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@xxxxxxxxxxxxxx> 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@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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