I have just uploaded Release 2.9 of the online VDI Flash Calculator supporting vSphere 5.1, adding new features and preparing the foundation for next VMware View features.
– Increased number of allowed VMs per CPU/Core to 20
– Added support for manual CBRC Base % IOP savings
– Added support for vSphere and vCenter 5.1
– Added framework to support future VMware View features
– Added validation according to VMware compatibility matrix
– Fixed layout issues
CBRC Base % IOP savings – VMware View Storage Accelerator uses a vSphere feature called CBRC (Content Based Read Cache). If you are not familiar with View Accelerator, read about it in my previous articles Understanding CBRC (Content Based Read Cache) and Understanding CBRC – RecomputeDigest Method. The IO reduction provided by CBRC average 65%, but the mileage may vary depending on the numbers of similar images and applications running in a given host. The calculator now allows architects to define what % savings is considered the maximum possible IO savings. Based on this number and the amount of CBRC RAM assigned to the host the calculator will provide the IO savings closer to the real number.
If you are not familiar with analyzing CBRC statistics leave it at 65%. For more information on CBRC statists please refer to William Lam’s article New Hidden CBRC (Content-Based Read Cache) Feature in vSphere 5 & for VMware View 5?, and look for dcacheStats.
Check out the VDI calculator training video. You can find the video at http://myvirtualcloud.net/?p=2551
Check out the manual to help you to better use the VDI Flash Calculator. The manual can be found at http://myvirtualcloud.net/?p=1927.
The VDI calculator can be found at http://myvirtualcloud.net/?page_id=1076. Alternatively, go to my blog homepage and select VDI Calculator on the top bar.
This article was first published by Andre Leibovici (@andreleibovici) at myvirtualcloud.net.