I'm trying to find a proper way to gauge the cache effectiveness in real terms with a real guest VM workload. The definitive measurement for guest VM responsiveness and disk IO issues is disk latency. The differences above between the local node and the remote node can definitely be felt when naviga...

I'm guessing there has to be something wrong with my configuration. Attached are two disk latency perfmon captures of installing a new Server 2012 VM from initial boot, to fully patching up to date from our WSUS server. First test is read/write latency on local disk: HyperVHost1LocalDisk2012Install....

Here is a link to the full bench-marking results as requested above. https://www.dropbox.com/s/wj3zo3ajd0ezqe0/Full%20Benchmarking%20Results.xlsx I'm still looking through all the results, but there are some definite bottlenecks going on when comparing iSCSI over single and multiple nodes, and the l...

Thanks Anton. I'll also have the IOMeter results ready in a few hours when I get to work. Takes a while to get through that many tests, but really the only way to see any bottlenecks.

I'm disconnecting and removing all the targets from the 3 nodes, but every time I remove a target, the StarWind Management Console stops responding, then crashes, and then the Starwind service stops. I had this happen once before during testing, but it's happened three times now as I've tried to rem...

I've done similar tests as per the Benchmarks Best Practices document, but I'll run them again to be configured using the exact workers you specified above. While I'm doing this, can I get a bit of insight into how the Starwind Write-Back cache is used and what sort of performance should be expected...

Also another performance related question. When I do a 4k random write test in IOMETER across all 3 nodes, I get about 27k IOPS @ 106MB/s. Is this around the expected write performance for the Starwind memory based write cache? This test only utilised around 30% of the two 1GBE iSCSI NICs, where I w...

Updated version fixed the problem Anatoly. After upgrading each node, I made the same changes to the config, and this time the service started back up properly.

Thanks for the quick response.

https://www.dropbox.com/s/rsnry0yzdmwpm ... ation.evtx
https://www.dropbox.com/s/oy1j0bxjshh66fj/System.evtx

Will install the update now.

Yes, I have run those Anatoly. Please note that the IOPS for the 4k Random Read was after 20 mins, allowing the Cachecade hot tables to populate enough for getting a majority SSD hits, hence 77k IOPS off 4 x 1TB 7200RPM drives. Also note that the last IOMeter test was using a cold, cool, warm, hot w...

Sure thing Anatoly.

Just an added note. This was a single sync request for one of our 4x1TB Raid0 devices in Starwind. I have another 3 of these 4TB arrays on each node. I manually started the sync on the other 3 nodes, and I'm seeing the Sync channel usage go up to around 430mb per 10GBE NIC, so around 40% utilisation...

I'm not sure if I should throw all my different question in one thread, but as there wasn't a definitive thread that I could find regarding my issue, I thought I'd throw it up as a separate one. We've got our new portential production starwind environment built and configured and currently doing ben...

In the meantime, I've got it all set up and benchmarking properly without that setting, so is it absolutely needed?

Isn't that the starwind-20130826-091208.txt file in the Zip?