More recent versions of Microsoft operating systems contain the ability to detect if they are running virtualized or not. This is accomplished through the checking of a CPUID hypervisor-present bit presented by the VMware virtual hardware. Since virtual hardware 7, VMware has implemented this interface, which is required by the Microsoft SVVP program.
However, as Microsoft continues to change and update its specifications, lets look at a specific behavior in which virtual machine performance can be impacted by the operating system accessing a time source inefficiently. Continue reading →
There is a lot of outdated information regarding the use of a vSphere feature that changes the presentation of logical processors for a virtual machine, into a specific socket and core configuration. This advanced setting is commonly known as corespersocket.
It was originally intended to address licensing issues where some operating systems had limitations on the number of sockets that could be used, but did not limit core count.
It’s often been said that this change of processor presentation does not affect performance, but it may impact performance by influencing the sizing and presentation of virtual NUMA to the guest operating system. Continue reading →
I previously mentioned performance changes in vSphere Replication 5.5, and in this post I’ll take a look at some of the things our tireless engineers in development have done to make things much quicker for replication within this newest release.
The changes they’ve made fall into three main areas:
Improved buffering algorithms at the source hosts resulting in better read performance with less load on the host and better network transfer performance
More efficient TCP algorithms at the source site resulting in better latency handling
More efficient buffering algorithms at the target site resulting in better write performance with less load on the host
VMware, along with our partner HP, are excited to announce the world’s first TPC-VMS benchmark result!
Many organizations and their operations teams are still not confident that databases can be virtualized successfully. It has been VMware’s experience though that performance should no longer be a barrier to continued adoption of database workloads on vSphere. By leveraging this 3rd party, audited benchmark, we hope to increase customer confidence that vSphere is the best platform for all your enterprise applications.
The 2013 VMware Fling Contest is now open. Do you have an idea on how certain features or functionality could be improved upon? Can you think of an app that would make the life of a system administrator so much easier? Do you have a repetitive task that you wished you could have automated in your vSphere environment? Or a decision making tool for certain tasks? We are looking for you, our customers & users, to propose ideas for new VMware Flings. Our panel of judges will pick the winner. The submitter of the winning entry will win a free pass to VMworld 2014.
Last year we got over 120 submissions. We’re also planning to release a new Fling (Proactive DRS) at VMworld that was built based on last year’s winning winning idea.
Finally a shout out to our final session the Extreme Performance Series focused on Flash! Flash is changing how traditional storage is leveraged and consumed so you won’t want to miss this breakout on what VMware is doing. Continue reading →
People are madly registering for VMworld sessions as the 10 year anniversary of the conference opens in less than 2 weeks. I highly recommend this next session in the Extreme Performance Series Continue reading →
Next in our Extreme Performance Series mini-track, I’d like to highlight the following vCenter performance breakout. Remember, you’ll want to attend the whole series to learn about performance across the stack.