[SERVER-58241] Overlap fetching of `_xferMods` from the donor with applying them on the recipient Created: 02/Jul/21  Updated: 29/Oct/23  Resolved: 28/Jul/21

Status: Closed
Project: Core Server
Component/s: Sharding
Affects Version/s: None
Fix Version/s: 5.1.0-rc0

Type: Task Priority: Major - P3
Reporter: Kaloian Manassiev Assignee: Allison Easton
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Gantt Dependency
has to be done before SERVER-58217 Apply the updates from `_xferMods` in... Closed
has to be done before SERVER-58218 Apply the deletes from `_xferMods` in... Closed
has to be done after SERVER-58211 Deduplicate entries returned in a sin... Closed
Backwards Compatibility: Fully Compatible
Sprint: Sharding EMEA 2021-07-26, Sharding EMEA 2021-08-09
Participants:

 Description   

Currently, the recipient synchronously fetches _xferMods from the donor and then applies them. We can achieve much higher throughput if we make the application overlapped with fetching, similar to the clone path. That way the donor can be sending the mods concurrently with the recipient applying them.



 Comments   
Comment by Vivian Ge (Inactive) [ 06/Oct/21 ]

Updating the fixversion since branching activities occurred yesterday. This ticket will be in rc0 when it’s been triggered. For more active release information, please keep an eye on #server-release. Thank you!

Comment by Githook User [ 28/Jul/21 ]

Author:

{'name': 'Allison Easton', 'email': 'allison.easton@mongodb.com'}

Message: SERVER-58241 Overlap fetching of `_xferMods` from the donor with applying them on the recipient
Branch: master
https://github.com/mongodb/mongo/commit/bc4a9b441a3526e9703f5da0e1fb250dda15d867

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