Might be totally wrong here, but it’s not layering them but replacing hdfs:// URLs with ceph:// URLs so all the mapreduce/spark/hbase/whatever is on top can use CephFS directly which is not a bad thing to do (if it works) :-)
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 beessentially putting one distributed filesystem on top of anotherdistributed filesystem. I don't know if you're going to find anythingthat breaks as such, but it's probably not a good idea.John
Thanks in advance,
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