Local Read rate is 720 MByte/s / Write Test rises an error.
I am Testing NFS and iSCSI
Network Configuration:
2 Bond's a' 2*1 Gbit Ethernet
The other Side is a ESXi 5.5 with 2*1 Gbit Ethernet
(same Hardware with 1 local SSD and 64 GByte RAM)
Now the Problem:
I am running iSCSI with Round-Robin Policy over two nics with ip adresses in different subnets. With a copy Job from ssd to iscsi i see only 48 MByte Transfer-rate (round-Robin works fine i see 2 times 24 MByte over the two vmknic).
With NFS i got 60 MByte over one wire!!!
I tried the same configuration with a Windows 2008R2 VM with I/O Meter (2 CPUs, 4 GByte RAM and 60 GByte disk with a 40 GByte I/O Meter Test-File).
- The result is equal -> nfs is round about 50% quicker then iscsi - iops and, per second and better Response time 1,9 MS nfs and 2,7 iscsi)
I take a look on the dss7 console for Performance issues but the console shows 10% cpu load and 4% Memory usage???
Try with the changes to the Target and Initiator again with the ESX server and see if this helps.
1- one LUN per target
2- make the following changes to the targets, and initiator your ESXi 5.5:
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1. From the console, press CTRL+ALT+W,
2. Select Tuning options -> iSCSI daemon options -> Target options,
3. Select the target in question,
4. change the values to the maximum required data size (change the initiator to match).