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https://issues.apache.org/jira/browse/HBASE-288?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12609180#action_12609180
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Joonbok Lee commented on HBASE-288:
-----------------------------------
I'm trying to apply this patch to Hbase 1.3. v7 patch has only the HBase parts
and seems not to be works with previous patch's hdfs part (sequenceFile and
mapFile part). v7 patch use not MapFile.Reader( ..., blocksize,
maxBlockCacheSize) but MapFile.Reader( ..., blockCacheEnabled) . Could you
upload v7 patch file including hdfs parts?
> Add in-memory caching of data
> -----------------------------
>
> Key: HBASE-288
> URL: https://issues.apache.org/jira/browse/HBASE-288
> Project: Hadoop HBase
> Issue Type: Bug
> Components: regionserver
> Reporter: Jim Kellerman
> Assignee: Tom White
> Priority: Trivial
> Fix For: 0.2.0
>
> Attachments: commons-collections-3.2.jar, hadoop-blockcache-v2.patch,
> hadoop-blockcache-v3.patch, hadoop-blockcache-v4.1.patch,
> hadoop-blockcache-v4.patch, hadoop-blockcache-v5.patch,
> hadoop-blockcache-v6.patch, hadoop-blockcache-v7.patch,
> hadoop-blockcache.patch
>
>
> Bigtable provides two in-memory caches: one for row/column data and one for
> disk block caches.
> The size of each cache should be configurable, data should be loaded lazily,
> and the cache managed by an LRU mechanism.
> One complication of the block cache is that all data is read through a
> SequenceFile.Reader which ultimately reads data off of disk via a RPC proxy
> for ClientProtocol. This would imply that the block caching would have to be
> pushed down to either the DFSClient or SequenceFile.Reader
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