Yes you should definitely create different pools for different HDD types. Another decision you need to make is whether you want dedicated nodes for SSD or want to mix them in the same node. You need to ensure you have sufficient CPU and fat enough network links to get the most out of your SSD's.
You can add multiple data pools to Cephfs so if you can identify the hot and cold data in your dataset you could do "manual" tiering as an alternative to using a cache tier.
18TB is a relatively small capacity, have you considered an all-SSD cluster?
On Sun, Jun 26, 2016 at 10:18 AM, EM - SC <eyal.marantenboim@xxxxxxxxxxxx> wrote:
Hi,
I'm new to ceph and in the mailing list, so hello all!
I'm testing ceph and the plan is to migrate our current 18TB storage
(zfs/nfs) to ceph. This will be using CephFS and mounted in our backend
application.
We are also planning on using virtualisation (opennebula) with rbd for
images and, if it makes sense, use rbd for our oracle server.
My question is about pools.
For what I read, I should create different pools for different HD speed
(SAS, SSD, etc).
- What else should I consider for creating pools?
- should I create different pools for rbd, cephfs, etc?
thanks in advanced,
em
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