We tested Ceph 16.2.6, and indeed, the performances came back to what we expect for this cluster.
Luis Domingues ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Saturday, September 11th, 2021 at 9:55 AM, Luis Domingues <luis.doming...@proton.ch> wrote: > 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 ifedo...@suse.de > 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@ceph.io > > > > > > To unsubscribe send an email to ceph-users-le...@ceph.io > > > > ceph-users mailing list -- ceph-users@ceph.io > > > > To unsubscribe send an email to ceph-users-le...@ceph.io > > ceph-users mailing list -- ceph-users@ceph.io > > To unsubscribe send an email to ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
