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From "Stefania (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-9302) Optimize cqlsh COPY FROM, part 3
Date Mon, 30 Nov 2015 08:10:11 GMT


Stefania commented on CASSANDRA-9302:

I've implemented three more things:

* tests with failure injection, in a fashion similar to CASSANDRA-9304 - pull request is [here|].

* manual replica selection rather than relying on the driver TAR - we get better performance
because we can batch by replica, not just by primary key.

* ingest_rate parameter to control how many rows per second we feed to the worker processes
- this is required by CASSANDRA-9303 but it made sense to change it here.

> Optimize cqlsh COPY FROM, part 3
> --------------------------------
>                 Key: CASSANDRA-9302
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Jonathan Ellis
>            Assignee: Stefania
>            Priority: Critical
>             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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