All ESXi versions

15 Jun: Powershell scripts to move VMs to Write-Through before storage appliance snapshot starts and move VMs back to original caching policy after snapshot completes

Download the scripts from below link. Scripts that move VMs to Write-Through mode before controller snapshot is taken and revert VMs back to original caching policy after snapshot completes These scripts are only required if the below condition is true: [You use SAN controller snapshots to backup LUNs, without using any…

09 Apr: VirtuCache interoperability with Veeam, Zerto, Commvault, Avamar, AppAssure. Nakivo, Actifio and Tivoli backup and replication software

Backup software vendors use a few different types of architectures and VMware APIs. Additional configuration might be required in VirtuCache to accelerate backups, taking care that the backup data doesn’t evict ‘hot’ VM production data and that backups are application-consistent even when VirtuCache is in Write-Back mode. Backup software using…

18 Mar: One Page Installation and Configuration Instructions for VirtuCache

Terms to Note. ‘Write-through’ caching policy in VirtuCache is where only reads are accelerated. ‘Write-back One Replica’ is a caching policy where both reads and writes are accelerated. And the writes are replicated to cache media in another host in the same ESXi cluster. Step1: Deploy VirtuCache OVA. Import the VirtuCache…

18 Mar: Write Through caching policy

Write-Through caching policy accelerates only reads. This is how Write-Through caching works in VirtuCache. When a block is first read by VMware from backend storage, VirtuCache immediately copies it to in-host cache media. When the block is requested again by VMware, VirtuCache now serves it from the in-host cache. As…

18 Mar: Write Back caching policy

Write-Back caching policy accelerates reads and writes. The read IO path is exactly the same as with Write-Through caching. However, the write IO path is very different. All writes from VMware are written to the in-host cache media without synchronously writing to the backend storage. By writing only to the in-host…

19 Jun: Creating a redundant network for write replication

If you plan to use Write-Back policy with write replication, you need to select a network in vSphere for write replication. Here are a few options to create a write replication network. 1. Create a new port group in your existing virtual switch that has two teamed 10gbps NIC ports…

03 Jun: Points to note for VirtuCache evaluation

The hosts need to be in an ESXi cluster for VirtuCache GUI to work. If VirtuCache is installed only on one host, then Datastores won’t show in VirtuCache GUI, but the VMs will show and you can apply caching policies at the VM level. Two or more hosts should be…