And here is the disk information that we base our testing: HPE EG1200FDJYT 1.2TB 10kRPM 2.5in SAS-6G Enterprise On Sun, Jan 16, 2022 at 11:23 AM Behzad Khoshbakhti <khoshbakhtib@xxxxxxxxx> wrote: > Hi all, > > We are curious about the single disk performance which we experience > performance degradation when the disk is controlled via Ceph. > > Problem description: > We are curious about the Ceph write performance and we have found that > when we request data to be written via Ceph, it is not using full disk > potential. > > Detailed (somehow) problem description: > Disk size: 1.2 TB > Ceph version: Pacific > Block size: 4 MB > Operation: Sequential write > Replication factor: 1 > Direct disk performance: 245 MB/s > Ceph controlled disk performance: 80 MB/s > > It is worth mentioning that the Ceph pool is instructed to use a single > OSD with a replication factor of 1. > In terms of networking of Ceph, the Ceph client is connected to the Ceph > OSD via a 10Gbps Network adapter within the same switch under 1ms latency. > > Sorry for asking this dummy question as I know there are numerous > parameters affecting the performance. I wonder if you could help us to get > this issue resolved. > > Regards, > Behzad > -- Regards Behzad Khoshbakhti Computer Network Engineer (CCIE #58887) +48789397639 _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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