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HDFS >> mail # user >> RE: dfs.datanode.du.reserved


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RE: dfs.datanode.du.reserved
Thanks for the reply. This sounds like it has potential, but also seems to be a rather duct-tape type of work around. It would be nice if there was a mod to dfs.datanode.du.reserved that worked within Hadoop, so that would imply that hadoop was a little more certain to adhere to it.
I understand that dfs.datanode.du.reserved defines reservd storage on each volume. I would like to give each volume a different reserved value.
An example: <name>dfs.datanode.du.reserved</name>
   <value>///hstore1/dfs/dn:161061273600,///hstore2/dfs/dn:53687091200</value>Or something similiar. thanks
John
Date: Wed, 6 Mar 2013 10:25:17 +0100
Subject: Re: dfs.datanode.du.reserved
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]

Not that I know. If so you should be able to identify each volume and as of now this isn't the case.
BUT it can be done without Hadoop knowing about it, at the OS level, using different partitions/mounts for datanode and jobtracker stuff. That should solve your problem.
Regards

Bertrand

On Mon, Mar 4, 2013 at 10:26 PM, John Meza <[EMAIL PROTECTED]> wrote:
I'm probably not being clear.this seems to describe it: dfs.datanode.du.reserved  configured per-volume.
https://issues.apache.org/jira/browse/HDFS-1564
thanksJohn
From: [EMAIL PROTECTED]
Date: Mon, 4 Mar 2013 15:37:36 -0500
Subject: Re: dfs.datanode.du.reserved
To: [EMAIL PROTECTED]
Possible to reserve 0 from various testing I have done yet that could cause the obvious side effect of achieving zero disk space:) Have only tested in development environment, however. Yet there are various tuning white papers and other benchmarks where the very same has been tested.
Thanks.

On Mon, Mar 4, 2013 at 2:00 PM, John Meza <[EMAIL PROTECTED]> wrote:
the parameter: dfs.datanode.du.reserved is used to reserve disk space PER datanode. Is it possible to reserve a different amount of disk space per DISK?

thanks
John    

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John Meza 2013-03-07, 16:30
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB