[Gluster-users] Hundreds of duplicate files

Sun Dec 21 04:53:48 UTC 2014

Try 'getfattr -m . -d -e hex' (dot instead of dash) and, of course, do 
that as root.

On 12/20/2014 06:02 PM, tbenzvi at 3vgeomatics.com wrote:
> Hi everyone,
> We have a distributed Gluster volume on five bricks over two servers 
> (first server running gluster 3.4.2, second server running gluster 
> 3.5.1, both running Fedora 20)
> Starting last week, doing a file listing on the mounted volume shows 
> many files with the same name appearing twice (and they are listed 
> with the same inode). Doing a search for these files, I have found 
> 290,000 of them!!
> If I do a listing of these files on the bricks themselves, it looks 
> like most are link files (du will show the file on the first server as 
> 0 bytes, and the sticky bit set). The file is fine on the second 
> server. Unfortunately, running "getfattr -m - -e hex -d" on the file 
> shows NO gluster-related attributes and I believe this is why both 
> files appear in the listing. The files cannot be read by any programs 
> as it is trying to read the link file. I assume the metadata became 
> corrupted. This is a production server so we really need to know:
> 1. How did this happen, and how can we prevent it going forward? There 
> was a server crash a week ago and I believe that was the cause.
> 2. How can we heal the Gluster volume/bricks and link files. If there 
> is some straightforward way of restoring the link file pointer I can 
> write a script to do it, obviously doing this manually will be impossible.
> Thanks very much for any and all help - much appreciated!
> Regards,
> Tom
> On Wed, Dec 17, 2014 at 4:07 AM, <tbenzvi at 3vgeomatics.com> wrote:
> > Hi everyone, we have noticed some extremely odd behaviour with our
> > distributed Gluster volume where duplicate files (same name, same or
> > different content) are being created and stored on multiple bricks. 
> The only
> > consistent clue is that one of the duplicate files has the sticky 
> bit set. I
> > am hoping someone will be able to shed some light on why this is 
> happening
> > and how we can restore the volume as there appear to be hundreds of such
> > files. I will try to provide as much pertinent information as I can.
> >
> > We have a 130TB Gluster volume consisting of two 20TB bricks on 
> server1, and
> > three 40TB bricks on a server2 which were added at a later date (and
> > rebalancing was done). The volume is mounted on server1, and 
> accessed only
> > through this server but by many users. Both servers went down due to 
> power
> > loss several days ago after which this problem was first noticed. We 
> ran a
> > rebalance command on the volumes, this has not fixed the problem.
> >
> >
> > Gluster volume info:
> > Volume Name: safari
> > Type: Distribute
> > Volume ID: d48d0e6b-4389-4c2c-8fd1-cd2854121eda
> > Status: Started
> > Number of Bricks: 5
> > Transport-type: tcp
> > Bricks:
> > Brick1: server1:/data/glusterfs/safari/brick00/brick
> > Brick2: server1:/data/glusterfs/safari/brick01/brick
> > Brick3: server2:/data/glusterfs/safari/brick02/brick
> > Brick4: server2:/data/glusterfs/safari/brick03/brick
> > Brick5: server2:/data/glusterfs/safari/brick04/brick
> >
> >
> > Size information:
> > /dev/sdc 37T 16T 22T 42% /data/glusterfs/safari/brick02
> > /dev/sdd 37T 16T 22T 42% /data/glusterfs/safari/brick03
