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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1979) HDFS-1073: Fix backupnode for new edits/image layout
Date Thu, 14 Jul 2011 16:59:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13065385#comment-13065385

Todd Lipcon commented on HDFS-1979:

bq. Should setStorageInfo also setBlockPoolID and setClusterID? Eg in BN#registerWith where
we call all three I'm wondering why those aren't a single method.

Yes, I tried a couple times to do this, but it doesn't quite work because of the inheritance
structure. Since this is a carryover from the existing code, mind if we leave as is for now?

bq. In FSIMage#getLastAppliedTxId why return editLog.getLastWrittenTxId()? It seems like this
method is for asking for the last tx from loading the image/edits log (a static property),
if someone wants the the last tx written to the edits log (dynamic) they should use that API

That seems reasonable. Let me try to fix that and upload a new patch.

bq. Why does LogLoadPlan() call super()?
Oversight. Fixed.

bq. BackupNodeProtocol isAlive and startLogSegment need javadocs
It turns out isAlive wasn't being called, so I removed it for now. Fixed javadoc for startLogSegment

bq. FSNamesystem#registerBackupNode params could use a comment/better names to distinguish
which registration is which (eg bnReg, nnReg)


bq. BN "Is journal spooling in progress" comment should be replaced with a new description

> HDFS-1073: Fix backupnode for new edits/image layout
> ----------------------------------------------------
>                 Key: HDFS-1979
>                 URL: https://issues.apache.org/jira/browse/HDFS-1979
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-1979-prelim.txt, hdfs-1979.txt, hdfs-1979.txt

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