Bug 985211 - [RFE] Dist-geo-rep : geo-rep syncs from all the replica-bricks, if there are multiple bricks of different sub-volume are in the same machine.
[RFE] Dist-geo-rep : geo-rep syncs from all the replica-bricks, if there are ...
Product: Red Hat Gluster Storage
Classification: Red Hat
Component: geo-replication (Show other bugs)
x86_64 Linux
low Severity medium
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Assigned To: Bug Updates Notification Mailing List
: FutureFeature
Depends On:
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Reported: 2013-07-17 02:28 EDT by Vijaykumar Koppad
Modified: 2014-12-24 01:24 EST (History)
7 users (show)

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Doc Type: Enhancement
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Last Closed: 2014-12-24 01:24:17 EST
Type: Bug
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Description Vijaykumar Koppad 2013-07-17 02:28:57 EDT
Description of problem: If there are multiple bricks of different sub-volume in the same machine, geo-rep syncs from all the replica pairs. 

Volume info, 

Volume Name: master
Type: Distributed-Replicate
Volume ID: 45ad14e4-2724-42b8-ba75-f9037126d13c
Status: Started
Number of Bricks: 3 x 2 = 6
Transport-type: tcp
Brick1: machine1:/bricks/brick1
Brick2: machine2:/bricks/brick2
Brick3: machine3:/bricks/brick3
Brick4: machine4:/bricks/brick4
Brick5: machine2:/bricks/brick5
Brick6: machine3:/bricks/brick6

Version-Release number of selected component (if applicable):

How reproducible:Happens every time

Steps to Reproduce:
1.Create and start a geo-rep session between master( config as shown above) and slave
2.create some files in the master.
3.Check the geo-rep logs in DEBUG mode, to check it is syncing from which bricks.

Actual results: Geo-rep syncs from all the replica bricks.

Expected results: geo-rep actually should sync from only one replica brick. One acting as active and another as passive. 

Additional info:
logs from machine1
[2013-07-17 11:38:57.405512] D [repce(/bricks/brick1):175:push] RepceClient: call 12918:140297598121728:1374041337.41
entry_ops([{'gfid': 'ec87093b-6ea0-41a5-9383-8bfcd659ff95', 'entry': '.gfid/00000000-0000-0000-0000-000000000001/file5
', 'stat': {'gid': 0, 'uid': 0, 'mode': 33188}, 'op': 'CREATE'}, {'gfid': '99aa70c2-160c-4bee-bd14-12396fc843c7', 'ent
ry': '.gfid/00000000-0000-0000-0000-000000000001/file6', 'stat': {'gid': 0, 'uid': 0, 'mode': 33188}, 'op': 'CREATE'},
 {'gfid': 'a6176f29-af26-4e93-b14e-32d63244c957', 'entry': '.gfid/00000000-0000-0000-0000-000000000001/file8', 'stat':
 {'gid': 0, 'uid': 0, 'mode': 33188}, 'op': 'CREATE'}],) ...

logs from machine2
[2013-07-17 11:39:03.993156] D [master(/bricks/brick2):896:process_change] _GMaster: entries: [{'gfid': 'ec87093b-6ea0-41a5-9383-8bfcd659ff95', 'entry': '.gfid/00000000-0000-0000-0000-000000000001/file5', 'stat': {'gid': 0, 'uid': 0, 'mode': 33188}, 'op': 'CREATE'}, {'gfid': '99aa70c2-160c-4bee-bd14-12396fc843c7', 'entry': '.gfid/00000000-0000-0000-0000-000000000001/file6', 'stat': {'gid': 0, 'uid': 0, 'mode': 33188}, 'op': 'CREATE'}, {'gfid': 'a6176f29-af26-4e93-b14e-32d63244c957', 'entry': '.gfid/00000000-0000-0000-0000-000000000001/file8', 'stat': {'gid': 0, 'uid': 0, 'mode': 33188}, 'op': 'CREATE'}]

you can see, both brick1 and brick2 are syncing same files, which are actually replica pairs.
Comment 2 Amar Tumballi 2013-08-01 06:20:07 EDT
reducing priority because of use-case not being very practical. (!optimal setup)
Comment 4 Aravinda VK 2014-12-24 01:24:17 EST
Not a relevant deployment scenario to have bricks from the same replica group in the same node. Hence closing this.

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