[ceph-users] PGs get placed in the same datacenter (Trying to make a hybrid NVMe/HDD pool with 6 servers, 2 in each datacenter)

Дробышевский, Владимир vlad at itgorod.ru
Sat Oct 7 10:36:19 PDT 2017


2017-10-07 19:12 GMT+05:00 Peter Linder <peter.linder at fiberdirekt.se>:

The idea is to select an nvme osd, and
> then select the rest from hdd osds in different datacenters (see crush
> map below for hierarchy).
> It's a little bit aside of the question, but why do you want to mix SSDs
and HDDs in the same pool? Do you have read-intensive workload and going to
use primary-affinity to get all reads from nvme?

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