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From "Brandon Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3313) create a protocol for journal service synchronziation
Date Wed, 25 Apr 2012 00:42:07 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3313?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Brandon Li updated HDFS-3313:
-----------------------------

    Attachment: HDFS-3313.HDFS-3092.patch

{quote}We should not change NameNodeProxies. NN is not involved in journal synchronization.{quote}
fixed by creating a static method in JournalService to get the roc proxy. 
{quote}For the same reason, the principals in JournalSyncProtocolPB should not be Namenode.{quote}
Replaced with Journal User Name
{quote}Use FSEditLog.getEditLogManifest(long fromTxId) instead of FileJournalManager and don't
change FileJournalManager.{quote}
done.
{quote}Why DN is related to JournalSyncProtocol? Please check the comments.{quote}
fixed.
{quote}I think we should pass JournalInfo in getEditLogManifest(..) so that it could first
verify the version, namespace id, etc.{quote}
done.
{quote}Why the test is commented out?{quote}
fixed. 
                
> create a protocol for journal service synchronziation  
> -------------------------------------------------------
>
>                 Key: HDFS-3313
>                 URL: https://issues.apache.org/jira/browse/HDFS-3313
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>         Attachments: HDFS-3313.HDFS-3092.patch, HDFS-3313.HDFS-3092.patch
>
>
> This protocol is used to synchronize lagging journal service with active journal service
with complete finalized edit segments. Currently it supports one rpc call getEditLogManifest()
which lists finalized edit segments.

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