I have 2 questions.

I want to use ceph for OpenStack's volume backend by creating 2 ceph pools.
One pool consists of osds on SSD, and the other consists of osds on HDD.
The storage capacity of SSD pool is much smaller than that of HDD pool,
so I want to make configuration not to stop all IO even if one osd on SSD becomes full.
Is this possible?

"osd full ratio" is default to 0.95, and if one osd becomes full, then all osd will stop. Is there any configuration to allow us to read-only while one or more osds are full?

best regards,

Atsumi Yoshihiko

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