[Gluster-users] favorite-child and self-heal BUG ?

[artur.k]

Dnia 8 stycznia 2009 13:41 "Krishna Srinivas" <krishna at zresearch.com> napisał(a):

> As Keith said you should not modify the backend directly.
> 
> You are seeing 2nd servers files because (logs indicate) 2nd servers
> directory had extended attributes
> (because of some previous operations) which said that it is the
> latest, hence the 1st servers files were deleted and 2nd servers files
> were put in the 1st server.
> 
> Krishna
> 
> On Thu, Jan 8, 2009 at 5:27 PM, Keith Freedman  wrote:
> > you're modifying the filesystem outside of gluster so the results
> > will not be what you expect.
> >
> > when you remove the files from the directory outside of gluster, the
> > gluster extended attributes dont get updated.
> >
> > so when gluster is running again, and the directory accessed, it sees
> > that the extended attributes are the same on both servers, but that
> > one of them is missing files, so to be safe, it merges the directory
> > listings.. this effectively 'returns' the files you deleted in the listing.
> > when you then go to access the files, it will auto-heal the file from
> > the other server since it's not on this one's underlying filesystem.
> >
> > in order to do a real test, you should turn off one server, then
> > delete the file FROM THE GLUSTER MOUNT, then turn on the other
> > server, and this will correctly auto-heal and delete the entries from
> > the remote server.
> >
> > you should treat any underlying filesystem as a raw untouchable volume.
> > you cant expect a system to manage things in the face of unexpected
> > external influences.
> >

if the disc will fall on a single server glaster remove files from the second (good server) ?



noc-xx-2:/mnt/glusterfs# echo 7 > 7
bash: 7: Input/output error
noc-xx-2:/mnt/glusterfs#
noc-xx-2:/mnt/glusterfs# echo 7 > 7
bash: 7: Input/output error
noc-xx-2:/mnt/glusterfs# echo 7 > 7
noc-xx-2:/mnt/glusterfs#
noc-xx-2:/mnt/glusterfs#


ehh... if the 7 file exist only once server. on second server deleted by rm -f  trac-xx-1:/var/storage/glusterfs/7
:D