using devices class when creating a pool

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Hi All,

I'm trying to use the devices class feature while creating the pool, but no luck.

I see the following section in the CRUSH map, but I can't find any documentation showing how to use it!

# devices

device 0 osd.0 class hdd

device 1 osd.1 class hdd

device 2 osd.2 class ssd

.
.
.

How to create a pool using certain filters (e.g. storage class, buckets, rack, etc...)?


Regards,
Bishoy Mikhael

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