[Gluster-devel] self heal option

[Krishna Srinivas]

Hi August,

http://www.mail-archive.com/gluster-devel@nongnu.org/msg01244.html

I will put the details in the wiki soon.

Regards
Krishna


On 9/11/07, August R. Wohlt <glusterfs at isidore.net> wrote:
> That does the trick. And now I recall reading that in the archives as well.
>
> I notice that the only explanation of self-heal in the wiki docs is in the
> unify translator page: (
> http://www.gluster.org/docs/index.php/Understanding_Unify_Translator).
>
> Any suggestions for a good place to start an explanation of passive
> self-heal in afr?
>
> thanks again,
> august!
>
> On 9/10/07, Matt Paine <matt at mattsoftware.com> wrote:
> >
> > Hi August
> >
> >
> > > Take a simple 2 machine afr mirror for example (spec file below). I
> > > have a brick on machine A doing afr to the brick on machine B and vice
> > > versa. If one of the bricks goes down and I create a file on the
> > > remaining one, is there any way to have healing done with the other
> > > brick comes back up?
> >
> > At the moment the self heal functionality is passive. I.e. you need to
> > do an open on the file to kick in self-heal. I believe the dev team are
> > working on active self heal (like what you are describing).
> >
> >
> > You could try running this short script to find all your files and open
> > them, which should self-heal every file if neccesary
> >
> > find /mnt/glusterfs/ -type -f -exec head -c 1 {} \;
> >
> > Or something along those lines anyway :)
> >
> >
> > > In my testing, I don't see any evidence of self-heal in afr even
> > > though several folks have it in their spec files. When I bring the
> > > other machine back online, files that were create while it was down
> > > are never created on the mirror brick.
> > >
> > > Can someone with a more intimate knowledge of the code comment on this
> > > ? thanks...
> > >
> >
> >
> > As I said - simply open that file and self-heal will kick in. As far as
> > I am aware this is the way it works on both afr and unify xlators at the
> > moment - and also I believe the devs are working on an automated way to
> > do self heal if its a requirement.
> >
> >
> >
> >
> > Matt.
> >
> >
> >
> >
> > _______________________________________________
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> >
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