Re: Ceph Architecture and File Management

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On Thu, Jan 7, 2016 at 9:28 PM, James Gallagher
<james.np.gallagher@xxxxxxxxx> wrote:
> Hi,
>
> I'm looking to create a Ceph storage architecture to store files, I'm
> particularly interested in the metadata segregation so would be implementing
> the Ceph Storage Cluster to start, with CephFS added once done. I'm
> wondering what the best approach to storing data would be, for example,
> consider the following topology:
>
>
> admin node - mds/mon
>                    osd1
>                    osd2
>
> I'm also looking to have three client devices which would basically be
> normal end user desktop users, (A, B and C)
>
> Now, my understanding so far, is that in order to store files, you use the
> rados put command on the admin node, to move files from the admin node to
> the OSDs.
>
> How would I move files from the three client devices to the OSDs in the most
> simplistic way possible? Obviously, transferring data physically between
> desktop computers and the admin-node will not be feasible in real world
> application? Any suggested methods?

I think you've picked up a misconception of how all this works
somewhere.  Do not attempt to use RADOS directly for normal use cases.
Use one of CephFS, RBD or RGW.  These all have their own ways for you
to connect from client machines to access stored data.  For example,
with CephFS you simply mount the filesystem on the client and access
files within your mount point, just like a NFS mount.

John
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