Bug#556610: Please do incremental checks every night instead of a full monthly one

[Sergey B Kirpichev]

On Mon, Jan 06, 2014 at 03:14:14PM +1100, NeilBrown wrote:
> It is very unlikely to have a positive effect.

Well, at least one - we can simplify the "incremental check"
script drastically.

> If it has any effect, it will significantly slow down any check/repair etc
> that is happening.
> 
> > 
> > I think, it would be nice to end (not pause) check if it's reached
> > sync_max.  Perhaps, there is deep reasons why md's interface
> > doesn't work in this way.  Neil, could you explan this a bit?
> 
> There might be a reason to continue the resync.

Could you explain the reasons behind of this interface?

> If you want to "end" the resync, then have some program wait for
> sync_completed to reach sync_max, then write 'idle' to 'sync_action'.

Yes, I know.  But this solution looks too ugly to be a good interface
for shell-scripting.  That's why I asked the question above.

> If you (or someone here) want to write a general "incremental check" script
> then I think that is a great idea, but rather than treating it as a "Debian"
> thing, post the proposal to linux-raid at vger.kernel.org and get feedback and
> suggestions there and when it is ready we can include it in the upstream
> mdadm package.

Ok.