[Gluster-users] Continual heals happening on sharded cluster, me too...

[Ashish Pandey]

Hi Nicolas, 

I think this issue has already been raised where we are seeing different heal info from different servers. 

https://bugzilla.redhat.com/show_bug.cgi?id=1335429 
Patch for this is under review. 

Ashish 



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

From: "Nicolas Ecarnot" <nicolas at ecarnot.net> 
To: "gluster-users" <Gluster-users at gluster.org> 
Sent: Thursday, May 12, 2016 8:38:53 PM 
Subject: [Gluster-users] Continual heals happening on sharded cluster, me too... 

Hello, 

On a replica 3 sharded cluster in gluster 3.7.11 (CentOS 7.2), I've 
witnessed a very sound behaviour for months. 
Recently, I've upgraded from [something quite recent, like 
3.7.something] to 3.7.11, and immediately, I'm seeing continual healing 
appearing. 

I'm using this cluster to host 3 oVirt VMs with very low I/O. 

I read and tried to use informations here : 
https://www.mail-archive.com/gluster-users%40gluster.org/msg24598.html 
but I'm missing knowledge to know how to fix things. 

Here what I see when running "gluster volume heal data-shard-03 info" : 

* serv-vm-al01 

Brick serv-vm-al01:/gluster/data/brick03 
Status: Connected 
Number of entries: 0 

Brick serv-vm-al02:/gluster/data/brick03 
Status: Connected 
Number of entries: 0 

Brick serv-vm-al03:/gluster/data/brick03 
Status: Connected 
Number of entries: 0 

* serv-vm-al02 

gluster volume heal data-shard-03 info 
Brick serv-vm-al01:/gluster/data/brick03 
<gfid:75ab0b1c-258f-4349-85bd-49ef80592919> 
<gfid:39bdcf05-f5b1-4df2-9941-614838b50e18> 
<gfid:7e0d84a0-0749-4a2d-9390-e95d489ec66a> 
Status: Connected 
Number of entries: 3 

Brick serv-vm-al02:/gluster/data/brick03 
/.shard/41573624-feb9-4ea6-bbd4-f0a912429b2f.1003 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.2351 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.1113 
Status: Connected 
Number of entries: 3 

Brick serv-vm-al03:/gluster/data/brick03 
/.shard/34948b18-5991-4761-b867-2bd4fe4879d4.2807 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.2351 
/.shard/34948b18-5991-4761-b867-2bd4fe4879d4.2062 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.1113 
/.shard/41573624-feb9-4ea6-bbd4-f0a912429b2f.1833 
Status: Connected 
Number of entries: 5 

* serv-vm-al03 

Brick serv-vm-al01:/gluster/data/brick03 
/.shard/41573624-feb9-4ea6-bbd4-f0a912429b2f.882 
<gfid:39bdcf05-f5b1-4df2-9941-614838b50e18> 
<gfid:93c83d37-71e5-4f17-b757-ff00a4384f2f> 
<gfid:75fcdab7-6d18-4371-bbb2-be156dd3da86> 
<gfid:75ab0b1c-258f-4349-85bd-49ef80592919> 
<gfid:f933a07a-4f89-4bf9-ab82-a05432a0162f> 
/.shard/34948b18-5991-4761-b867-2bd4fe4879d4.2329 
Status: Connected 
Number of entries: 7 

Brick serv-vm-al02:/gluster/data/brick03 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.1113 
/.shard/34948b18-5991-4761-b867-2bd4fe4879d4.2807 
/.shard/41573624-feb9-4ea6-bbd4-f0a912429b2f.190 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.2351 
Status: Connected 
Number of entries: 4 

Brick serv-vm-al03:/gluster/data/brick03 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.1113 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.185 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.183 
/.shard/26ec536a-8919-478c-834c-f6ac70882ee6.2351 
Status: Connected 
Number of entries: 4 

We are monitoring healed entries in Nagios/centreon, and history graph 
are showing that from the time I upgraded to 3.7.11, it went from around 
0~1 files to heal every 5 minutes, to an average of 6 to 10 files to 
heal every minutes. 
The VMs are still doing the exact same nothing as previous. 

Questions : 
- how comes? 
- how to fix? 

-- 
Nicolas ECARNOT 
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