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SAN X16 iSCSI performance
Hi,
I’m trying to configure an SNS X16 running iSanMp clients on win XP pro SP2. I’m using Small Tree with Broadcom 57 1 gigabit cards and microsofts iscsi initiator on the clients. The X16 is running a Raid 10 split to 3 partitions and the max random write performance benchmark is 28Mbsec @1024kb with 32MB T.U – on 1 TCP port – that sucks for 16 disks!.
There are 2 clients running Pinnacle Liquid Edition – 2 simultaneous ingests cause the app or SAN to stutter and drop frames. How can I improve performance?
Raid 5 gives about 10Mb writes. Something is amiss. No one from SNS support seems to be able to help.
Anybody know of any bottlenecks in the registry editor?
Jumbo frames don’t help.
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5 Replies
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Phil,
After speaking on the phone we need to do a few things:
1. We need to re-initialize the globalSAN unit, using a supported configuration.
2. We need to check all cables that are being used.
3. Compare your benchmarks to ours, using the same benchmark utility.
4. Benchmarks aside, we must test the supported configuration with Video, looking at actual performance not just benchmarks.I have a tech contacting you to help get the system set up with a supported configuration. If you have any questions don’t hesitate to let me know, thanks.
Nate Cooper
ncooper@studionetworksolutions.com -
Hi Phil
Has this problem been fixed?
What benchmark numbers do you get now?
Thanks
Francois -
Hi,
The problem was with simultaneous capture on 2 clients, which turned out to be due to firewire and gigabit NIC sharing the same bandwidth on the PCI bus segment of one machine (66/100/133mhz).
The ONLY way I could get this to work on a HP xw8200 was to install an Adaptec 1394 card on the 133 bus.
All attempts at capture alone on 66/100/onboard or via a BOB on USB failed. So it was not just a question of separating these cards to each it’s own segment.I can now capture without frame dropping with the NIC on 100mhz & firewire on 133.
The X16 does about 30Mbyte random writes at 512KB &1Mbyte blocks, below this it does about 20.
Benchmark was with ATTO.
Thanks to Loring and Nate at SNS for the help.
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I forgot to add that the iSCSI is running from microsoft initiator on 1Ghz port.
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everything is fine. I finished my job there, no need for help now. Thanks, for checking up on this matter Francois.
Ben
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