[DOCS-12513] Docs for SERVER-39418: Ban atClusterTime with enableMajorityReadConcern:false Created: 25/Feb/19  Updated: 13/Nov/23  Resolved: 22/May/19

Status: Closed
Project: Documentation
Component/s: manual, Server
Affects Version/s: None
Fix Version/s: 4.1.9, Server_Docs_20231030, Server_Docs_20231106, Server_Docs_20231105, Server_Docs_20231113

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-39418 Ban atClusterTime with enableMajority... Closed
Related
is related to DOCS-12523 4.2: transactions supported on sharde... Closed
Participants:
Days since reply: 4 years, 38 weeks ago
Epic Link: DOCS: 4.2 Server/Tools

 Description   

Description

Description:

We will no longer support 'atClusterTime' with enableMajorityReadConcern:false. The external-facing implication of this is that:

  • in 4.2 with enableMajorityReadConcern:false, we will not support transactions in sharded clusters with readConcern level 'snapshot'. Done as part of earlier ticket. but need to update error message
  • (Note that 4.0 does not support transactions in sharded clusters at all, and 4.2 with enableMajorityReadConcern:false only supports single-shard transactions.) Done as part of earlier ticket.
  • 4.0 users should be cautioned that if they are using enableMajorityReadConcern:false and single replica set transactions, then they may wish to avoid readConcern level 'snapshot' if they may transition to using a sharded cluster in 4.2, since this will break their application.
  • In 4.2 with enableMajorityReadConcern:false, single-shard transactions will support readConcern levels 'local' and 'majority'.

Engineering Ticket Description:

This means that single-shard transactions on enableMajorityReadConcern:false shards cannot be run with readConcern level snapshot.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

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



 Comments   
Comment by Githook User [ 22/May/19 ]

Author:

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

Message: DOCS-12513: 4.2 sharded txn enableMajorityReadConcern: false
Branch: master
https://github.com/mongodb/docs/commit/219701e7fcbffcaeb74dc633f58b2fc44c170d52

Generated at Thu Feb 08 08:05:25 UTC 2024 using Jira 9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66.