If you need to improve performance, moving the journal and RocksDB to an NVMe device can double IOPS and reduce latency. On Thu., Mar. 16, 2023, 7:16 p.m. Murilo Morais, <murilo@evocorp.com.br> wrote:
Good evening everyone!
Guys, what to expect latency for RBD images in a cluster with only HDD (36 HDDs)?
Sometimes I see that the write latency is around 2-5 ms in some images even with very low IOPS and bandwidth while the read latency is around 0.2-0.7 ms. For a cluster with only HDD is this latency expected? Is there any parameter I can study to improve? What do you recommend for tuning in the OS?
The latency between machines is always around 0.1ms, all connected via fiber optics.
Thanks in advance! _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io