[sheepdog] Users inputs for new reclaim algorithm, please

[Liu Yuan]

On Tue, Mar 18, 2014 at 07:19:49AM +0900, MORITA Kazutaka wrote:
> At Tue, 18 Mar 2014 00:02:18 +0800,
> Liu Yuan wrote:
> > 
> > Keep old algorithm is a bottom line to me. Either sheep option or static #ifdef
> > looks fine to me. We can later refine it to be dynamically pluggable.
> > 
> > New algorithm looks to me more a partial solution than a generic one, compared
> > with old algorithm. So keep old algorithm really make sense especially to those
> > who seldom delete snapshots.
> 
> Why partial?  The updated snapshot-object-reclaim branch fixes the
> problem you mentioned, and the new algorithm frees more spaces than
> the old one even with your example scenario.
> 

The new version looks much better than last one and performance drop is around
10% for first write and I didn't experence space increase for clone of deletion.

So if Valerio won't find any problem, it is fine to me to merge it.

Thanks
Yuan