[sheepdog] [PATCH v2 3/4] sheep, dog: fast deep copy for snapshot

[Hitoshi Mitake]

At Mon, 19 Jan 2015 16:23:34 +0400,
Vasiliy Tolstov wrote:
> 
> 2015-01-19 13:28 GMT+03:00 Hitoshi Mitake <mitake.hitoshi at lab.ntt.co.jp>:
> > dog vdi snapshot <vdi> --no-share has a bottleneck: the dog
> > process. This patch adds a new option --fast-deep-copy to dog vdi
> > snapshot, which avoid the bottleneck.
> >
> > If the option is passed to the dog command, actual copying of data
> > objects are done by sheep processes. So the dog process isn't a
> > bottleneck in this case.
> 
> 
> Why not enable this option by default?

Because it employes an agressive method and is not well tested yet.

Thanks,
Hitoshi