On 12/21/2013 07:53 PM, shacky wrote:
Hi.
I am trying to understand how much space available I will get on my Ceph
cluster if I will use three servers with 4x4Tb hard drives each.
I all depends on the replication level you use, but let's assume 3.
So you get the capacity of one machine.
4 * 1000 * 1000 / 1024 /1024 = 3.81TB
This would result in 15.24TB of raw space per machine, so 45TB of raw
capacity in the cluster.
You probably shouldn't fill the disks over 80% just to be safe. So with
3x replication you have 12.2TB of usable storage.
Wido
Thank you very much!
Bye.
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Wido den Hollander
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