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From "Luca Telloli (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-397) Incorporate storage directories into EditLogFileInput/Output streams
Date Sat, 11 Jul 2009 09:25:14 GMT

    [ https://issues.apache.org/jira/browse/HDFS-397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12729964#action_12729964
] 

Luca Telloli commented on HDFS-397:
-----------------------------------

Raghu

1. the second piece of code is correct (at least for the purpose of the patch)
The first piece of code I guess should be also correct due to a name clash since 
{noformat}
private static final String STORAGE_JSPOOL_FILE = 
                                              NameNodeFile.EDITS_NEW.getName();
{noformat}

I assumed it's correct since it passed the unit tests correctly. 

2. in HDFS-311, for instance every time a constructor for a Input/Output stream is called,
this patch matters. 
Have a look for instance to line 1497 and following. 

Finally, I think one advantage of this patch is that I achieve to avoid calling unnecessary
constructors for Input/Output streams, 
which in previous code belonged to the necessity of strictly keeping the order of streams
and the order of storage directories in sync. 



> Incorporate storage directories into EditLogFileInput/Output streams
> --------------------------------------------------------------------
>
>                 Key: HDFS-397
>                 URL: https://issues.apache.org/jira/browse/HDFS-397
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Luca Telloli
>            Assignee: Luca Telloli
>         Attachments: HADOOP-6001.patch, HADOOP-6001.patch, HADOOP-6001.patch, HDFS-397.patch
>
>


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