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From " Brian Hess (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9304) COPY TO improvements
Date Fri, 23 Oct 2015 13:25:27 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14970961#comment-14970961
] 

 Brian Hess commented on CASSANDRA-9304:
----------------------------------------

[~Stefania] have you re-run the benchmark that [~dkua] performed above (or something similar)
- specifically, comparing the "old version" to this new version (and to the cassandra-unloader
(https://github.com/brianmhess/cassandra-loader))?  What performance improvement do we see?

> COPY TO improvements
> --------------------
>
>                 Key: CASSANDRA-9304
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9304
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Stefania
>            Priority: Minor
>              Labels: cqlsh
>             Fix For: 3.x, 2.1.x, 2.2.x
>
>
> COPY FROM has gotten a lot of love.  COPY TO not so much.  One obvious improvement could
be to parallelize reading and writing (write one page of data while fetching the next).



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