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From aweisberg <...@git.apache.org>
Subject [GitHub] cassandra pull request #239: [CASSANDRA-14556] Optimize Streaming
Date Fri, 13 Jul 2018 22:20:36 GMT
Github user aweisberg commented on a diff in the pull request:

    https://github.com/apache/cassandra/pull/239#discussion_r202486275
  
    --- Diff: conf/cassandra.yaml ---
    @@ -784,6 +784,15 @@ compaction_throughput_mb_per_sec: 16
     # between the sstables, reducing page cache churn and keeping hot rows hot
     sstable_preemptive_open_interval_in_mb: 50
     
    +# When enabled, permits Cassandra to zero copy eligible SSTables between
    --- End diff --
    
    Worth documenting this optimization relies on having sstables that are wholly contained
in the range being streamed and that configurations like size tiered without 6696 won't benefit,
and would in fact spend time reading indexes checking to see if the optimization applies?
Leveled should always benefit from this optimization.


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