[DOCS-13725] "Cursor Snapshot" documentation is outdated and only applies to MMAP Created: 23/Jun/20  Updated: 30/Oct/23  Resolved: 23/Mar/21

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: Server_Docs_20231030

Type: Task Priority: Major - P3
Reporter: Louis Williams Assignee: Naomi Pentrel (Inactive)
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Related
Participants:
Days since reply: 2 years, 46 weeks, 1 day ago
Epic Link: DOCSP-1769
Story Points: 1

 Description   

Description

This Cursor Snapshot section on read isolation refers to behavior that only existed in MMAP.

This paragraph should be deleted since it is no longer applicable:

If your collection has a field or fields that are never modified, you can use a unique index on this field or these fields so that the query will return each document no more than once. Query with hint() to explicitly force the query to use that index.

I think we should replace it with this, instead:

Queries that use unique indexes can, in some cases, return duplicate values. If a cursor using a unique index interleaves with a delete and insert of documents sharing the same unique value, the cursor may return the same unique value twice, but from different documents.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)



 Comments   
Comment by Githook User [ 23/Mar/21 ]

Author:

{'name': 'Naomi Pentrel', 'email': '5212232+npentrel@users.noreply.github.com', 'username': 'npentrel'}

Message: DOCS-13725 update cursor snapshot documentation
Branch: v3.6
https://github.com/mongodb/docs/commit/a742cc43bc30bf0186e6aa69255f4527ecabdf94

Comment by Githook User [ 23/Mar/21 ]

Author:

{'name': 'Naomi Pentrel', 'email': '5212232+npentrel@users.noreply.github.com', 'username': 'npentrel'}

Message: DOCS-13725 update cursor snapshot documentation
Branch: v4.0
https://github.com/mongodb/docs/commit/a8f23e8d7b70d2a4892ec0ce84ec4033b35bee29

Comment by Githook User [ 23/Mar/21 ]

Author:

{'name': 'Naomi Pentrel', 'email': '5212232+npentrel@users.noreply.github.com', 'username': 'npentrel'}

Message: DOCS-13725 update cursor snapshot documentation
Branch: v4.2
https://github.com/mongodb/docs/commit/1528620be653152a0008378a5591fce74d0a54a7

Comment by Githook User [ 23/Mar/21 ]

Author:

{'name': 'Naomi Pentrel', 'email': '5212232+npentrel@users.noreply.github.com', 'username': 'npentrel'}

Message: DOCS-13725 update cursor snapshot documentation
Branch: master
https://github.com/mongodb/docs/commit/d00c93d4f6efdaa9cec464acf94223184e43c7b1

Comment by Githook User [ 23/Mar/21 ]

Author:

{'name': 'Naomi Pentrel', 'email': '5212232+npentrel@users.noreply.github.com', 'username': 'npentrel'}

Message: DOCS-13725 update cursor snapshot documentation
Branch: v5.0
https://github.com/mongodb/docs/commit/6b5ad56618001208c287741c41156edd10a6c15f

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