
> significantly limits preloading speed, especially with WALMode == FSYNC - it
> will perform fsync for every entry!
> We can improve rebalancing speed and reduce pressure on disk by disabling WAL
> until all data is loaded. The disadvantage of this approach is that data
> might get corrupted if node crashes - but node that crashed during preloading
> has to clear all it's data anyway. However, it is important to distinguish
> situations when new node joined cluster or added to baseline topology (and
> doesn't hold any data) and when additional partitions got assigned to node
> after baseline topology changed (in this case node has to keep all data in
> consistent state).
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