Hi Ashish,

Yep, that would be the correct way to do it.

If you already have a cluster running, a ceph -s will also show usage, ie
like:

>ceph -s
pgmap v1842777: 8064 pgs: 8064 active+clean; 1069 GB data, 2144 GB used,
7930 GB / 10074 GB avail; 3569B/s wr, 0op/s

This is a small test-cluster with 2x replica, 1TB data used and roughly 2x
the amount used.

Also 'rados df' will show usage pr. pool :)

Cheers,
Martin




On Wed, Mar 13, 2013 at 11:15 AM, Ashish Kumar <[email protected]> wrote:

> Hi Guys,****
>
> ** **
>
> Just want to know, how can I calculate the capacity of my ceph cluster.  I
> don't know whether a simple RAID system calculation will work or not.****
>
> ** **
>
> I have 5 servers each with the storage of 2TB and there are three copies
> of data, will it be ok to calculate the capacity in following way:****
>
> ** **
>
> 5(servers)* 2TB/3. ****
>
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> ** **
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