Re: [ceph-users] cephfs best practice

2015-10-21 Thread Gregory Farnum 
On Wed, Oct 21, 2015 at 3:12 PM, Erming Pei  wrote:
> Hi,
>
>   I am just wondering which use case is better: (within one single file
> system) set up one data pool for each project, or let project to share a big
> pool?

I don't think anybody has that kind of operational experience. I think
that if your projects have distinct requirements it might be worth
giving them their own pool, and right now individual pools are the
only way to enforce RADOS-level access controls or storage quotas. But
other than that I'd probably stick with just one pool.
-Greg
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Re: [ceph-users] cephfs best practice

2015-10-21 Thread John Spray 
On Wed, Oct 21, 2015 at 11:12 PM, Erming Pei  wrote:
> Hi,
>
>   I am just wondering which use case is better: (within one single file
> system) set up one data pool for each project, or let project to share a big
> pool?

In general you want to use a single data pool.  Using multiple pools
is only useful if the pools will be somehow different, like being on
different hardware (ssds vs hdds, etc), having different replica count
etc.

John
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