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Installation

Adding new ESXi hosts to a cluster that already has VirtuCache.
After a VirtuCache driver update - the prior configuration is automatically applied
After registering VirtuCache vCenter Flash client plugin the VirtuCache tab might not appear immediately.
Applying a New Temporary License Key for VirtuCache
Changing IP address of VirtuCache Manager VM
Creating a user in ESXi with root privileges
Ensuring that Infinio is uninstalled before installing VirtuCache
Flash client plug-in doesn't show any data in vcenter 6.7 Flash client
FusionIO cards in ESXi 6.x
If VFRC or Host Swap Cache was being used prior to VirtuCache, please remove Virtual Flash Resource in VMware
In case of multiple vCenters in the environment
Installation and Configuration Instructions for VirtuCache in a VMware Stretched Cluster
Maximum SSD capacity as cache device
One Page Installation and Configuration Instructions for VirtuCache
Plugin Migration when vCenter is Migrated
Points to note for VirtuCache evaluation
PowerCLI Script for Changing PSP to Virtunet Round Robin and setting RR IOPS to 1
Process to Get a Permanent License Key for VirtuCache and Applying it
Reinstalling / Upgrading VirtuCache
To assign a higher Queue Depth to a ESXi host SATA or SAS SSD, configure SSD as Raid 0 and not Raid 1 device
Uninstalling and Upgrading VirtuCache when ESXi and/or vCenter is Upgraded
Unloading and Re-loading VirtuCache Driver
VAAI Plugin Dependency for VirtuCache
VirtuCache 2.0 GUI showing hosts but no other data from vCenter is being displayed
VirtuCache deployment using VMware Update Manager / Lifecycle Manager
VirtuCache Manager OVA import is stuck at 'Validating' message
VirtuCache's VMware Flash web client is not updating.
When a VM has many vDisks across different Datastores

Configuration

Accelerating Veeam backups
Adding new ESXi hosts to a cluster that already has VirtuCache.
After a VirtuCache driver update - the prior configuration is automatically applied
After registering VirtuCache vCenter Flash client plugin the VirtuCache tab might not appear immediately.
Auto-complete in VM tab in the GUI doesn't work
Changing IP address of VirtuCache Manager VM
Changing Path Selection Policy (PSP)
Configuring IP address for eth1 interface for VirtuCache Management VM
Configuring Windows VMs for Maximum IO
Creating a redundant network for write replication
Creating a second userid in ESXi with root privileges
Datastores not showing in VirtuCache GUI when only one host is in the cluster
Disk.SchedNumReqOutstanding (DSNRO) parameter that restricts LUN Queue Depth
Email alerts to be sent to Virtunet in case of VirtuCache errors
Ensuring that Queue Depths are Not the Bottleneck
Figuring out Transport Mode and Storage Controller Snapshots in Veeam
Flash client plug-in doesn't show any data in vcenter 6.7 Flash client
Flushing cache to SAN before backups are initiated - Write-Back caching, Veeam Direct SAN access transport mode, and storage controller snapshots
GUI not showing any objects or objects in GUI disappearing intermittently
Host Failure and 'Write-Back One Replica' Caching Policy
How to find out the Adapter Queue Depth and Device Queue Depth of RAID controller and RAIDed SSD?
How to know if you need more cache capacity?
How to Quickly Change the Boot Device for VMware ?
How to use the same physical NIC ports as iSCSI for VirtuCache replication, since those are the only 10gbps ports on our hosts
In case of multiple vCenters in the environment
Increasing the Destaging Window for Dirty Write Cache
Installation and Configuration Instructions for VirtuCache in a VMware Stretched Cluster
Maximum SSD capacity as cache device
Multi Pathing in RedHat and SuSE CEPH
Plugin Migration when vCenter is Migrated
PowerCLI Script for Changing PSP to Virtunet Round Robin and setting RR IOPS to 1
Powershell scripts to move VMs to Write-Through before storage appliance snapshot starts and move VMs back to original caching policy after snapshot completes
Read redirects when VM vMotions
Reinstalling / Upgrading VirtuCache
Resetting stats in VirtuCache Manager GUI
Selecting a NVME SSD for a new ESXi Host
Selecting SSD to Cache for Standalone Host that's not in a VMware Cluster
Setting IOPS limit for path switch over for Round Robin PSP
Support for Multi-Path Plugins (MPP)
Supported Horizon View VDI features
Testing Jumbo Frames on the VirtuCache Replication Network
To assign a higher Queue Depth to a ESXi host SATA or SAS SSD, configure SSD as Raid 0 and not Raid 1 device
U.2 to PCIe Adapter for NVME SSDs
Unloading and Re-loading VirtuCache Driver
Using RAID SSDs as Cache Device
VirtuCache Caching to RAM and VMware Service Provider Pricing
VirtuCache compatibility with VMware snapshots
VirtuCache Configuration for Reducing Write Latencies in a VMware Stretched Cluster
VirtuCache interoperability with Veeam, Zerto, Commvault, Avamar, AppAssure. Nakivo, Actifio and Tivoli backup and replication software
VirtuCache Plugin for HTML5 and Flash vCenter Web Clients
VirtuCache's VMware Flash web client is not updating.
vMotion between hosts that are in two different datacenters
VMs not in Write-Back mode because of Replication Network issues
VMs not moving to 'Write Back' operational state when using vMotion TCP/IP stack.
Vmware Replication is supported
What caching policy is assigned if VMDKs for a VM are in different Datastores?
What happens to the cache when a VM is powered off
What to do if plugin in the thick client doesn't show
When a VM has many vDisks across different Datastores
Why are my backup times not improving with VirtuCache?
Write Back caching policy
Write cache replication to protect against data loss in case of host failure
Write Through caching policy

