Hi Igor, I have a SSD for the physical DB volume. And indeed it has very high utilisation during the benchmark. I will test 16.2.6. Thanks, Luis Domingues ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Friday, September 10th, 2021 at 5:57 PM, Igor Fedotov <ifedotov@xxxxxxx> wrote: > Hi Luis, > > some chances that you're hit by https://tracker.ceph.com/issues/52089. > > What is your physical DB volume configuration - are there fast > > standalone disks for that? If so are they showing high utilization > > during the benchmark? > > It makes sense to try 16.2.6 once available - would the problem go away? > > Thanks, > > Igor > > On 9/5/2021 8:45 PM, Luis Domingues wrote: > > > Hello, > > > > I run a test cluster of 3 machines with 24 HDDs each, running bare-metal on CentOS 8. Long story short, I can have a bandwidth of ~ 1'200 MB/s when I do a rados bench, writing objects of 128k, when the cluster is installed with Nautilus. > > > > When I upgrade the cluster to Pacific, (using ceph-ansible to deploy and/or upgrade), my performances drop to ~400 MB/s of bandwidth doing the same rados bench. > > > > I am kind of clueless on what makes the performance drop so much. Does someone have some ideas where I can dig to find the root of this difference? > > > > Thanks, > > > > Luis Domingues > > > > 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 _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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