![]() No other virtualization platform comes close. It’s a testament to the rock-solid architecture behind VMware ESX and VMFS. You may have been surprised at how easy it is to recover from a full datastore - without so much as a guest OS reboot. PsexecOnVM "cmd /c copy /Y $iso c:\" (createVMlist (31.39)) VMware ESX is Resilient # make sure Sysinternals psexec is in your path # credentials to download above file from \\fileserver # UNC path to a large file that will be copied into each VM # VM naming convention combines this string with 2-digit number Run it from anywhere - it uses Sysinternals psexec to remotely initiate a file copy on each VM from a network share. To simulate a sudden storage demand by the thin-provisioned VMs in the above video, I simply copied a large file from a network share to each Windows Server 2003 VM simultaneously.įor the curious, below is a PowerShell script for the task. An alternative resolution would be to add additional space to the SAN LUN and grow the VMFS volume. Use Storage VMotion to move the disks for that VM to another datastoreĭepending on the size and storage demand of each VM, additional migrations may be needed.Free up some space by deleting or moving files - ISO images or powered-off VMs would be perfect.Here is one simple approach, step-by-step: If you ever find yourself in this situation, it’s not hard to fix. Conversely, VMs that that read and write to existing allocated storage blocks will continue running without issue - not all virtual machines will be paused just because a datastore is out of space. When VMware ESX detects this condition, virtual machines in need of additional storage are instantly paused to prevent guest operating systems from failing. When a datastore runs out of space, thin-provisioned virtual disks can no longer dynamically grow to accommodate additional storage demand. You may be nearly convinced to start using thin provisioning, but still wondering… What happens if a datastore fills up? Automatic response to a nearly-full datastore through vCenter Alarms, PowerShell, and Storage VMotion. ![]()
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