[Gluster-users] bitrot error correction in gluster 3.8 distributed dispersed setup

[Ashish Pandey]

Hi, 

"gluster v heal " command does not heal corrupt files detected by bitrot feature. 
You have modified a file from back end and corrupted it. 

I think to correct your corrupted files (in fact the part of file in case of disperse volume) you have to delete that part and run gluster v heal <volname> full 
to correct the file. 

Keeping Kotresh in cc for better input of bitrot. 

Ashish 


----- Original Message -----

From: "itlinux_team" <itlinux at imppc.org> 
To: gluster-users at gluster.org 
Sent: Wednesday, July 20, 2016 7:43:56 PM 
Subject: [Gluster-users] bitrot error correction in gluster 3.8 distributed dispersed setup 

Hi all, 

I'm testing the bitrot feature on a distributed dispersed setup: 3 x (8 
+ 4). 
I simulated a bit-flip on the part of a couple of files in a brick, 
having bitrot feature enabled before. The output from ''gluster volume 
bitrot vol_1 scrub status'' shows that two files are corrupted as shown 
below: 


--- 
Volume name : vol_1 

State of scrub: Active 

Scrub impact: normal 

Scrub frequency: daily 

Bitrot error log location: /var/log/glusterfs/bitd.log 

Scrubber error log location: /var/log/glusterfs/scrub.log 


========================================================= 

Node: localhost 

Number of Scrubbed files: 564 

Number of Skipped files: 0 

Last completed scrub time: 2016-07-20 13:37:16 

Duration of last scrub (D:M:H:M:S): 0:0:0:50 

Error count: 0 


========================================================= 

Node: glusterserver1 

Number of Scrubbed files: 562 

Number of Skipped files: 0 

Last completed scrub time: 2016-07-20 13:37:16 

Duration of last scrub (D:M:H:M:S): 0:0:0:51 

Error count: 2 

Corrupted object's [GFID]: 

e3cbffbe-12bd-4e1c-8dcf-2ef87ac99990 

2550475e-cf9e-4781-9a05-9e11c1dd6b7a 


========================================================= 

Node: glusterserver3 

Number of Scrubbed files: 564 

Number of Skipped files: 0 

Last completed scrub time: 2016-07-20 13:37:16 

Duration of last scrub (D:M:H:M:S): 0:0:0:50 
--- 


I have executed ''gluster volume heal vol_1 full'' but it does not seem 
to fix the files, however the file that the client reads is the correct 
one. 

How should I handle this kind of corruption within gluster? 

Thanks! 
Iñaki. 

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