Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Fri, Sep 23, 2011 at 12:34 PM, Felix Frank <ff at mpexnet.de> wrote: > Hi, > > On 09/23/2011 06:29 PM, Mark Deneen wrote: >> I didn't analyze it much, but with our hardware here I found little >> performance difference between partition based and file based VM >> storage. Ours are exported over iscsi-scst if that makes a >> difference. > > I believe it does. > > If your VMs use iSCSI bases storage, the network is likely your > bottleneck (does iSCSI support Infiniband?). > > When your VM sits directly atop DRBD, hopefully your disks are the > bottleneck. Image based virtual disks add a layer of indirection, as the > host system needs to handle the file operations. > > Again, for some workloads, this may not be much of an issue. Felix, In this situation the network was faster than the disks, which were rather slow. Mark