Here's a clean "dd" test of two identical KVM guests that shows how results differ (NFS vs LVM):
1) First guest inside qcow2 image, located on NFS share (via 10gbit ethernet), cache settings "Default (No cache)": $ dd if=/dev/zero of=test bs=64k count=150k conv=fdatasync 153600+0 records in 153600+0 records out 10066329600 bytes (10 GB) copied, 196.993 s, 51.1 MB/s 2) Second guest runs inside LVM-over-iSCSI logical volume, from the same storage server, via same as first guest 10gbit ethernet, cache settings "Default (No cache)": $ dd if=/dev/zero of=test bs=64k count=150k conv=fdatasync 153600+0 records in 153600+0 records out 10066329600 bytes (10 GB) copied, 58.474 s, 172 MB/s Mikhail. _______________________________________________ pve-user mailing list [email protected] http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
