[sheepdog] [PATCH 3/3] plain_store: store stale objects in .stale/[epoch]/

[MORITA Kazutaka]

At Sun, 26 Aug 2012 19:15:58 +0800,
Liu Yuan wrote:
> 
> On 08/26/2012 06:50 PM, MORITA Kazutaka wrote:
> > This is necessary to pass test 034.
> > 
> > Storing stale objects in a flat directory causes a problem.  It is
> > because if the objects are updated while leaving cluster, sheep cannot
> > detect it and uses the local stale objects as the latest one.  It is
> > mandatory to store stale objects with epoch information like old farm
> > code or simple store.
> > 
> > This patch create a epoch directory like simple store.  I think this
> > is the simplest way to store stale objects with epoch info.
> 
> I am actually doing the same problem. I have thought of this approach, but I come 
> up with another one, instead of use [epoch]/oid to tag the stale object, I just play
> with its name to store stale objects:
> 
>   .stale/oid.epoch

This looks better because we don't need to create a new directory.

Thanks,

Kazutaka