Configuring vSphere Flash Read Cache

This article Configuring vSphere Flash Read Cache is taken from  virtualizationreview.com. It is definitely a good read. One of good features of VSphere 5.5 is the Flash Read Cache.

According to the article,

This capability allows a VMDK (the VMware virtual disk format) to have a "slice" of higher performing SSD storage without putting the entire contents on the SSD. This only applies to reads, but it can be a great way to get a big boost in I/O that is shared across multiple VMs.

The picture summarise it so well

 

Do read the article for an in-depth explanation.