Here is a selection of VirtuCache FAQ's...


Can I use excess RAM to test VirtuCache?

Absolutely. Simply download VirtuCache, install it and use existing RAM to prove the superior performance. No changes to your SAN or applications is required.


Which is better SSD or NVMe?

NVMe for a small additional investment delivers substantially better performance.


How many SSD/NVMe do I need per host?

One per host. If you need more capacity, you can RAID together multiple SSD's.


Why do I need two SSD/NMVe?

Resilience and redundancy is everything when dealing with your data. During a WRITE, to ensure data is not lost, we deliver resilience and redundancy by having a second SSD/NVMe in a second host in the VMware cluster. Data is synchronously written to both SSD/NVMe as this avoids data loss in the event of a server or SSD/NVMe device failing. In the background, data is then written to your SAN storage appliance or the VirtuStor appliance..


How large should my SSD/NVMe be?

The objective is to have all your active or recently written data residing in the SSD/NVMe on the host. Typically 5% to 20% of data is active. As a rule of thumb, having your SSD/NVMe to 10% of your data set size delivers exceptional performance improvement.


I don't have budget - can I still fully test VirtuCache?

Yes, Simply download and install VirtuCache. Use existing spare RAM on your Hosts to test and validate that VirtuCache delivers superior performance. This enables a zero cost 30 day full test and validation of VirtuCache.


Can VirtuCache help improve my VDI performance?

Absolutely. VDI is often plagued by slow response and boot times. This is usually due to the overall latency of the data path over network and storage and back again. VirtuCache solves the storage latency issues in VDI deployments by automatically caching frequently and recently used data from LUNs being used by desktop VMs to a SSD that the customer installs in the ESXi Host. All Horizon View VDI features are seamlessly supported including Linked Clones, persistent and non persistent VDI, Instant Clones, AppVolumes, and vGPU.


Can VirtuCache speedup by P2V migration Process?

If you have not yet virtualized your physical servers due only to perceived storage performance issues in VMs, then deploying VirtuCache will help. Since VirtuCache caches frequently used reads and all recent writes to in-host SSD and/or in-host RAM, from any back-end storage appliance, the storage performance from within a VM will now be considerably higher than from within your existing physical Linux or Windows server. As a result, P2V of database servers and other storage IO intensive applications is a big use case for VirtuCache.


Does VirtuCache support VMware Replication?

Yes. VMware vSphere Replication is functionality in VMware that allows Vmware customers to replicate their VMs to another location for disaster recovery purposes.
vSphere replication can work standalone or along with VMware Site Recovery Manager.
vSphere replication uses agents in ESXi hosts to track changed blocks using internal vSCSI interfaces in VMware and convey these changed blocks to the remote location. vSphere replication virtual appliances at both primary and DR locations co-ordinate this process.

VirtuCache fully supports vSphere Replication running in a standalone fashion or along with SRM and without any administrative overhead.


Does VirtuCache support Veeam and other backup software for VMware?

Yes, VirtuCache provides a “quiescing” feature for integration with backup solutions like Veeam, Commvault, etc. This ensures that VMs are transitioned to write-though caching mode and cached data is synced before the snapshots are issued for the backup / replication jobs. It also allows the VMs to be transitioned back to their originally configured policy after the backup / replication job finishes.