Andrey Gura created IGNITE-7408:
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Summary: Document WAL changes
Key: IGNITE-7408
URL: https://issues.apache.org/jira/browse/IGNITE-7408
Project: Ignite
Issue Type: Task
Environment: 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.
Reporter: Andrey Gura
Fix For: 2.4
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