Recommendations for a Large SAN for Virtualization

Fri Feb 11, 2011 10:14 am

880 megabits per second is a moderate result for 1 NIC. So for now 1) turn all TCP stack optimizations OFF 2) Turn back to non-teamed configuration and try to squeeze 950-980 megabits from one NIC. Installing latest drivers and playing with Jumbo frame size (4K or 9K).

oxyi wrote:

Network speed went down through the teaming network adapter.

I did the TCPIP registry thing -

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
GlobalMaxTcpWindowSize = 0x01400000 (DWORD)
TcpWindowSize = 0x01400000 (DWORD)
Tcp1323Opts = 3 (DWORD)
SackOpts = 1 (DWORD

and

I have the Intel Pro/1000 PT QuadPort, and I have the teaming set on
IEEE 802.3ad Dyanmic Link Aggregation. Any thought? It just doesn't seem like I'd reach that 1.6GB speed..

oxyi · Mon Feb 14, 2011 4:34 pm

Just reporting back.

The 880megabites per second is on teamed NIC card.

I did turn off all TCP stack optimization, un-teamed the NIC, and installed latest driver and Jumbo frame size set at 4k. I was able to get about 930 megabites from a single NIC. But when I teamed them again, I am not even able to reach over 900 megabites at all. Any possible theory on that ?

Thanks!

Mon Feb 14, 2011 7:44 pm

This means hardware vendor NIC teaming implementation just sucks... So for now please leave NICs as un-teamed and configure StarWind to use second NIC as alternative path. With upcoming V5.7 (1.5 - 2 months from now) we're going to represent our custom teaming for both performance and redundancy an solve this problem once and forever.

oxyi wrote:Just reporting back.

The 880megabites per second is on teamed NIC card.

I did turn off all TCP stack optimization, un-teamed the NIC, and installed latest driver and Jumbo frame size set at 4k. I was able to get about 930 megabites from a single NIC. But when I teamed them again, I am not even able to reach over 900 megabites at all. Any possible theory on that ?

Thanks!

oxyi · Tue Feb 22, 2011 11:23 pm

Got it.

Two questions

Will snapshot function ever be implemented for HA?

Would you be able to send me the preset IOmeter configuration file for testing the 64kb access specification ? I am testing the RAM disk now.

Thanks.

Wed Feb 23, 2011 9:45 am

Snapshots +HA are scheduled for 6.0
As for the IOmeter config file - drop us a letter to support@starwindsoftware.com and I will send you the appropriate icf file.