Thanks, Mark. I’m interested as well, wanting to provide block service to baremetal hosts; iSCSI seems to be the classic way to do that.
I know there’s some work on MS Windows RBD code, but I’m uncertain if it’s production-worthy, and if RBD namespaces suffice for tenant isolation — and are themselves mature. Thoughts anyone? > I don't have super recent results, but we do have some test data from last > year looking at kernel rbd, rbd-nbd, rbd+tcmu, fuse, etc: > > > https://docs.google.com/spreadsheets/d/1oJZ036QDbJQgv2gXts1oKKhMOKXrOI2XLTkvlsl9bUs/edit?usp=sharing > > > Generally speaking going through the tcmu layer was slower than kernel rbd or > librbd directly (sometimes by quite a bit!). There was also more client side > CPU usage per unit performance as well (which makes sense since there's > additional work being done). You may be able to get some of that performance > back with more clients as I do remember there being some issues with iodepth > and tcmu. The only setup that I remember being slower at the time though was > rbd-fuse which I don't think is even really maintained. > > > Mark > > > On 10/5/20 4:43 PM, dhils...@performair.com wrote: >> All; >> >> I've finally gotten around to setting up iSCSI gateways on my primary >> production cluster, and performance is terrible. >> >> We're talking 1/4 to 1/3 of our current solution. >> >> I see no evidence of network congestion on any involved network link. I see >> no evidence CPU or memory being a problem on any involved server (MON / OSD >> / gateway /client). >> >> What can I look at to tune this, preferably on the iSCSI gateways? >> >> Thank you, >> >> Dominic L. Hilsbos, MBA >> Director - Information Technology >> Perform Air International, Inc. >> dhils...@performair.com >> www.PerformAir.com >> >> _______________________________________________ >> 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
