Thanks Remo, Agree’d, ephemeral will pretty much always be faster, I’m seeing orders of magnitude difference between the 2, at times. After a bunch of testing, I’m pretty convinced its not KVM/QEMU or iscsi configurations, it’s looking like its something with my 3par configuration. Initially thought it may just be a function of growing a sparce volume, but running IO tests multiple times, I still get inconsistent results.
Anyway, thanks for the reply.. JC Jim Colestock jcolest...@gmail.com <mailto:jcolest...@gmail.com> > On Jan 12, 2018, at 11:18 AM, Remo Mattei <r...@italy1.com> wrote: > > I think that ephemeral will always be faster than iscsi. We do use PURE on > 10GB even though it’s fast but local is faster. > > Remo > >> On Jan 12, 2018, at 6:27 AM, Jimmy Colestock <jcolest...@gmail.com >> <mailto:jcolest...@gmail.com>> wrote: >> >> Hello All, >> >> Fighting an issue with cinder iscsi performance being much slow than local >> ephemeral disk. We’re running multi-path with dual 10Gb nic, offloading is >> working and bandwidth across the links is minimal. I’ve looked at kernel >> schedulers in the VM’s and tried them all. >> >> I still need to dig into the storage side (3Par), but just curious if anyone >> has any suggestions while I keep troubleshooting. >> >> Thanks for any help. >> >> JC >> >> >> Jim Colestock >> jcolest...@gmail.com <mailto:jcolest...@gmail.com> >> https://www.linkedin.com/in/jcolestock/ >> <https://www.linkedin.com/in/jcolestock/> >> _______________________________________________ >> Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack> >> Post to : openstack@lists.openstack.org >> <mailto:openstack@lists.openstack.org> >> Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack> >
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