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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1580) Add interface for generic Write Ahead Logging mechanisms
Date Wed, 30 Mar 2011 16:34:06 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13013534#comment-13013534
] 

Todd Lipcon commented on HDFS-1580:
-----------------------------------

I'm not sure about TxnRecord - if not done carefully it will cause an extra memory copy on
all the writes, which isn't free. I like modularity, but we will have to carefully benchmark
if we make that change.

> Add interface for generic Write Ahead Logging mechanisms
> --------------------------------------------------------
>
>                 Key: HDFS-1580
>                 URL: https://issues.apache.org/jira/browse/HDFS-1580
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Ivan Kelly
>         Attachments: HDFS-1580+1521.diff, HDFS-1580.diff, generic_wal_iface.pdf, generic_wal_iface.pdf,
generic_wal_iface.pdf, generic_wal_iface.txt
>
>


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