[pve-devel] less cores more iops / speed

[Stefan Priebe]

Am 11.11.2012 12:12, schrieb Alexandre DERUMIER:
> If I remember good, stefan can achieve 100.000 iops with iscsi with same kvm host.

Correct but this was always with scsi-generic and I/O multipathing on 
host. rbd does not support scsi-generic ;-(

> I have checked ceph mailing, stefan seem to have resolved his problem with dual core with bios update !
Correct. So speed on Dual Xeon is now 14.000 IOP/s and 18.000 IOP/s on 
Single Xeon. But the difference is an issue of the CPU Speed. 3,6Ghz 
Single Xeon vs. 2.5Ghz Dual Xeon.

Right now RBD in KVM is limited by CPU speed.

Greets,
Stefan