I was just browsing through our documentation and stumbled on something which has got some cool potential. http://pubs.vmware.com/vsphere-50/index.jsp?topic=/com.vmware.vsphere.storage.doc_50/GUID-F78EB579-B11C-4E65-9EE3-145888A005F6.html This describes how to setup the vSphere side of things for a mirrored disk within a Windows 2008 Guest. Just imagine doing in-guest mirroring of your data while doing FT on the outside. This means you would be able to span multiple [...]
I received this Paper a while back and think it is an excellent read. I just copied a random part of the paper to give you an idea of what it covers. There’s not much more to say about it then just read it, it is as in-depth as it can get on FT. I read it several times by [...]
Yesterday I received an email from product management asking if I could plug the VMware FT/HA survey like I did with the VMware Snapshot survey. The VMware Snapshot survey literally had hundreds of responses with so much valuable feedback that they decided to re-open this survey and give you guys, my readers, the chance to speak your mind on VMware [...]
When vSphere was still in beta one of the requirements for using FT was to have hyperthreading disabled. For most people this wasn’t an issue as traditional hyperthreading usually did not improve performance and thus was disabled by default. However with the Nehalem all this changed. Of course I can’t guarantee a specific percentage of performance increase but increases of [...]
This is the whitepaper I’ve been waiting for. By now we all know that the CPU Scheduler has changed. The only problem is that there wasn’t any official documentation about what changed and where we would benefit. Well this has changed. VMware just published a new whitepaper titled “The CPU Scheduler in VMware® ESX™ 4“. The CPU scheduler in VMware [...]
William Lam did it again. He created a script that manages FT from the command line. The script is called ftCLI.pl and here are the details: Description: Managing VMware Fault Tolerance via the command line. Params: The following operations are supported: create|enable|disable|stop Requirement: vSphere vCenter 4.0 ESX(i) 4.0 Advanced, Enterprise, Enterprise Plus or Eval licensing Assumption: Your environment is FT [...]
A couple of days ago I linked to Mike D. response to Marathon’s blogs. Mike has updated his original blog article and added a second article which responds to another blog by Marathon. Those who are interested in the difference between Marathon’s and VMware’s products should definitely read it. Especially if you’ve only read the Marathon posts so far. Mike [...]
