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@xxxxxxxxx>:
Hi Kyriazis,
depends on the workload.
I would recommend to add ssd/nvme DB/WAL to each osd.
Joachim Kraftmayer
www.clyso.com
Hohenzollernstr. 27, 80801 Munich
Utting a. A. | HR: Augsburg | HRB: 25866 | USt. ID-Nr.: DE2754306
Kyriazis, George <george.kyriazis@xxxxxxxxx> 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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