[sheepdog] [PATCH v2 2/9] sheep: add cmd argument -W to specify a max cache size

[MORITA Kazutaka]

At Thu, 26 Jul 2012 11:32:42 +0800,
Liu Yuan wrote:
> 
> On 07/26/2012 11:25 AM, MORITA Kazutaka wrote:
> > At Thu, 26 Jul 2012 10:55:00 +0800,
> > Liu Yuan wrote:
> >>
> >> On 07/26/2012 09:49 AM, levin li wrote:
> >>> Currently, -W is not always needed even if -w is used, if no -W, it means
> >>> the cache will never be reclaimed.
> >>>
> >>> If we use -w like the way you mentioned, maybe we can not use it like the
> >>> following way to specify that no cache will be reclaimed.
> >>>
> >>> $ sheep -w -d /store
> >>
> >> maybe we can use -w 0 to indicate that we don't need cache reclaim?
> > 
> > Are there any cases where unlimited object cache is necessary?  Even
> > if we have a machine with 1 TB RAM, we should specify '-w 1048576' to
> > avoid OOM errors, shouldn't we?
> > 
> 
> Probably we more need automatic detection of best reclaim size. For e.g,
>  -w auto means automatic detection
>  -w user 10G means manual setting.

Looks good to me, but do you have any ideas about how to determine the
best reclaim size?

Thanks,

Kazutaka