[DOCS-10838] Docs for SERVER-31032: Secondaries should default to 'available' read concern level when one is not specified Created: 27/Sep/17  Updated: 29/Oct/23  Resolved: 22/Nov/17

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: 3.5.14, 3.6.0-rc0

Type: Task Priority: Major - P3
Reporter: Kay Kim (Inactive) Assignee: Kay Kim (Inactive)
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Documented
documents SERVER-31032 Secondaries should default to 'availa... Closed
Related
is related to DOCS-11001 Docs for SERVER-30593: Add 'available... Closed
Participants:
Days since reply: 6 years, 12 weeks ago
Epic Link: DOCS: 3.6 Server

 Description   

Documentation Request Summary:

Secondary request's read concern level defaults to 'available' when neither 'afterClusterTime' nor 'level' is specified.

Put another way, when 'afterClusterTime' is specified, 'level' is always promoted to 'local' if not specified. And secondary requests default to 'available' level when unspecified.

Engineering Ticket Description:

Currently the 'shardVersion' of a request is only ignored when 'available' read concern is set in that request. So the default is 'local' read concern when none is specified. This is desirable on primaries, but we wish to maintain v3.4 behavior on secondaries by defaulting to 'available' when none is specified.

Update: the exception to a secondary request's default to 'available' read concern level is when afterClusterTime is specified without a level, in which case the default should be 'local'. As per SPEC-929.



 Comments   
Comment by Githook User [ 22/Nov/17 ]

Author:

{'name': 'kay', 'username': 'kay-kim', 'email': 'kay.kim@10gen.com'}

Message: DOCS-11001,DOCS-10838 read concern available
Branch: master
https://github.com/mongodb/docs/commit/2366a34d65a2e094c4a59cc03866a819fb5802b5

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