Category Archive for: ‘Competitive Differentiators’

GUI comparison, PernixData FVP vs Us – VMware Write Back Caching Software.

For the most part both our GUI and workflows are similar. This article compares, with screenshots, steps to install and configure VirtuCache and PernixData FVP. The only differences between us and Pernix stem from the fact that we leverage VMware's own capability in the areas of clustering, license management, and logging, whereas Pernix programmed these features separately within their software. Overall these additional screens add a few clicks and pages in Pernix versus us, but again I...

PernixData’s FVP vs. Virtunet – Both VMware Kernel Write Caching Software

More similar than different Both us and PernixData differentiate from rest of the host side caching vendors in similar ways - that we are kernel mode software; both of us cache writes in addition to reads; have data protection strategies in place to prevent against data loss in case of multiple simultaneous hardware failure; do not require networking or storage to be reconfigured; and do not require agents per VM or VM per host. This article is the first in a series of two articles that...

Infinio’s Read Caching versus Virtunet’s Read+Write Caching Software

The biggest difference is that we cache reads and writes, Infinio caches only reads. Even in a read dominated workload, caching writes helps accelerate even the reads. The below article explains how this is so. Then there are other differences as well like we assign caching policies at the datastore level with VM level overide, whereas Infinio caches at the VM level only. We cache both VM IO and VMware kernel IO whereas Infinio caches only VM IO. The implications of such differences between...

EMC Fast Cache Storage Controller Based Caching for VNX Appliances versus VirtuCache Host Side Caching for Any SAN based Appliance

In case of FastCache or any storage appliance based caching, the SSD is more expensive than if the same SSD were bought retail. Also the SSD performs better in the host than in the storage appliance, since the SSD in the appliance is constrained by the network and controller. EMC FastCache is SSD based caching functionality sold by EMC for their VNX appliances. It tiers frequently used data, mainly reads, to SSDs in the appliance from slower HDDs on the appliance. VirtuCache is...

VirtuCache Helped Reduce Storage Capex at a SaaS Provider

VirtuCache accelerates storage appliances to the same extent regardless of whether they have faster SAS hard drives or slower SATA drives, and regardless of the age and speed of SAN. Thus we help postpone a SAN upgrade, or if the customer is looking at a capacity upgrade, selecting an appliance with cheaper SATA hard drives would suffice. We save them capex dollars either way.


Virtunet’s Write-Back (Read+Write) Caching Competing with Write-Through (Read-Only) Caching at a Large School District

Host side caching software needs to accelerate both reads and writes especially in light of increasing competition from all-flash arrays. Caching writes is important even for workloads that are read intensive. If we were not to accelerate writes, the reads behind the writes on the same thread will not be accelerated, thus slowing reads as well. Using TPC-C benchmark, we showed 2x improvement in performance versus a read caching software vendor at a large...

An Order of Magnitude Improvement in IOPS and Latencies using SQLIO Benchmark

Performance Benchmark using SQLIO that compares Storage I/O with and without VirtuCache