Category Archive for: ‘VirtuCache’

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 accelerate both reads and writes, Infinio accelerates only reads. A few others are - with us you can apply caching policy at the datastore and/or VM level versus only at the VM level with Infinio; we accelerate creation of VMs, snapshots, and other VMware kernel operations, which they don't. More details in the table below. Virtunet Systems Infinio Accelerates both reads and writes.1 Accelerates only reads. By not caching writes, not only are writes...

VMware’s vFlash Read Cache (VFRC) versus Virtunet’s Read+Write Caching

The biggest difference is that we cache reads and writes, VMware's VFRC caches only reads. Caching writes improves the performance of not only writes, but also of reads, and even in a read dominated workload.1 Then there are other differences as well – With VFRC, the in-host SSD has to be carved out amongst VMs and capacity manually assigned to each VMDK.2 Such manual assignment of cache capacity on a per VM basis is not required with VirtuCache; With VFRC, if a host fails or even...

How to Select SSDs for Host Side Caching for VMware – Type, Model, Size, Source and Raid Level ?

Go with enterprise grade and not consumer grade SATA SSDs. And deploy the SSD behind a good Raid controller (queue depth > 128). Samsung SM863a and Intel S4600 are good choices (as of 2018). Also, don't skimp on the Raid controller since you don't want it to choke before the SSD does. Though this article is in the context of using SSDs with VirtuCache (our Host Side Caching software for VMware that improves the performance of any SAN based storage appliance), these principles apply to the...