Description

Description of Linked Ticket

WiredTiger recently completed an investigation of the feasibility of removing enableMajorityReadConcern:false now that WT has durable history. After reviewing the findings of that investigation, we are moving forward with Removing Support for enableMajorityReadConcern:false. Durable History addresses cache pressure concerns around majority commit point lag allowing for the removal of eMRC:false (a mode of operation that does not allow distributed transactions and other features).

We need to disable support for eMRC:false as a first step.

In a future release, we will fully remove support for eMRC:false.

Scope of changes

Review https://docs.mongodb.com/manual/reference/read-concern-majority/#disable-read-concern-majority and possibly other mentions?

One approach might be to replace that section with a blurb like 'Starting in MDB 5.0, you can't do this. If you're an older version, refer to those docs to see how to disable maj RC."

Impact to Other Docs

https://docs.mongodb.com/manual/reference/configuration-options/index.html#replication.enableMajorityReadConcern

https://docs.mongodb.com/manual/reference/program/mongod/index.html#cmdoption-mongod-enablemajorityreadconcern

https://docs.mongodb.com/manual/core/transactions/index.html#disabled-read-concern-majority

https://docs.mongodb.com/manual/core/transactions-production-consideration/index.html#member-primary-secondary-arbiter-architecture

Does this also apply to the replication / sharding settings / parameters?

https://docs.mongodb.com/manual/reference/configuration-options/#replication.enableMajorityReadConcern

https://docs.mongodb.com/manual/core/transactions-sharded-clusters/index.html#three-member-primary-secondary-arbiter-shards

https://docs.mongodb.com/manual/tutorial/change-sharded-cluster-wiredtiger/index.html#psa-3-member-architecture

https://docs.mongodb.com/manual/tutorial/change-replica-set-wiredtiger/index.html#psa-3-member-architecture

MVP (Work and Date)

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