> > /dev/sde 37T 17T 21T 45% /data/glusterfs/safari/brick04
> > /dev/md126 11T 7.7T 2.8T 74% /data/glusterfs/safari/brick00
> > /dev/md124 11T 8.0T 2.5T 77% /data/glusterfs/safari/brick01
> > server2:/safari 130T 63T 68T 48% /sar
> >
> >
> > Example 1:
> > -Two files with the same name exist in one directory
> > -They have different contents and attributes
> > -A file listing on the mounted volume shows the same inode
> > -The newer file has sticky bit set
> > -Neither file is corrupted, they can both be viewed by using the 
> absolute
> > path (on the bricks)
> >
> > File listing on the mounted volume
> > 13036730497538635177 -rw-rw-r-T 1 jon users 924 Dec 15 10:42 RSLC_tab
> > 13036730497538635177 -rw-rw-r-- 1 jon users 418 Mar 18 2013 RSLC_tab
> >
> > Listing of the files on the bricks:
> > 8925798411 -rw-rw-r-T+ 2 jon users 924 Dec 15 10:42
> > 
> /data/glusterfs/safari/brick00/brick/complete/shm/rs2/ottawa/mf6_asc/stack_org/RSLC_tab
> > 51541886672 -rw-rw-r--+ 2 1002 users 418 Mar 18 2013
> > 
> /data/glusterfs/safari/brick02/brick/complete/shm/rs2/ottawa/mf6_asc/stack_org/RSLC_tab
> >
> >
> > Example 2:
> > -Two files with the same name exist in one directory
> > -They have the same content and attributes
> > -No sticky bit is set when looking at file listing on the mounted volume
> > -Sticky bit is set for one while when looking at file listing on the 
> bricks
> > -Files are corrupted
> >
> > File listing on the mounted volume:
> > 13012555852904096080 -rw-rw-r-- 1 tom users 2393848 Dec 8 2013
> > ifg_lr/20130226_20130813.diff.phi.ras
> > 13012555852904096080 -rw-rw-r-- 1 tom users 2393848 Dec 8 2013
> > ifg_lr/20130226_20130813.diff.phi.ras
> >
> > Listing of the files on the bricks:
> > 17058578 -rw-rw-r-T+ 2 tom users 2393848 Dec 13 17:11
> > 
> /data/glusterfs/safari/brick00/brick/rsc/rs2/calgary/u22_dsc/stack_org/ifg_lr/20130226_20130813.diff.phi.ras
> > 57986922129 -rw-rw-r--+ 2 1010 users 2393848 Dec 8 2013
> > 
> /data/glusterfs/safari/brick02/brick/rsc/rs2/calgary/u22_dsc/stack_org/ifg_lr/20130226_20130813.diff.phi.ras
> >
> >
> > Additionally, only some files in this directory are duplicated. The
> > duplicated files are corrupted (can not be viewed as Raster images: the
> > original file type)
> > The files which are not duplicated are not corrupted.
> >
> > File command: (notice duplicate and singleton files)
> > ifg_lr/20091021_20100218.diff.phi.ras: Sun raster image data, 1208 x 
> 1981,
> > 8-bit, RGB colormap
> > ifg_lr/20091021_20101016.diff.phi.ras: data
> > ifg_lr/20091021_20101016.diff.phi.ras: data
> > ifg_lr/20091021_20101109.diff.phi.ras: Sun raster image data, 1208 x 
> 1981,
> > 8-bit, RGB colormap
> > ifg_lr/20091021_20101203.diff.phi.ras: Sun raster image data, 1208 x 
> 1981,
> > 8-bit, RGB colormap
> > ifg_lr/20091021_20101227.diff.phi.ras: Sun raster image data, 1208 x 
> 1981,
> > 8-bit, RGB colormap
> > ifg_lr/20091021_20110120.diff.phi.ras: Sun raster image data, 1208 x 
> 1981,
> > 8-bit, RGB colormap
> > ifg_lr/20091021_20110213.diff.phi.ras: data
> > ifg_lr/20091021_20110213.diff.phi.ras: data
> > ifg_lr/20091021_20110309.diff.phi.ras: data
> > ifg_lr/20091021_20110309.diff.phi.ras: sticky data
> > ifg_lr/20091021_20110402.diff.phi.ras: Sun raster image data, 1208 x 
> 1981,
> > 8-bit, RGB colormap
>
>
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