30 Sep
2019
30 Sep
'19
3:25 a.m.
Hi,all we use openstack + ceph(hammer) in my production
Hammer is soooooo 2015.
There are 22 osds on a host and 11 osds share one ssd for osd journal.
I can’t imagine a scenario in which this strategy makes sense, the documentation and books are quite clear on why this is a bad idea. Assuming that your OSDs are HDD and the journal devices are SATA SSD, the journals are going to be a bottleneck, and you’re going to wear through them quickly. If you have a read-mostly workload, colocating them would be safer.
Hi，Anthony Thanks for you reply,Yes,we use sata ssd. where is the documentation or website of recommendation.