Standalone (Physical) installed Windows 2008 Server with iSCSI initiator in MPIO mode.
VmWare ESXi 4.1 with iSCSI-exported storage in MPIO mode (round-robin policy iops=3), with previous standalone Win2008 Server, converted to virtual, so I can test storage in two modes:
As virtual disk from esxi's iSCSI-connected datastore
As "direct" connection to SAN vSwitch, so I could use native Windows iSCSI initiator from virtual machine.
So results are below, and I hope it will be interesting for all:
SERVER: Supermicro 6016T-NTRF, X8DTU-F, Xeon E5620, 16Gb RAM, Intel E1G44HT I340-T4 Quad Gigabit NIC (82580)
STORAGE: Supermicro CSE-836E16-R1200B, X8DTH-iF, 2x Xeon E5506, 16Gb RAM, 8x2Tb Hitachi 7k2000 SATA, 80Gb Intel X25-M SSD, Intel E1G44HT I340-T4 Quad Gigabit NIC (82580)
STORAGE: TrinityNAS (based on NexentaStor), RAIDZ2 pool, SSD cache
Jumbo frames is on everythere.
Tested on Iometer 1.1.0 with OpenPerformance32.icf pattern (see http://vmktree.org/iometer/, widely used in VmWare Community "Open unofficial storage performance thread")
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