vMotion

Read locality in VSAN stretched cluster

Many regular readers will know that we do not do read locality in Virtual SAN. For VSAN, it has always been a trade-off of networking vs. storage latency. Let [...]

When and why do we “stun” a virtual machine?

This is a question that seems to come up regularly, but I don't think it appears in any great detail in external facing documentation. The question is "when do [...]

vSphere 6.0 Storage Features Part 5: Virtual Volumes

I pushed this post out a bit as I know that there is a huge amount of information out there around virtual volumes already. This must be one of the most [...]

vSphere 6.0 Storage Features Part 3: MSCS Improvements

OK - not storage improvements per-se, but I got into the habit of documenting our Microsoft Clustering Services (MSCS) improvements some time back, and habits [...]

A closer look at vSphere Flash Read Cache – vFRC

I was going to make this part 11 of my vSphere 5.5 Storage Enhancements series, but I thought that since this is such a major enhancement to storage in vSphere [...]

vSphere 5.5 Storage Enhancement Part 7 – LUN ID/RDM Restriction Lifted

About a year ago I wrote an article stating that Raw Device Mappings (RDM) continued to rely on LUN IDs, and that if you wished to successfully vMotion a [...]

What happens when VMFS heap depletes completely?

I've blogged about the VMFS heap situation numerous times now already. However, a question that I frequently get asked is what actual happens when heap runs [...]