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https://issues.apache.org/jira/browse/CASSANDRA-14556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16560122#comment-16560122
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Aleksey Yeschenko commented on CASSANDRA-14556:
-----------------------------------------------
Committed to trunk as
[47a12c52a313258307ab88392f75c5866d9a2bb1|https://github.com/apache/cassandra/commit/47a12c52a313258307ab88392f75c5866d9a2bb1]
and to dtests as
[d291b2b90326c62c2df8f49098c6deb915c16460|https://github.com/apache/cassandra-dtest/commit/d291b2b90326c62c2df8f49098c6deb915c16460].
Thanks all.
> Optimize streaming path in Cassandra
> ------------------------------------
>
> Key: CASSANDRA-14556
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14556
> Project: Cassandra
> Issue Type: Improvement
> Components: Streaming and Messaging
> Reporter: Dinesh Joshi
> Assignee: Dinesh Joshi
> Priority: Major
> Labels: Performance
> Fix For: 4.x
>
>
> During streaming, Cassandra reifies the sstables into objects. This creates
> unnecessary garbage and slows down the whole streaming process as some
> sstables can be transferred as a whole file rather than individual
> partitions. The objective of the ticket is to detect when a whole sstable can
> be transferred and skip the object reification. We can also use a zero-copy
> path to avoid bringing data into user-space on both sending and receiving
> side.
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