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
Information from Gluster log file:
Additionally, the log is full of thousands of the following such lines (possibly, one for each directory?) dating back several mponths
27 [2014-12-12 11:10:10.257950] I [dht-layout.c:726:dht_layout_dir_mismatch] 3-safari-dht: /rsc/tsx/lasvegas/spot_asc/stack/ifg_lr - disk layout missing
28 [2014-12-12 11:10:10.257988] I [dht-common.c:623:dht_revalidate_cbk] 3-safari-dht: mismatching layouts for /rsc/tsx/lasvegas/spot_asc/stack/ifg_ lr
29 [2014-12-12 11:10:13.042362] I [dht-layout.c:726:dht_layout_dir_mismatch] 3-safari-dht: /rsc/tsx/lasvegas/spot_dsc/stack/ifg_lr - disk layout missing
30 [2014-12-12 11:10:13.042395] I [dht-common.c:623:dht_revalidate_cbk] 3-safari-dht: mismatching layouts for /rsc/tsx/lasvegas/spot_dsc/stack/ifg_ lr
31 [2014-12-12 11:10:15.685876] I [dht-layout.c:726:dht_layout_dir_mismatch] 3-safari-dht: /rsc/tsx/lasvegas/spot_dsc/stack/ifg_lr - disk layout missing
32 [2014-12-12 11:10:15.685921] I [dht-common.c:623:dht_revalidate_cbk] 3-safari-dht: mismatching layouts for /rsc/tsx/lasvegas/spot_dsc/stack/ifg_ lr
33 [2014-12-12 11:10:19.028518] I [dht-layout.c:726:dht_layout_dir_mismatch] 3-safari-dht: /rsc/tsx/lasvegas/spot_asc/stack/ifg_lr - disk layout missing
There are also 1394 of the following errors in the last year, several (but not all) of them seem to correspond to duplicate files:
40620 [2014-12-12 22:55:57.180486] W [client-rpc-fops.c:1994:client3_3_setattr_cbk] 0-safari-client-1: remote operation failed: Operation not permitte d
40621 [2014-12-12 22:55:57.180514] E [dht-linkfile.c:213:dht_linkfile_setattr_cbk] 0-safari-dht: setattr of uid/gid on /freeport/tsx/miami/sm_asc/stac k/ifg_lr/20140930_20141102.diff.phi.ras :<gfid:00000000-0000-0000-0000-000000000000> failed (Operation not permitted)
Thanks,
Tom
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