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From "Ravi Prakash (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2291) HA: Checkpointing in an HA setup
Date Mon, 29 Aug 2011 23:03:37 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2291?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13093287#comment-13093287
] 

Ravi Prakash commented on HDFS-2291:
------------------------------------

@Suresh: Thanks! Blame not the dev for what he read in docs outdated http://hadoop.apache.org/common/docs/current/hdfs_user_guide.html#Secondary+NameNode
:)
bq. It is usually run on a different machine than the primary NameNode since its memory requirements
are on the same order as the primary NameNode

> HA: Checkpointing in an HA setup
> --------------------------------
>
>                 Key: HDFS-2291
>                 URL: https://issues.apache.org/jira/browse/HDFS-2291
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Aaron T. Myers
>            Assignee: Todd Lipcon
>             Fix For: HA branch (HDFS-1623)
>
>
> We obviously need to create checkpoints when HA is enabled. One thought is to use a third,
dedicated checkpointing node in addition to the active and standby nodes. Another option would
be to make the standby capable of also performing the function of checkpointing.

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