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https://issues.apache.org/jira/browse/HBASE-4018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13053646#comment-13053646
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Todd Lipcon commented on HBASE-4018:
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I don't imagine the Java client will support domain sockets, since they don't
exist in Java.
I agree it's worth looking at all these options in parallel and doing some
shootouts to at least understand the performance differences.
> Attach memcached as secondary block cache to regionserver
> ---------------------------------------------------------
>
> Key: HBASE-4018
> URL: https://issues.apache.org/jira/browse/HBASE-4018
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Li Pi
> Assignee: Li Pi
>
> Currently, block caches are limited by heap size, which is limited by garbage
> collection times in Java.
> We can get around this by using memcached w/JNI as a secondary block cache.
> This should be faster than the linux file system's caching, and allow us to
> very quickly gain access to a high quality slab allocated cache.
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