On Wednesday 23 July 2008 11:08:48 Zavodsky, Daniel (GE Money) wrote: > What exactly do you intend to do? > If you want to compare using NFS directly in the guest via the network > VS using NFS in Dom0 and propagating a simple file on it to a guest via > the block layer, I'd strongly suggest you not do the latter. The > performance penalty of such a setup would be considerably more than 20%, > I'd say more like 40%. I haven't tried NFS but the penalty of using > simple files on GFS/SAN and exporting them to a DomU is in that range. > In PV DomUs, network I/O performance is pretty good. What we want to compare is not mapping any loopback device up to DomU but we want to compare the performance of mounting a nfs-share in DomU to using a raw blockdevices which resides on iSCSI in Dom0 and directly map the /dev/sd? to DomU. That second approach eliminates the IP-Stack in DomU and the first approach uses it.
We would prefer NFS for the ease of use but are a little confused because of performance considerations. -- Gruss / Regards, Marc Grimme http://www.atix.de/ http://www.open-sharedroot.org/ _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
