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Date: Thu, 20 Dec 2012 15:39:12 +0000 (UTC)
From: "ramkrishna.s.vasudevan (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12624815.1356010648233.36840.1356017952726@arcas>
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Subject: [jira] [Commented] (HBASE-7404) Bucket Cache:A solution about
 CMS,Heap Fragment and Big Cache on HBASE
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    [ https://issues.apache.org/jira/browse/HBASE-7404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13537087#comment-13537087 ] 

ramkrishna.s.vasudevan commented on HBASE-7404:
-----------------------------------------------

@Chunhui
So you are back with a bang. :)
Some terms in that test result YGC, YGCT? Sorry if am ignorant.  Do you mean Young Generation here?
                
> Bucket Cache:A solution about CMS,Heap Fragment and Big Cache on HBASE
> ----------------------------------------------------------------------
>
>                 Key: HBASE-7404
>                 URL: https://issues.apache.org/jira/browse/HBASE-7404
>             Project: HBase
>          Issue Type: New Feature
>    Affects Versions: 0.94.3
>            Reporter: chunhui shen
>            Assignee: chunhui shen
>             Fix For: 0.96.0, 0.94.5
>
>         Attachments: BucketCache.pdf, hbase-7404-0.94v1.patch, hbase-7404-trunkv1.patch
>
>
> First, thanks @neil from Fusion-IO share the source code.
> What's Bucket Cache? 
> It could greatly decrease CMS and heap fragment by GC
> It support a large cache space for High Read Performance by using high speed disk like Fusion-io
> 1.An implementation of block cache like LruBlockCache
> 2.Self manage blocks' storage position through Bucket Allocator
> 3.The cached blocks could be stored in the memory or file system
> 4.Bucket Cache could be used as a mainly block cache(see CombinedBlockCache), combined with LruBlockCache to decrease CMS and fragment by GC.
> 5.BucketCache also could be used as a secondary cache(e.g. using Fusionio to store block) to enlarge cache space
> See more in the attachment and in the patch

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