[DOCS-2793] Document that sharded clusters don't support covered queries Created: 25/Feb/14  Updated: 21/Dec/14  Resolved: 28/Feb/14

Status: Closed
Project: Documentation
Component/s: manual
Affects Version/s: None
Fix Version/s: v1.3.1

Type: Bug Priority: Major - P3
Reporter: J Rassi Assignee: Sam Kleinman (Inactive)
Resolution: Done Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Related
related to SERVER-5022 full document always loaded for match... Closed
Participants:
Days since reply: 9 years, 51 weeks, 1 day ago

 Description   

Add to limitations of sharded clusters: queries against sharded collections will never be covered.

(This is because mongod always checks whether it owns the chunk that the document is in before returning it as part of a query, and that process always does fetch of the document from disk)


Generated at Thu Feb 08 07:44:16 UTC 2024 using Jira 9.7.1#970001-sha1:2222b88b221c4928ef0de3161136cc90c8356a66.