[sheepdog] [PATCH] sheep: add a kill node operation

[Dietmar Maurer]

> > Maybe we can delay the start of recovery for some time (1h)? That way
> > a normal server reboot does not harm.
> >
> >
> 
> Then how do you handle IOs routed to the down node if you don't recover
> the membership state? 

like 'recovery in process'? It simply delays starting copy data by some time.

For example you could set 'recovery_delay' to:

0 => start immediately (current behaviour)
X => start copying data after X seconds
MAX_INT => never start (manual)

When set to a moderate value (5 minutes), you can simple reboot a server without problems.

Recovery takes quite long (depends on amount of data and network speed), so adding 
a short delay should not harm?

- Dietmar