Zero Space Reclaim - VMAX

Zero space reclaim is non impactful process which allows to reuse space which left after deleting files. This process runs on VMAX  initiates from  ESXi host.

Procedure:

1. Identify the cluster and host that you want to run the reclaim on.

2. Create alert suppression for the host CI for the reclaim window.

3. Enable SSH and disable lockdown mode for that host by logging into the respective Vcenter.

4. Get the list of data stores on that host by running following command.

esxcli storage filesystem list |grep VMFS-5 |awk '{print $2}'

5. Initiate the Reclaim process on a particular datastore by running following command.

esxcli storage vmfs unmap -l host_name -n 1200

6. Wait for the prompt to come back which means the reclaim process is complete.

7. Once the reclaim process on the datastore is complete, you can initiate the reclaim on a new datastore(Step 5).

8. Once the reclaim process on the host is complete, disable SSH and enable lockdown mode for that host from Vcenter.

 

Note: Do not initiate reclaim on more than 3 datastores at a time to avoid any performance impact.