Virtualization, Cloud, Infrastructure and all that stuff in-between
My ramblings on the stuff that holds it all together
Category Archives: Performance
Comparing the I/O Performance of 2 or more Virtual Machines SSD, SATA & IOmeter
Posted by on November 19, 2009
I’m currently doing some work on SSD storage and virtual machines so I need an easy way of comparing I/O performance between a couple of virtual machines, each backed onto different types of storage. I normally use IOmeter for this kind of work but generally only in a standalone manner – i.e I can [...]
iSCSI LUN is very slow/no longer visible from vSphere host
Posted by on October 29, 2009
I encountered this situation in my home lab recently – to be honest I’m not exactly sure of the cause yet, but I think it was because of some excessive I/O from the large number of virtualized vSphere hosts and FT instances I have been using mixed with some scheduled storage vMotion – over [...]
Running ESX 3.5 and 3i Under VMWare Workstation 6.5 Beta Build 91182
Posted by on May 18, 2008
Following on from my earlier post I upgraded my installation to the new build of 6.5. it un-installed the old build and re-installed the latest without a problem, took about 30mins and required a reboot of the host OS. All my previously suspended XP/2003 VM’s resumed ok without a restart but needed an upgrade [...]
VMWare Server Performance – A Practical Example
Posted by on April 19, 2008
The following screen dump is from an HP DL380G5 server that runs all the core infrastructure under VMWare Server (the free one) for a friend’s company which I admin sometimes. It is housed in some co-lo space and runs the average range of Windows servers used by a small but global business, Exchange SQL, [...]
Performance Expectations on a Shared Virtual Platform
Posted by on March 12, 2008
Some interesting discussion linked-to within this article on Storagezilla. people using Amazon’s EC2 platform are complaining because they feel they are getting less performance than they should. Always an interesting point to bear in mind and useful in expectation setting for developers. You may want a dedicated CPU/core – but do you really need [...]
