@starneo The numbers are good. I get about half those numbers using 2 NICs with MPIO. A single connection should give you about 120-125MB/sec maximum (and only with sizes above 512K.) So, basically, with MPIO, you should multiply those numbers by the number of NICs. Congrats! You're there with your ...

Now everything is running really smooth and quite fast. I have done a ATTO diskbenchmark on all 4 CSV HA targets simultaniously (queue depth=10, 2GB size) and received 26000 I/Os at the Starwind Performance Monitor (overall). I know physically this is not passible (for our Storages), but with over ...

Thanks for the input! Currenty both options are enabled (I thought this was written in a white paper). I have to change the TcpAckFrequency in the registry, too. That's quite difficult, because this is a productive system. Will the change of the RSS & Chimney setting interrupt the iSCSI Sesseio...

@starneo, Did you follow the ACK recommendations along with the global chimney ones? If not, perform the following commands: netsh int tcp set global chimney=disabled netsh int tcp set global rss=disabled Verify the settings with this command: netsh int tcp show Also, be sure to have disabled the RS...

I just upgraded to v5.7 and redid all testing. Node 1 exhibits good performance throughout now, so I'm happy. Now it's node 2 that worries me. Performance testing (ATTO) gives the same weird performance dip around 1K and 2K. I mean REAL dips. Node1.png Node2.png Is there something I may have overloo...

The system is using a PERC 5/E adapter, which has 256MB DDR2 memory for its cache. It is enabled, but I don't know how much this 256MB will help. And yes, it's battery-backed and the write policy is write-back. How did you set disk cache policy? Using a similar MD1000 + Perc-5/E Setup I disabled it...

With any other version?

The PERC 5/E doesn't support RAID6, so I won't be able to do that.

Besides that, how can I change the cache of existing volumes within Starwind?

The system is using a PERC 5/E adapter, which has 256MB DDR2 memory for its cache.

It is enabled, but I don't know how much this 256MB will help.

And yes, it's battery-backed and the write policy is write-back.

That's the thing.
I'm using a single server SAN.

I also upgraded from a lower version, so I cannot change cache settings.
(Or at least, I don't know how or where to do so.)

I also cannot remove my current volumes and recreate them.

Please advise.

George

I will schedule downtime to do the upgrade this weekend.

The system is using RAID-5.

When I'm done, I will post the screenshots.

George

I won't submit a crash report. The software version I'm using is v5.6.1690. I kept doing tests and I'm now getting numbers in the 910-930 range. Please note that I'm doing the tests while one node is online. I need to schedule downtime to perform clean tests. This might also influence the numbers. I...

*** Update *** Today, the one node that is active, crashed uglily! The Cluster Resource failed, bringing the whole system down. I don't know yet what exactly happened. Since the system was down anyway, I decided to do the Delayed ACK modifications, as indicated in the above post. I also downloaded I...

I have done NTttcp during a support session, so it should still be there. If I can remember right, we got satisfactory results on that one, but I shall run it again during nighttime. As for Iperf, I have not done this one yet. I can download it and check it out and post the results. If there are spe...

Hi All, I did not give up or resolve the issue for that matter. The problem is still there, although at the time, I managed to stabilize the system somewhat. (Yes, the problems are surfacing more and more again.) I kept troubleshooting the storage problems, which led to MPIO being one of the compone...