Re: Ceph and hadoop (fstab insted of CephFS)

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On Tue, Feb 2, 2016 at 3:42 PM, Jose M <soloninguno@xxxxxxxxxxx> wrote:
> Hi,
>
>
> One simple question, in the ceph docs says that to use Ceph as an HDFS
> replacement, I can use the CephFs Hadoop plugin
> (http://docs.ceph.com/docs/master/cephfs/hadoop/).
>
>
> What I would like to know if instead of using the plugin, I can mount ceph
> in fstab and then point hdfs dirs (namenode, datanode, etc) to this mounted
> "ceph" dirs, instead of native local dirs.
>
> I understand that maybe will involve more configuration steps (configuring
> fstab in each node), but will this work? Is there any problem with this type
> of configuration?

Without being a big HDFS expert, it seems like you would be
essentially putting one distributed filesystem on top of another
distributed filesystem.  I don't know if you're going to find anything
that breaks as such, but it's probably not a good idea.

John

>
> Thanks in advance,
>
>
>
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