[DOCS-2324] Add note to Filesystem Snapshot Documentation regarding optional fsyncLock Created: 29/Nov/13  Updated: 13/Nov/23  Resolved: 12/Feb/15

Status: Closed
Project: Documentation
Component/s: manual
Affects Version/s: None
Fix Version/s: v1.3.18, Server_Docs_20231030, Server_Docs_20231106, Server_Docs_20231105, Server_Docs_20231113

Type: Improvement Priority: Major - P3
Reporter: Adam Comerford Assignee: Sam Kleinman (Inactive)
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:
Days since reply: 9 years, 6 days ago

 Description   

This page describes a good general procedure:

http://docs.mongodb.org/manual/tutorial/backup-sharded-cluster-with-filesystem-snapshots/

However, regarding taking the snapshot itself, the more specific case where the user has the capability to do a filesystem snapshot which guarantees point in time consistency at the filesystem level (and includes the journal) makes the use of the fsyncLock/unLock an unnecessary step.

Adding a note something like this as part of that step would help avoid confusion here:

Note: Generally, locking/freezing the instance is required. However, if you have filesystem level point in time snapshot capability (Amazon's EBS, LVM, and other snapshot technologies provide this), and that snapshot includes both the MongoDB data and the journal, it is not necessary to fsync and lock the database to obtain a usable snapshot.



 Comments   
Comment by Githook User [ 12/Feb/15 ]

Author:

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

Message: DOCS-2324: fsync lock recomendation in sharded cluster backup
Branch: v2.6
https://github.com/mongodb/docs/commit/0891f7b61600a457f3eba7a8bbf3d77cc756df7a

Comment by Githook User [ 12/Feb/15 ]

Author:

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

Message: DOCS-2324: fsync lock recomendation in sharded cluster backup
Branch: master
https://github.com/mongodb/docs/commit/819999e90a7db555c0ad67a86cc98aceb8a3df5f

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