[DOCS-474] Documentation on concurrency doesn't include information on concurrency in r2.2 Created: 31/Aug/12  Updated: 10/Dec/12  Resolved: 08/Dec/12

Status: Closed
Project: Documentation
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Bug Priority: Major - P3
Reporter: William Zola Assignee: Sam Kleinman (Inactive)
Resolution: Done Votes: 1
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
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Participants:
Days since reply: 11 years, 10 weeks, 2 days ago

 Description   

Documentation should cover concurrency and locking information for MongoDB 2.2.

This should probably include a table indicating the lock level required for various operations.



 Comments   
Comment by auto [ 10/Dec/12 ]

Author:

{u'date': u'2012-12-08T20:12:07Z', u'email': u'samk@10gen.com', u'name': u'Sam Kleinman'}

Message: DOCS-474 adding version changed notes
Branch: master
https://github.com/mongodb/docs/commit/398c7bd1e0e30841ffa10c2563f7f95874817a50

Comment by Sam Kleinman (Inactive) [ 08/Dec/12 ]

added a couple of version changed notes. The manual explicitly documents 2.2.x+, and will note when things were introduced in 2.x (and in some cases 2.0, for some behaviors) but to provide consistency, will not (and should not) document previous behavior to prevent confusion and abstruse information presentation...

Comment by William Zola [ 07/Dec/12 ]

I note that both these sections have paragraphs marked 'changed in version 2.2':

Since folks will be using 2.0 for some time to come, I think that these are a good idea. I don't see why this shouldn't apply to the section on replication as well.

Comment by Scott Hernandez (Inactive) [ 07/Dec/12 ]

The manual is versioned at the current version (2.2+) and we are not writing versions for old releases.

Comment by William Zola [ 07/Dec/12 ]

Information in the last section ( http://docs.mongodb.org/manual/faq/concurrency/#how-does-concurrency-affect-secondaries) is correct for version 2.2, but not correct for version 2.0.

In version 2.0, operations are read individually off the oplog and applied serially to the secondary.

Comment by Sam Kleinman (Inactive) [ 07/Dec/12 ]

new page: http://docs.mongodb.org/manual/faq/concurrency/

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