Gluster users - Feb 2015 - file changed as we read it

hi all,

I work with a 14 node glusterfs replica 2. and when I made a tar of a 
directory I get that message for a lot of files :

  tar: xxxxxxxxx/xsq_data/wildfire4_2014_12_09_2/L02/intermediate: file 
changed as we read it

I have check a small file and find nothing abnormal. So i hope that the 
same for all files.
but imagine that one of my users see that messages, what would it think ?

So my question is : What is the reason of that message on a file, and is 
there a configuration of glusterfs or the underlying file system,  to 
avoid it ?

Many thanks in advance.

sincerely.

-- 
Signature electronique
INRA <http://www.inra.fr>
*Pierre L?onard*
*Senior IT Manager*
*MetaGenoPolis*
Pierre.Leonard at jouy.inra.fr <mailto:Pierre.Leonard at jouy.inra.fr>
T?l. : +33 (0)1 34 65 29 78

Centre de recherche INRA
Domaine de Vilvert ? B?t. 325 R+1
78 352 Jouy-en-Josas CEDEX
France
www.mgps.eu <http://www.mgps.eu>

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Hi, 

This bug was recently fixed by the following four patches: 
http://review.gluster.org/#/c/9477/ 
http://review.gluster.org/#/c/9465/ 
http://review.gluster.org/#/c/9476/ 
http://review.gluster.org/#/c/9457/ 

The fixes will become available in 3.6.3 and 3.5.4. 

As a workaround, could you try the following two steps: 
1. disable performance.stat-prefetch on the volume (by executing `gluster volume
set <volname> performance.stat-prefetch off`)
2. unmount and mount the volume with use-readdirp=no on the client: 
Ex: mount -t glusterfs -o use-readdirp=no kritika:/rep /mnt 

and see if it fixes the issue for you? 

Meanwhile, may I know what version of gluster you are using? 

-Krutika 

----- Original Message -----
> From: "Pierre L?onard" <pleonard at jouy.inra.fr>
> To: gluster-users at gluster.org
> Sent: Tuesday, February 24, 2015 5:36:44 PM
> Subject: [Gluster-users] file changed as we read it
> hi all,
> I work with a 14 node glusterfs replica 2. and when I made a tar of a
> directory I get that message for a lot of files :
> tar: xxxxxxxxx/xsq_data/wildfire4_2014_12_09_2/L02/intermediate: file
changed
> as we read it
> I have check a small file and find nothing abnormal. So i hope that the
same
> for all files.
> but imagine that one of my users see that messages, what would it think ?
> So my question is : What is the reason of that message on a file, and is
> there a configuration of glusterfs or the underlying file system, to avoid
> it ?
> Many thanks in advance.
> sincerely.
> --
> Signature electronique
> 
> 
> 
> Pierre L?onard
> Senior IT Manager
> MetaGenoPolis
> Pierre.Leonard at jouy.inra.fr
> T?l. : +33 (0)1 34 65 29 78
> 
> Centre de recherche INRA
> Domaine de Vilvert ? B?t. 325 R+1
> 78 352 Jouy-en-Josas CEDEX
> France
> www.mgps.eu
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://www.gluster.org/mailman/listinfo/gluster-users
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