[SERVER-31959] Update HostTypeRequirements for $changeStream stages that run on mongoS Created: 14/Nov/17  Updated: 06/Dec/22  Resolved: 17/Nov/17

Status: Closed
Project: Core Server
Component/s: Aggregation Framework
Affects Version/s: None
Fix Version/s: None

Type: Improvement Priority: Minor - P4
Reporter: Bernard Gorman Assignee: Backlog - Query Team (Inactive)
Resolution: Won't Fix Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Assigned Teams:
Query
Backwards Compatibility: Fully Compatible
Participants:

 Description   

Following SERVER-31763 and SERVER-30834, there are no longer any circumstances in which we forward a complete $changeStream pipeline from mongoS to a single shard. Since all $changeStream pipelines issued to a mongoS must now split and be merged locally, the HostTypeRequirement for all post-split stages should be changed to kLocalOnly.



 Comments   
Comment by David Storch [ 15/Nov/17 ]

bernard.gorman, I'm not convinced that this is high priority compared to our other work. I'm going to move this back to the Needs Triage queue. Please hold off for now.

Comment by Bernard Gorman [ 15/Nov/17 ]

david.storch: yep, I think this should be scheduled now that SERVER-30834 is resolved. It's a trivial change so I've assigned it to myself for this sprint.

Comment by David Storch [ 14/Nov/17 ]

bernard.gorman, should this be in the "Needs Triage" queue? This looks like something that we should either schedule now, or close as Won't Fix.

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