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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-842) Serialize NN edits log as avro records
Date Tue, 12 Jan 2010 18:47:54 GMT

    [ https://issues.apache.org/jira/browse/HDFS-842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12799315#action_12799315
] 

Eli Collins commented on HDFS-842:
----------------------------------

That's what I thought (cpu bound on object deserialization) but over in HDFS-855 it sounds
like it's IO bound, at least at facebook. Yea, was just thinking we'd do parallel load/save
for now. 

> Serialize NN edits log as avro records
> --------------------------------------
>
>                 Key: HDFS-842
>                 URL: https://issues.apache.org/jira/browse/HDFS-842
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: name-node
>            Reporter: Todd Lipcon
>
> Right now, the edits log is a mishmash of ad-hoc serialization and Writables. Switching
it over to Avro records would be really useful for operator tools - an "offline edits viewer"
would become trivial ("avrocat")

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