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HDFS, mail # user - adding space on existing datanode ?


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Re: adding space on existing datanode ?
Jean-Marc Spaggiari 2013-02-22, 18:14
Hi Brice,

To add disk space to you datanode you simply need to add another drive,
then add it to the dfs.data.dir or dfs.datanode.data.dir entry. After a
datanode restart, hadoop will start to use it.

It will not balance the existing data between the directories. It will
continue to add to the 2. If one goes full, it will only continue with the
other one. If required, you can balance the data manually. Or depending on
your use case and the options you have, you can stop the datanode, delete
the content of the 2 data directories and restart it. It will stat to
receive data to duplicate and will share it evenly between the 2
directories. This last solution is not recommended. But for a test
environment it might be easier.

JM

2013/2/22 brice lecomte <[EMAIL PROTECTED]>

> Hello there,
> How to add disk space (ext3 partition, or nfs mount....) on an existing
> datanode ?
>
> Thanks,
> Brice
>