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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2293) Add the ability to set dfs.block.size for a given file from the command line
Date Sun, 28 Aug 2011 11:15:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13092457#comment-13092457

Uma Maheswara Rao G commented on HDFS-2293:


 sorry, you are right. looks it is working on trunk. I tested with Minidfscluster. Because
of this when it is trying to getFileSystem, it will return file system from cache. So, it
is taking defaults for me. In command line that will not be the case. Every time fs will be

Just i cleaned all fs objects in cache and executed commandline option & tried to set
block size to 120.

then it displays the below message:

put: io.bytes.per.checksum(512) and blockSize(120) do not match. blockSize should be a multiple
of io.bytes.per.checksum

So, it is proven that, block size is getting effected.

I will post the tests for this issue for more coverage.


> Add the ability to set dfs.block.size for a given file from the command line
> ----------------------------------------------------------------------------
>                 Key: HDFS-2293
>                 URL: https://issues.apache.org/jira/browse/HDFS-2293
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs client
>    Affects Versions: 0.23.0
>            Reporter: Aaron T. Myers
>            Assignee: Uma Maheswara Rao G
>              Labels: newbie
> See the thread [here|http://www.mail-archive.com/hdfs-user@hadoop.apache.org/msg01459.html],
in which Allen correctly points out that since dfs.block.size is a client-side config, one
could just set a different value in a custom HADOOP_CONF_DIR. We might as well make that easy.

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