CEPH is a popular open source storage software. However it exhibits high write latencies. VirtuCache caches CEPH volumes to in-host SSDs and by doing so reduces VM level latencies considerably.
Virtunet’s services and software helped migrate CPSI EMR software from physical hardware to virtual. Our quote for P2V and enterprise wide hardware refresh for KVH hospital in rural Washington was comparable to the quote from CPSI for just the CPSI HIS hardware upgrade.
Virtunet Write-Back Caching Improves the Performance of EMC VNX Appliance Without Requiring Any Appliance or SAN Upgrade
EMC’s VNX appliances have 3 shortcomings that VirtuCache fixes without touching the SAN and Appliance,
- They are expensive in terms of $/IOPS
- Even the high-end VNX 7500 can accommodate only 2TB of SSDs per appliance
- SSDs in the VNX that are used for tiering data from HDDs do not cache writes, hence writes are not accelerated
There are two ways to improve the performance of VNX. One is to install EMC’s FastCache SSDs in the appliance, the other is to use VirtuCache host side caching software to cache data from VNX to in-host SSDs.
San Jose, California, USA
May 23, 2015
Virtunet Systems' VirtuCache Clustered Caching Software that accelerates storage performance of any older SAN based storage appliance, by caching frequently used data to any SSD in the VMware host, is now certified by VMware under its PVSP program as attested by the below link: