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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-1108) ability to create a file whose newly allocated blocks are automatically persisted immediately
Date Wed, 17 Nov 2010 01:57:14 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1108?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

dhruba borthakur updated HDFS-1108:
-----------------------------------

    Status: Open  (was: Patch Available)

Can you pl merge patch with latest trunk and post it on review board, thanks.

> ability to create a file whose newly allocated blocks are automatically persisted immediately
> ---------------------------------------------------------------------------------------------
>
>                 Key: HDFS-1108
>                 URL: https://issues.apache.org/jira/browse/HDFS-1108
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>            Reporter: dhruba borthakur
>            Assignee: Dmytro Molkov
>         Attachments: HDFS-1108.patch
>
>
> The current HDFS design says that newly allocated blocks for a file are not persisted
in the NN transaction log when the block is allocated. Instead, a hflush() or a close() on
the file persists the blocks into the transaction log. It would be nice if we can immediately
persist newly allocated blocks (as soon as they are allocated) for specific files.

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