This is the procedure that has worked for me. There are various methods dating as far back as 2011 across the internet, but this step-by-step works in my environment for Windows and Linux virtual machines. Step 1 – Prepare the Guest Operating Systems Windows Linux Step 2 – Punch some Holes
Read More Reclaiming space from thin provisioned disks in VMware ESXiBackup using vim-cmd To ensure that the configuration of the target ESXi host is synchronized with persistent storage, run the following command: vim-cmd hostsvc/firmware/sync_config To back up ESXi configuration, run this command: vim-cmd hostsvc/firmware/backup_config The command will produce a link for downloading the configBundle.tgz archive. Note that you have to replace the asterisk in the…
Read More Backup VMware ESXi HostUpon migrating a VM from one ESXi host to another ESXi host, I received the following message. Configuration mismatch: The virtual machine cannot be restored because the snapshot was taken with VHV enabled. To restore, set vhv.enable to true Check and confirm on both hosts that /etc/vmware/config has vhv.enabled = “TRUE” in the configuration. This…
Read More Configuration mismatch: The virtual machine cannot be restored because the snapshot was taken with VHV enabled.I had 8 paths go down to a dead state on an ESXi host. The paths were MRU via Fiber Channel to a storage array. One path worked and it was configured as RR path. I knew this wasn’t a physical issue, it had to be a software/configuration issue on my host because there were:…
Read More Case of Dead Path on ESXiDuring datastore creation in vSphere using the Nimble vCenter plugin, I get the following error: A general system error occurred: esxi1: CHAP setting not compatible. hba=vmhba33 In vSphere Client I went to my ESXi host then Configuration, Storage Adapters, iSCSI Software Adapter. Taking a look at vmhba33 Properties then CHAP… I see that there was…
Read More A general system error occurred: esxi1: CHAP setting not compatible.Recently I’ve been dealing with CPU RDY of about 5% across two ESXi hosts. I’ve load balanced the best I could given necessary workloads and was able to get CPU RDY down to about 3-4% which still isn’t great. I made the decision to grab a few Intel Xeon X7560 processors to replace the existing…
Read More Intel Xeon E7540 replaced with X7560Here’s an ESXi console script to loop through each Nimble eui.* adapter and set IOPS=0 and BYTES=0 (per Nimble recommendations). for x in `esxcli storage nmp device list | awk ‘/Nimble iSCSI Disk/{print $7}’ | sed -e ‘s/(//’ -e ‘s/)//’`; do echo $x esxcli storage nmp psp roundrobin deviceconfig set -d $x -t bytes -B…
Read More Performance tuning iSCSI Round Robin policies in ESXi for Nimble storageI’ve spent some time exploring and studying the use and configuration of VMware Flash Read Cache (vFRC) and its benefits. These are my notes. Useful Resources VMware Flash Read Cache 1.0 FAQ vSphere 5.5 Flash Read Cache Documentation On a guest virtual machine, vFRC is configured in Disk configuration area. The virtual machine needs to…
Read More My Notes and Benchmarks on VMware Flash Read CacheThis will be an evolving post as I document/note the installation process and some configuration and testing. I’m installing VMware vSphere 6.5 under my current virtualization platform to give it a spin. I’m most curious about the web interface, now that it has moved exclusively in that direction. I *HOPE* it is much better than…
Read More VMware vSphere 6.5 Test DriveCPU Ready value is cumulative between the number of vCPUs the VM is assigned. For example, a one vCPU VM has the measurement of 1000ms. For a VM with two vCPUs, the same performance drop would rise to 2000ms, or 1000ms per vCPU. For a VM with four vCPUs, it would be 4000ms. Realtime Monitoring…
Read More Monitoring CPU Ready VMware Guest