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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-13170) Allow block cache to be external
Date Fri, 27 Mar 2015 20:21:53 GMT

     [ https://issues.apache.org/jira/browse/HBASE-13170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Elliott Clark updated HBASE-13170:
       Resolution: Fixed
    Fix Version/s: 2.0.0
     Release Note: HBase can use memcached as an external block cache. To use this change
your config to set hbase.blockcache.use.external to true and hbase.cache.memcached.servers
to contain the list of memcached servers to use.
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

pushed to branch-1 and master. Thanks for the reviews everyone.

> Allow block cache to be external
> --------------------------------
>                 Key: HBASE-13170
>                 URL: https://issues.apache.org/jira/browse/HBASE-13170
>             Project: HBase
>          Issue Type: New Feature
>          Components: io
>    Affects Versions: 2.0.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>             Fix For: 2.0.0, 1.1.0
>         Attachments: HBASE-13170-v1.patch, HBASE-13170-v2.patch, HBASE-13170-v3.patch,
HBASE-13170-v4.patch, HBASE-13170-v5.patch, HBASE-13170.patch
> Allow an external service to provide the block cache. This has the nice property of allowing
failover/upgrades to happen without causing a fully cold cache.
> Additionally this allows read replicas to share some of the same memory.

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