If I'm understanding you correctly, you want to have 2 different roots that pools can be made using. The first being entirely SSD storage. The second being HDD Storage with an SSD cache tier on top of it.
The above guide explains how to set up the HDD root and the SSD root. After that all you do is create a pool on the HDD root for RBDs, a pool on the SSD root for a cache tier to use with the HDD pool, and then a a pool on the SSD root for RBDs. There aren't actually a lot of use cases out there where using an SSD cache tier on top of an HDD RBD pool is what you really want. I would recommend testing this thoroughly and comparing your performance to just a standard HDD pool for RBDs without a cache tier.
On Thu, Aug 17, 2017 at 3:18 PM Oscar Segarra <oscar.segarra@xxxxxxxxx> wrote:
Hi,_______________________________________________Sorry guys, during theese days I'm asking a lot about how to distribute my data.I have two kinds of VM:1.- Management VMs (linux) --> Full SSD dedicated disks2.- Windows VM --> SSD + HHD (with tiering).I'm working on installing two clusters on the same host but I'm encountering lots of problems as named clusters look not be fully supported.In the same cluster, Is there any way to distribute my VMs as I like?Thanks a lot!Ó.
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