Are you duplicating the traffic over the same physical network by relaying through the VM, rather than writing directly to network storage, thereby halving the write performance?
Assuming you're on a GigE network, are all the network devices running in full duplex? Just some guesses based on the fact that the throughput is almost exactly half. *Steve Dainard * IT Infrastructure Manager Miovision <http://miovision.com/> | *Rethink Traffic* 519-513-2407 ex.250 877-646-8476 (toll-free) *Blog <http://miovision.com/blog> | **LinkedIn<https://www.linkedin.com/company/miovision-technologies> | Twitter <https://twitter.com/miovision> | Facebook<https://www.facebook.com/miovision> * ------------------------------ Miovision Technologies Inc. | 148 Manitou Drive, Suite 101, Kitchener, ON, Canada | N2C 1L3 This e-mail may contain information that is privileged or confidential. If you are not the intended recipient, please delete the e-mail and any attachments and notify us immediately. On Thu, Sep 26, 2013 at 5:23 AM, Stefano Stagnaro <stefa...@prisma-eng.com>wrote: > Hello, > > I'm testing oVirt 3.3 with GlusterFS libgfapi back-end. I'm using a node > for engine and one for VDSM. From the VMs I'm mounting a second GlusterFS > volume on a third storage server. > > I'm experiencing very bad transfer rates (38MB/s) writing from a client to > a VM on the mounted GlusterFS. On the other hand, from the VM itself I can > move a big file from the root vda (libgfapi) to the mounted GlusterFS at > 70MB/s. > > I can't really figure out where the bottleneck could be. I'm using only > the default ovirtmgmt network. > > Thank you for your help, any hint will be appreciated. > > Regards, > -- > Stefano Stagnaro > IT Manager > > Prisma Engineering S.r.l. > Via Petrocchi, 4 > 20127 Milano – Italy > > Tel. 02 26113507 int 339 > e-mail: stefa...@prisma-eng.com > skype: stefano.stagnaro > > > > > _______________________________________________ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users >
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