[DOCS-2485] Backup of a sharded cluster should not require config server shutdown Created: 07/Jan/14  Updated: 17/Feb/15  Resolved: 05/Mar/14

Status: Closed
Project: Documentation
Component/s: manual
Affects Version/s: None
Fix Version/s: v1.3.2

Type: Task Priority: Major - P3
Reporter: Osmar Olivo Assignee: Bob Grabar
Resolution: Done Votes: 0
Labels: sprint-rollover
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:
Days since reply: 9 years, 50 weeks ago

 Description   

When describing the steps for backing up a sharded cluster, we mention that turning off one of the config servers prior to a mongodump is the best practice.

In fact there isn't really a need to shutdown a config server as long as the balancer is disabled. Turning on and off of config servers can cause other issues in the cluster regarding balancing and availability.

Currently i can find this being stated at http://docs.mongodb.org/manual/tutorial/backup-sharded-cluster-with-filesystem-snapshots/

But I suspect it may be rolling around in multiple places as well.



 Comments   
Comment by Githook User [ 05/Mar/14 ]

Author:

{u'username': u'tychoish', u'name': u'Sam Kleinman', u'email': u'samk@10gen.com'}

Message: DOCS-2485: edits to sharded cluster backup procedure
Branch: master
https://github.com/mongodb/docs/commit/342060dc5e88c6b87f5a7f3f47b3fa9388340022

Comment by Githook User [ 05/Mar/14 ]

Author:

{u'username': u'tychoish', u'name': u'Sam Kleinman', u'email': u'samk@10gen.com'}

Message: DOCS-2485: edits to sharded cluster backup procedure
Branch: v2.4
https://github.com/mongodb/docs/commit/a1f36ad0c29819dbbd5e18c6dc8e84b8f14fba73

Comment by Githook User [ 05/Mar/14 ]

Author:

{u'username': u'bgrabar', u'name': u'Bob Grabar', u'email': u'bob.grabar@10gen.com'}

Message: DOCS-2485 back up of cluster does not require config server shutdown

Signed-off-by: Sam Kleinman <samk@10gen.com>
Branch: master
https://github.com/mongodb/docs/commit/9d012575df05575ec374f176f0be5a5a223fe09f

Comment by Githook User [ 05/Mar/14 ]

Author:

{u'username': u'bgrabar', u'name': u'Bob Grabar', u'email': u'bob.grabar@10gen.com'}

Message: DOCS-2485 back up of cluster does not require config server shutdown

Signed-off-by: Sam Kleinman <samk@10gen.com>
Branch: v2.4
https://github.com/mongodb/docs/commit/f6ec245b9b76353d11da8490be7cbf86f293d5e1

Comment by Scott Hernandez (Inactive) [ 04/Feb/14 ]

Compared to other options doing a shutdown of the 2/3rd config server was the best suggestion. Using fsync+lock has serious issues.

Disabling the balancer is not sufficient to freeze the metadata for all versions to take the backup.

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