Jon Haddad created CASSANDRA-19988:
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Summary: use direct io when streaming through the JVM
Key: CASSANDRA-19988
URL: https://issues.apache.org/jira/browse/CASSANDRA-19988
Project: Cassandra
Issue Type: Improvement
Reporter: Jon Haddad
In the case of the non-ZCS streaming path, we read entire SSTables. This
causes a high rate of page cache churn and should be avoided. Using direct IO
we will avoid the churn and we should see read latency remain stable, rather
than jittery as a result of decreased page cache hit rate.
This affects both our streaming slow path and when sending entire files.
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