Troubleshooting

After registering VirtuCache vCenter Flash client plugin the VirtuCache tab might not appear immediately.
After VM is restored or migrated to the cluster that uses VirtuCache, the VM doesn't show in the VirtuCache GUI
Assigning a SSD to VirtuCache fails if the SSD was being used by another host side caching software
Assigning unique BIOS UUID to VMs sharing the same BIOS UUID (duplicate UUIDs)
Changing Path Selection Policy (PSP)
Consequences of path failover in VirtuCache
Copying VirtuCache OVA to a Datastore fails with message "Typically this problem occurs due to certificates..."
Creating a second userid in ESXi with root privileges
Dell Equallogic Appliance
Disk.SchedNumReqOutstanding (DSNRO) parameter that restricts LUN Queue Depth
Duplicate UUIDs when using Instant Clones and AppVolumes in Horizon VDI
Duplicate UUIDs when VMs are deployed from vApp templates in vCloud Director
Error : Cannot remove module vnx2: Consumed resource count of module is not zero
Extracting SQLite Database from VirtuCache Manager VM
Finding out host memory usage by VirtuCache
Flushing cache to SAN before backups are initiated - Write-Back caching, Veeam Direct SAN access transport mode, and storage controller snapshots
FusionIO cards in ESXi 6.x
GUI not showing any objects or objects in GUI disappearing intermittently
High latency because insufficient RAM or SSD capacity assigned to VirtuCache
High network latencies in CEPH as shown in VirtuCache charts
Host Failure and 'Write-Back One Replica' Caching Policy
Hosts not showing in VirtuCache GUI
How does VirtuCache handle host failure and VMware High Availability (HA) ?
How to decode VMware/SCSI error/sense codes
How to delete VirtuCache plugin from VMware's thick (.NET) client
How to delete VirtuCache vclient plugin in VMware's Flash GUI?
How to delete VirtuCache vclient plugin in VMware's HTML5 GUI?
How to find out the Adapter Queue Depth and Device Queue Depth of RAID controller and RAIDed SSD?
How to find the build number of VirtuCache caching driver software?
How to identify the VirtuCache adapter (vmhba)?
How to know if you need more cache capacity?
How VirtuCache supports regular vMotion, Storage vMotion, X-vMotion across different vcenter objects?
HTML5 Plugin for vCenter doesn't show any data
HTML5 plugin is not attaching to vCenter
If the Flash web client is not working?
If the SSD does not show up in the Cache Device drop down box?
If VFRC or Host Swap Cache was being used prior to VirtuCache, please remove Virtual Flash Resource in VMware
If VirtuCache GUI shows no data after applying a permanent license key
In case of multiple vCenters in the environment
In case the Write-Replication network fails
Incorrect VM performance data in VirtuCache plugin for vCenter Flash client for VDI, Xenapp, and VMs with snaphot
Instructions to upload VMware and VirtuCache logs to Virtunet Google Drive or FTP location
Interoperability with Instant Clones
Log collection in a secure, classified environment
Log4j vulnerability doesn't affect VirtuCache
Low cache hit ratio if RAM assigned to VirtuCache is always full
Low Cache Hit Ratios for VMware View using Linked Clones
Low Cache Hit Ratios when Backend Disk is SATA Hard Drive
Low Queue Depth on HP Smart Array Controller
LUN IDs are different than original LUN IDs and multiple paths to the same LUN have different LUN IDs
LUN numbers shown in VMware are different from backend storage LUN numbers
NVME SSDs not performing as expected in ESXi 6.0 with the in-box NVME device driver
Out of memory condition prevents the SSD from being assigned to VirtuCache
Paths get disabled when VirtuCache fronts CEPH
Peer connections not established if hosts in a cluster have different VirtuCache build number
Performance deteriorates if VMs have snapshots
Points to note for VirtuCache evaluation
RAID Controller on IBM hosts System x3850 x5 7145 AC1 is the cause of high latencies
Read redirects when VM vMotions
Retrieving logs to debug issues in VirtuCache / Exporting support bundle with logs
SAN Errors in the Hosts Tab in VirtuCache GUI
Script to find VMs with duplicate UUIDs
Setting IOPS limit for path switch over for Round Robin PSP
Situations where writes might not be accelerated even with Write Back policy
SSD fails to attach to VirtuCache
SSD failure alert in vCenter
Support for Multi-Path Plugins (MPP)
Test results using Iometer, FIO, Diskspd or other synthetic testing tools don't look very good.
Testing Jumbo Frames on the VirtuCache Replication Network
To assign a higher Queue Depth to a ESXi host SATA or SAS SSD, configure SSD as Raid 0 and not Raid 1 device
Unloading and Re-loading VirtuCache Driver
Using just ESXi CLI, how do you find out the storage protocol used by VMware vSphere to connect to Storage?
vCenter plugin is not showing any data in ESXi 6.7
Veeam Instant Recovery Support
Veeam SureBackup Support
VirtuCache 2.0 GUI showing hosts but no other data from vCenter is being displayed
VirtuCache can automatically claim LUNs using these PSPs
VirtuCache compatibility with VMware snapshots
VirtuCache doesn't support Write-Back caching for a cluster with mixed ESXi 6.x and 7.x hosts
VirtuCache interoperability with Veeam, Zerto, Commvault, Avamar, AppAssure. Nakivo, Actifio and Tivoli backup and replication software
VirtuCache Manager OVA import is stuck at 'Validating' message
VirtuCache plugin showing 'Error expanding plug-in zip' and/or 'Error downloading plug-in'
VirtuCache SATP compliance
VirtuCache support for VSAN
VirtuCache's VMware Flash web client is not updating.
VM Operational State Different from Caching Policy
VMs don't show in VirtuCache GUI due to intermittent Datastore connectivity
VMs not in Write-Back mode after VMware cluster assignment is changed for the host(s)
VMs not in Write-Back mode because of 'LUN not claimed' message
VMs not in Write-Back mode because of Multi-Writer VMDK
VMs not in Write-Back mode because of Replication Network issues
VMs not in Write-Back mode because they might be on local storage
VMs not in Write-Back mode because VirtuCache driver versions are not the same across hosts
VMs not moving to 'Write Back' operational state when using vMotion TCP/IP stack.
VMs with Duplicate BIOS UUIDs when using Datrium Cloning
VMs with duplicate UUIDs don't show in VirtuCache GUI
VMs with Duplicate UUIDs when using Veeam Instant Recovery
VMware Balloon Driver Causes Application Performance Issues in Guest VMs
VMware PSP is now VMW_PSP_MRU (or VNX_PSP_MRU). It was VMW_PSP_RR (or VNX_PSP_RR) before
What caching policy is assigned if VMDKs for a VM are in different Datastores?
What to do if plugin in the thick client doesn't show
Why are my backup times not improving with VirtuCache?
Write-Back caching policy not allowed for VMs with Duplicate UUIDs

