frankdenneman

  Frank Denneman is the Chief Technologist for AI at VMware by Broadcom. He is an author of the vSphere host and clustering deep dive series, as well as a podcast host for the Unexplored Territory podcast. You can follow him on Twitter @frankdenneman

     



441 Stories by frankdenneman

VM to Hosts affinity rule

VMware vSphere 4.1 introduces a new affinity rule, called “Virtual Machines to Hosts” (VM-Host). This new rule is available in vSphere 4.1 DRS clusters...
4 min read

VMware Fault Tolerance and DPM

Some requirements of the design I am working on is to be as “green” as possible and to offer the highest level of redundancy...
39 sec read

Memory reclamation, when and how?

After discussing with Duncan the performance problem presented by @heiner_hardt , we discussed the exact moment the VMkernel decides which reclamation technique it will...
1 min read

Reservations and CPU scheduling

Most of my resource management articles focus more on the behavior of memory management than on CPU management. Mainly because the Memory scheduler within...
4 min read

Virtual Machine memory overhead

Every virtual machine running on an ESX host consumes some memory overhead additional to the current usage of its configured memory. This extra space...
1 min read

Re: Swapping

Recently we had a discussion about swapping, as Duncan mentioned in his article “Swapping” Swapped memory might not have impact on the performance of...
1 min read

Resource pools memory reservations

After publishing the article “impact of memory reservations” I received a lot of questions about setting memory reservation at resource pool level. It seems...
4 min read

VMware tools disk timeout value Linux GOS

After I posted the “VMtools increases TimeOutValue article” I received a lot of questions if the VMware Tools automatically adjust the timeout value for...
49 sec read

ESX4 ALUA, TPGS and HP CA

In my blog post: “HP CA and the use of LUN balancing scripts” I tried to cover the possible impact of using HP continuous...
6 min read

Identify storage performance issues

VMware has recently updated the kb article “ Using esxtop to identify storage performance issues Details” (KB1008205). The KB article provides information about how...
41 sec read