I just reclaimed unused space in our HP 3Par using a command on the ESX side such as :
esxcli storage vmfs unmap --l DATASTORENAME
it works nicely, and from the 3Par console, I can now see on my datastore/LUN :
- Used User Space : 26% (it was 46% before the reclaim)
- Reserved User Space : 4.7Tb/10Tb (did not change unfortunately)
However, in VMware, the space didn't change. I suppose this is due to this "reservation" (the space is kept reserved on the 3Par).
is there a way to remove this allocation on the SAN (I suppose the data is Zero'd), by running some kind of tuning command or compact command ?
I saw they were command such as compactcpg, but it doesn't seem to be exactly what I need, as I suppose that it will not balance the data (chunklets) correctly across the disks ? (but used fewer disks as possible and therefore decreasing the performance ?)