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2011 Mar 29
0
Poor IO performance in hosts and VMs - XCP 1.0 b42052
Dear list, I am battling with rather grave performance issues in the 42052 build of XCP 1.0. Specifically, this concerns disk IO both on the host and in the VMs. I have tested the connectivity to the NFS/iSCSI server that backs the whole platform (Nexenta, SSD ZIL/l2arc, striping over 9 5-disk zraid1), and from a clean Ubuntu install, I am able to saturate the network both over NFS and iSCSI before the storage starts struggling. Furthermore, raw network has been tested to/from Ubuntu installs, XCP hosts and VMs - I do lose the expected 3% pure network speed as soon as a VM is involved, but apa...