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From "Jonathan Gray (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1192) LRU-style map for the block cache
Date Tue, 17 Feb 2009 23:48:59 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Gray updated HBASE-1192:
---------------------------------

    Attachment: hbase-1192-v2.patch

Built from latest LruHashMap, this is a specialized version that only works for <String,ByteBuffer>

This is so we don't have to have wrapping classes that implement HeapSize for the key and
val (req for LruHashMap).

Needs testing but is expected to work, very few changes.

This patch has a dependency of latest HeapSize as posted in most recent HBASE-1186 v4 patch.

> 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: Jonathan Gray
>            Priority: Blocker
>             Fix For: 0.20.0
>
>         Attachments: hbase-1192-v1.patch, hbase-1192-v2.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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