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From "Adam Holmberg (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9302) Optimize cqlsh COPY FROM, part 3
Date Wed, 05 Aug 2015 21:24:06 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14658970#comment-14658970
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Adam Holmberg commented on CASSANDRA-9302:
------------------------------------------

Pure python murmur3 is available on a branch [here|https://github.com/datastax/python-driver/tree/363].
Ready for Python 2. Still going to look at Python 3 and some possible optimizations.

I hope nobody is surprised that the Python implementation is much slower than the C implementation.
There is a fair amount of bit twiddling while fighting the Python integer system to mimic
fixed width types and logical shifts. Hopefully we can amortize this with batching by partition
and/or giving it more processes.

Has there been discussion anywhere about implementing a loader on the Java driver, now that
it's bundled with the server?

> Optimize cqlsh COPY FROM, part 3
> --------------------------------
>
>                 Key: CASSANDRA-9302
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9302
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Jonathan Ellis
>            Assignee: David Kua
>             Fix For: 2.1.x
>
>
> We've had some discussion moving to Spark CSV import for bulk load in 3.x, but people
need a good bulk load tool now.  One option is to add a separate Java bulk load tool (CASSANDRA-9048),
but if we can match that performance from cqlsh I would prefer to leave COPY FROM as the preferred
option to which we point people, rather than adding more tools that need to be supported indefinitely.
> Previous work on COPY FROM optimization was done in CASSANDRA-7405 and CASSANDRA-8225.



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