System Requirements

Clustering and RDM
List of VMware ESXi versions supported by VirtuCache
VAAI Plugin Dependency for VirtuCache

Quick Recommendations

Choosing the Right Type and Capacity of SSD
One Page Installation and Configuration Instructions for VirtuCache
Points to note for VirtuCache evaluation
Uninstalling and Upgrading VirtuCache when ESXi and/or vCenter is Upgraded
Write cache replication to protect against data loss in case of host failure

Statistics

Collecting Physical Disk Performance Statistics for Windows VMs using Perfmon
Using VMware Labs IOAnalyzer VM to Measure Throughput and Latencies Across Multiple ESXi Servers
Various Ways to Collect Historical Throughput and Latency Data at the VM Level

Uninstalling

After a VirtuCache driver update - the prior configuration is automatically applied
FusionIO cards in ESXi 6.x
How to delete VirtuCache plugin from VMware's thick (.NET) client
How to delete VirtuCache vclient plugin in VMware's Flash GUI?
Uninstalling VirtuCache after an evaluation
VirtuCache vib cannot be removed - Error in running rm /tardisks/vnx2.v00

Popular Articles

How to delete VirtuCache plugin from VMware's thick (.NET) client
Using RAID SSDs as Cache Device
Ensuring that Queue Depths are Not the Bottleneck
Configuring Windows VMs for Maximum IO
Choosing the Right Type and Capacity of SSD

Newest Articles

List of VMware ESXi versions supported by VirtuCache
vCenter plugin is not showing any data in ESXi 6.7
What caching policy is assigned if VMDKs for a VM are in different Datastores?
Log4j vulnerability doesn't affect VirtuCache
Duplicate UUIDs when using Instant Clones and AppVolumes in Horizon VDI

Recently Updated Articles

Uninstalling and Upgrading VirtuCache when ESXi and/or vCenter is Upgraded
Process to Get a Permanent License Key for VirtuCache and Applying it
List of VMware ESXi versions supported by VirtuCache
SAN Errors in the Hosts Tab in VirtuCache GUI
Setting IOPS limit for path switch over for Round Robin PSP

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