Den fre 23 aug. 2024 kl 18:30 skrev Phong Tran Thanh <tranphong079@gmail.com>:
This is my first time setting up a Ceph cluster for OpenStack. Will running both the Mon service and the OSD service on the same node affect maintenance or upgrades in the future? While running Mon, MDS, and OSD services on the same node does offer some benefits, could someone provide me with additional advice?
OSDs can use HUGE amounts of ram when doing internal consistency checks and things like that, so co locating the mon(s) with the OSDs would mean the host can end up swapping or even dying from lack of RAM, and while the machine is heading this way the mon part will probably not run well either, so the OSDs could starve the mon and you would be having two problems at the same time if this ever occurs. -- May the most significant bit of your life be positive.