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Unmap Space Reclamation Operations on Dell SCv3020 VMFS5
Trying to see if i can run both unmap commands consecutively. Will this adverse affect the disk operations on the Virtual machines? I have 4 hosts and baout 40 running VMs
1st Command:
esxcli storage vmfs unmap -u XXXXX - n 1024
2nd Command
esxcli storage vmsf unmap - u xxxxx
I know the second command will check for the default 200MB blocks while the 1st command will check for 1MB blocks.
DELL-Erman O
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November 3rd, 2023 10:29
Hi, I found two articles that maybe related. What I took away from these is the following. the esxcli storage vmfs unmap command can free up storage blocks that are not used on a VMFS datastore for a device with thin provisioning. However, this command has some restrictions and challenges, especially on VMFS5 datastores . For instance:
Therefore, it is advisable to run the unmap command when the traffic is low or when the virtual machines are not running. Running both unmap commands one after another might not be needed, as the second command will scan the same blocks as the first command,
Reclaiming VMFS deleted blocks on Thin Provisioned LUNs (2057513) (https://dell.to/3FJDG8c)
Space Reclamation Requests from Guest Operating Systems (https://dell.to/3FJDG8c)