Hi George, the docs [0] strongly recommend to have dedicated SSD or NVMe OSDs for the metadata pool. You'll also benefit from dedicated DB/WAL devices. But as Joachim already stated, it depends on a couple of factors like the number of clients, the load they produce, file sizes etc. There's no easy answer. Regards, Eugen [0] https://docs.ceph.com/en/latest/cephfs/createfs/#creating-pools Zitat von Joachim Kraftmayer <joachim.kraftmayer@clyso.com>:
Hi Kyriazis,
depends on the workload. I would recommend to add ssd/nvme DB/WAL to each osd.
Joachim Kraftmayer
www.clyso.com
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Kyriazis, George <george.kyriazis@intel.com> schrieb am Mi., 2. Okt. 2024, 07:37:
Hello ceph-users,
I’ve been wondering…. I have a proxmox hdd-based cephfs pool with no DB/WAL drives. I also have ssd drives in this setup used for other pools.
What would increase the speed of the hdd-based cephfs more, and in what usage scenarios:
1. Adding ssd/nvme DB/WAL drives for each node 2. Moving the metadata pool for my cephfs to ssd 3. Increasing the performance of the network. I currently have 10gbe links.
It doesn’t look like the network is currently saturated, so I’m thinking (3) is not a solution. However, if I choose any of the other options, would I need to also upgrade the network so that the network does not become a bottleneck?
Thank you!
George
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