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https://issues.apache.org/jira/browse/CASSANDRA-2038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-2038:
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Attachment: 2038-v2.txt
v2 generalizes to allow optimizing local reads for any CL and for digest as
well as data reads, without having to special-case LocalFutures. it also
simplifies the message-sending to a single pass instead of message array
construction followed by re-iteration over them.
v2 is completely un-tested but the approach is promising. :)
> Add local read path back to StorageProxy
> ----------------------------------------
>
> Key: CASSANDRA-2038
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2038
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 0.7.1
> Reporter: T Jake Luciani
> Assignee: T Jake Luciani
> Fix For: 0.7.1
>
> Attachments: 0001-CASSANDRA-2038-reincorporate-local-reads.txt,
> 0002-CASSANDRA-2038-only-local-for-CL.ONE.txt, 2038-v2.txt
>
>
> CASSANDRA-982 removed the local read path optimization. Without this all
> local reads go through serialization and messaging. Avoiding this step
> improves local read performance > 50%
>
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