Good day, folks!
Since System Center 2012 SP1 Beta was released last week, we’re super excited to receive raving interests & feedback just over the past few days.
I’d like to briefly talk about one of the major investment areas in System Center 2012 SP1 Virtual Machine Manager - overall system scalability and performance, and what changes you can expect.
To enable your VMM environment to scale up to hundreds of hosts and thousands of VMs, and at the same time, to make our system and your admin console experience “snappy”, we’ve made some significant improvements in how VMM reacts to changes.
At the same time, in order to increase our scale support and server performance, we’ve relaxed cadence for some refreshers. For definition and purpose of each refresher, check out this post. Below is a table to show what has changed:
Default Run Frequency
System Center 2012
System Center 2012 SP1
No change, except change in Hyper-V service will be reflected immediately.
VM “Light” Refresher
This refresher is turned off for Hyper-V hosts that are capable of supporting WMI eventing.
For system that does not support eventing, we fall back to the System Center 2012 behavior (2 minutes refresher model). But the overall VMM scale support will also fall back to System Center 2012 RTM level.
VM “Full” Refresher
Relaxed the cadence of this refresher. Users will need to trigger refresh action for VM property changes made outside of VMM, if you need to see those changes in VMM within 24 hours.
For system that does not support eventing, we fall back to the System Center 2012 behavior (30 minutes refresher model). But the overall VMM scale support will also fall back to System Center 2012 RTM level.
Storage “Light” Refresher
Refresher reads information in cache instead of performing deep discovery of storage devices.
Note: There is no change in Cluster Refresher, Library Refresher, Perf Refresher, VirtualCenter Refresher, User Role Refresher, PRO Tip Refresher and Storage Full Refresher. Check this post for what they do and how frequent they run.
Now, what does this mean to you and what can you expect from this set of changes?
As always, I’d love to hear your feedback on our SP1 Beta release and hope this information is helpful.