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https://issues.apache.org/jira/browse/HBASE-1192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12705118#action_12705118
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Jonathan Gray commented on HBASE-1192:
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Shalin,
On the inside, it is very similar to a LinkedHashMap, just customized to be
memory-aware making use of our HeapSize interface. It turned out to be much
easier and more efficient to work with the data structures directly.
It is possible we will run in to contention issues. If we saw issues, my plan
was to add buckets a la ConcurrentHashMap.
Looking at the solr implementation, that looks like what you guys did! Very
cool.
I will read up on the issue and patch. Thanks Shalin!
> LRU-style map for the block cache
> ---------------------------------
>
> Key: HBASE-1192
> URL: https://issues.apache.org/jira/browse/HBASE-1192
> Project: Hadoop HBase
> Issue Type: New Feature
> Components: regionserver
> Reporter: Jonathan Gray
> Assignee: ryan rawson
> Priority: Blocker
> Fix For: 0.20.0
>
> Attachments: hbase-1192-v1.patch, hbase-1192-v2.patch,
> hbase-1192-v3.patch
>
>
> We need to decide what structure to use to back the block cache. The primary
> decision is whether to continue using SoftReferences or to build our own
> structure.
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