I was told by someone at Red Hat that ISCSI performance is still several magnitudes behind using the client / driver.
Thanks, -Drew -----Original Message----- From: Nathan Fish <lordci...@gmail.com> Sent: Thursday, October 24, 2019 1:27 PM To: Ryan <rswago...@gmail.com> Cc: ceph-users <ceph-us...@ceph.com> Subject: [ceph-users] Re: iSCSI write performance Are you using Erasure Coding or replication? What is your crush rule? What SSDs and CPUs? Does each OSD use 100% of a core or more when writing? On Thu, Oct 24, 2019 at 1:22 PM Ryan <rswago...@gmail.com> wrote: > > I'm in the process of testing the iscsi target feature of ceph. The cluster > is running ceph 14.2.4 and ceph-iscsi 3.3. It consists of 5 hosts with 12 SSD > OSDs per host. Some basic testing moving VMs to a ceph backed datastore is > only showing 60MB/s transfers. However moving these back off the datastore is > fast at 200-300MB/s. > > What should I be looking at to track down the write performance issue? In > comparison with the Nimble Storage arrays I can see 200-300MB/s in both > directions. > > Thanks, > Ryan > _______________________________________________ > 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
