Am 6/23/25 um 22:37 schrieb Ryan Sleeth:
I am setting up my first cluster of 9-nodes each with 8x 20T HDDs and 2x 2T
NVMes. I plan to partition the NVMes into 5x 300G so that one partition can
be used by cephfs_metadata (SSD only), while the other 4x partitions will
be paired as db devices for 4x of the HDDs.
Check if the NVMe devices support multiple namespaces.
https://narasimhan-v.github.io/2020/06/12/Managing-NVMe-Namespaces.html
This way the kernel sees two block devices for each NVMe controller.
This makes it easier with the cephadm orchestrator to deploy NVMe OSDs
on the one namespace block device and the RocksDB volumes on the other.
Regards
--
Robert Sander
Linux Consultant
Heinlein Consulting GmbH
Schwedter Str. 8/9b, 10119 Berlin
https://www.heinlein-support.de
Tel: +49 30 405051 - 0
Fax: +49 30 405051 - 19
Amtsgericht Berlin-Charlottenburg - HRB 220009 B
Geschäftsführer: Peer Heinlein - Sitz: Berlin
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