Comment 25 for bug 1029950

It was my previous comment, I don't understand the concern.

The max size of the snapshot is generally constrained by the max size of the virtual root disk.

It might expand bigger than that due to branching in the disk "snapshot" chain.I wasn't clear, but I was looking for more detail on how you make that chain grow, such that the size is unbounded.

But I think I miss-read this. I guess the idea is to check the snapshot size in glance *before* doing the download, in the hope that glance is not lying about the stated size of the snapshot. I know in the XenAPI driver we check the size, but that is post download.