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https://issues.apache.org/jira/browse/CASSANDRA-1434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12911018#action_12911018
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Jonathan Ellis commented on CASSANDRA-1434:
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Had a look at 02. Still don't understand your objection to using Multimap --
use ListMultimap if you want to preserve ordering. It's noticeably cleaner
than Map<X, List<Y>>, and the Guava guys are very careful about performance.
Also, 02 kind of abuses an executor when a map of threads would be clearer as
to what is going on, while not requiring much more code. "Send this message"
is a good task to submit to an executor; "run an infinite loop pulling messages
off a public queue" is not.
> ColumnFamilyOutputFormat performs blocking writes for large batches
> -------------------------------------------------------------------
>
> Key: CASSANDRA-1434
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1434
> Project: Cassandra
> Issue Type: Bug
> Components: Hadoop
> Reporter: Stu Hood
> Assignee: Stu Hood
> Fix For: 0.7 beta 2
>
> Attachments:
> 0001-Switch-away-from-Multimap-and-fix-regression-introdu.patch,
> 0002-Improve-concurrency-and-add-basic-retries-by-attempt.patch
>
>
> By default, ColumnFamilyOutputFormat batches
> {{mapreduce.output.columnfamilyoutputformat.batch.threshold}} or
> {{Long.MAX_VALUE}} mutations, and then performs a blocking write.
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