9 Feb
2016
9 Feb
'16
6:22 a.m.
Once upon a time, Robert Nichols rnicholsNOSPAM@comcast.net said:
On 02/08/2016 07:04 PM, Chris Adams wrote:
For that purpose, use something that can TRIM a VM image, like virt-sparsify.
That's doing the same thing.
virt-sparsify works by mounting the filesystem, filling it to capacity with zeros, then performing a copy operation which skips over the all-zero blocks, leaving them unallocated in the sparse destination file.
Well, that's the slow method that copies the image. There's also the in-place method, which just does a TRIM that pokes holes in the original image (much faster and uses no extra disk space).
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Chris Adams linux@cmadams.net