Keep in mind that VSA is built on top of Redhat.  This means that the datamovers (usually dedicated hardware running DART software) are all running as services in the Redhat linux VM  The important part of this is that their IO and performance is dictated by Redhat's own caching/flushing/dirty algorithms and the backend disk.  The VSA itself can be used for many different purposes (mainly for demo of interface and capabiltiies) and tweaking to the Redhat OS has not been performed regarding memory optimization etc. and it may lead to less predictable operations in other areas.  If you are looking to get the best performance from the VSA, you can look into making Redhat cache and be as "gentle" as possible on your backend disk.  This means changing dirty cache settings, default swapping behavior etc.  There is plenty of information out there on how to optimize Redhat for IO which can directly relate to the VSA (see Oracle, etc on Redhat).  There are a few things that I have done that have improved the IO performance that you can try.  If there is an overall consensus that it helps and doesn't materially add risk to std operation then we could bring it in to the VSA's build.  However, it is important to mention that the tweaks that I am showing below could lead to more risk of data loss since more caching (in RAM) could be in effect which leads to less backend disk usage and better response times.   /sbin/swapoff -a  /etc/sysctl.conf - change dirty page info vm.dirty_background_ratio = 50 vm.dirty_ratio = 80  vm.swappiness=10 (instead of swapoff, just try swaps down)
After getting everything setup and replicating, I created an NFS datastore.  I'm seeing write latency on average of 800ms, with spikes to 3600ms.   It's living on a HP DL380G6 connected via FC to HP EVA 6000 with 15k FC disks.  Even when I move it to local SAS spindles, it's still cripplingly slow.   It doesn't like VLAN's, so the DM and the management are on the same VLAN.  I'm connected to Cisco 2960's at 1Gbps.  My VLAN's are trunked there.  What am I doing wrong?  This is unusable even in a lab.
Has anyone been able to actually use the Uber VSA 3.2?