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https://issues.apache.org/jira/browse/IGNITE-7408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Denis Magda closed IGNITE-7408.
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> Document WAL changes
> --------------------
>
> Key: IGNITE-7408
> URL: https://issues.apache.org/jira/browse/IGNITE-7408
> Project: Ignite
> Issue Type: Task
> Components: documentation
> Reporter: Andrey Gura
> Assignee: Denis Magda
> Priority: Major
> Labels: documentation
> Fix For: 2.4
>
>
> WAL documentation should be updated accordingly to IGNITE-6339 issue.
> The following changes can affect WAL configuration and behavior:
> # {{DataStorageConfiguration.setWalBufferSize}} added instead of
> {{PersistentStoreConfiguration.setTlbSize}}. By default WAL buffer size
> equals WAL segment size if memory mapped file is enabled, and (WAL segment
> size) / 4 if memory mapped file is disabled.
> # Memory mapped file is enabled by default and provides better performance.
> Memory mapped file usage can be turned off. {{IGNITE_WAL_MMAP}} property with
> {{false}} value should be added to the JVM arguments:
> {{-DIGNITE_WAL_MMAP=false}}.
> # If memory mapped file is enabled then {{BACKGROUND}} and {{LOG_ONLY}} WAL
> modes behave identically and don't have any differences in performance or
> data integrity guarantees.
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