[DOCS-11167] ReadConcern=local/majority improves reads to secondaries in sharded clusters Created: 05/Jan/18  Updated: 27/Oct/23  Resolved: 20/Aug/19

Status: Closed
Project: Documentation
Component/s: drivers
Affects Version/s: 3.6 Required
Fix Version/s: None

Type: Improvement Priority: Major - P3
Reporter: Yaoxing Zhang Assignee: Unassigned
Resolution: Gone away Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:
Days since reply: 6 years, 5 weeks, 6 days ago
Story Points: 0.3

 Description   

In our documents about ReadPreference said:

For queries of sharded collections, for clusters with the balancer active, secondaries may return stale results with missing or duplicated data because of incomplete or terminated chunk migrations.

Beginning in 3.6, this is still true by default. However, we now have readConcern=local/majority which makes secondaries "chunk aware".


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