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Posted to commits@cassandra.apache.org by "Dinesh Joshi (JIRA)" <ji...@apache.org> on 2018/07/03 19:10:00 UTC
[jira] [Commented] (CASSANDRA-14556) Optimize streaming path in
Cassandra
[ https://issues.apache.org/jira/browse/CASSANDRA-14556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16531820#comment-16531820 ]
Dinesh Joshi commented on CASSANDRA-14556:
------------------------------------------
[~aweisberg] this is a big one so creating a PR - [https://github.com/apache/cassandra/pull/239] Could you please review it?
> 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
> Fix For: 4.0, 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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