[SERVER-59078] Implement 'merging' expressions for accumulators Created: 03/Aug/21  Updated: 13/Oct/21  Resolved: 13/Oct/21

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

Type: Task Priority: Major - P3
Reporter: Ian Boros Assignee: Yoon Soo Kim
Resolution: Won't Fix Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:

 Description   

In addition to the accumulators 'accumulate' and 'finalize' steps, we'll need a way to 'merge' two accumulated states. This is necessary to implement a naive version of spilling (via sorted files or unsorted files) as well as sharding.

Support for this should be added to the stage builder for accumulators.



 Comments   
Comment by Eric Cox (Inactive) [ 13/Oct/21 ]

Closing since the spilling implementation can do without this.

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