2) In HA all writes are executed TWICE. First write is issued by hypervisor to HA node 1 and then HA node 1 submits the same write to HA node 2 and only after it's completion whole storage cluster reports status "OK" to hypervisor. So for the same amount of time we need to move doubled da...

Ok, let me simplify the things: * ESXi 4.1 host connected a non-HA LUN (size: 2 GB, write-back cache: 4 GB) give me a performance of 117 MB/s in the VM. * ESXi 4.1 host connected a HA LUN (size: 2 GB, write-back cache: 4 GB) give me a performance of 47 MB/s in the VM. The graph of the synchronizatio...

I did some more tests and in all results the performance is limited by the synchronization link. With multipathing policy "Fixed" I didn't get no more than 50% usage in the sync link, which limits the performance about 47 MB/s. I tried the round robin multipathing policy, taking advantage ...

[quote="anton (staff)"]50 megabits or 50 megabytes per second? Sorry, 50 MB/s. The best result was precisely 47 MB/s and the worst 36 MB/s. The following command was executed on virtual machine: # dd if=/dev/zero of=test bs=1M oflag=direct bs=1M Bonnie++ shows the same results, and in all ...

Grab new Beta... We've probably doubled both reads and writes (and IOPs should jump over the head) in it. Checking some real life 10 GbE configs is what we'd be very interested in :) Thanks! I did tests with 5.5 build 20100831 and HA device connected to VMWare ESX 4.1, and the same problem persists...

anton (staff) wrote:Grab new Beta... We've probably doubled both reads and writes (and IOPs should jump over the head) in it. Checking some real life 10 GbE configs is what we'd be very interested in Thanks!

How can I get the new beta? I signed up for beta-testing program but have not received anything yet.

At the time it's super-stable and robust it limit the whole system with the HA cross-link performance. So if I have two storage arrays with local write performance of 400 MBps, connected by a 1 Gbit cross-link, theoretically the performance of a HA device should be approximately 112 MBps, and the c...

Both nodes have write-back cache enabled? We are testing a Starwind HA setup and are also having significant performance issues. Here are the details: - Starwind 5.4 - Windows 2008 R2 Standard - 02 storage boxes: Intel S3420GPLC, 3ware 9650SE-24M8, 24 HDs Western Digital WD5001AALS - Sync link usin...

We are testing a Starwind HA setup and are also having significant performance issues. Here are the details: - Starwind 5.4 - Windows 2008 R2 Standard - 02 storage boxes: Intel S3420GPLC, 3ware 9650SE-24M8, 24 HDs Western Digital WD5001AALS - Sync link using 02 cat6 crossover cables and Intel 82574L...