[DOCS-15380] [Live Migration]Add IOPS considerations in Live Migration documentation Created: 31/May/22  Updated: 01/Jun/22  Resolved: 01/Jun/22

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

Type: Feedback Priority: Major - P3
Reporter: Aditya Srivastava Assignee: Unassigned
Resolution: Won't Do Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:
Days since reply: 1 year, 36 weeks ago

 Description   

Description

During the push-based live migration of the client([Ignite sales|https://mongodb.lightning.force.com/lightning/r/Account/001A000001B7WXAIA3/view),] the Live migration(Push) method slowed down the application queries and started causing time outs in the application side.

This was happening because the client was using gp2 EBS volume with 350GB storage and once the migration was started the read IOPS peaked from 500/sec to 2.5k/sec however after the burst window it came down to 500 IOPS again. Once that happened the entire production cluster slowed down and the disk latency and disk queue depth increased significantly. 

Changes

The ask here is to include this IOPS consideration in the considerations section of the live migration(ref - https://www.mongodb.com/docs/atlas/import/migrate-from-com-rs/#considerations) as it is a pretty critical check while running the production migration and can cause significant downtime.

Screenshot -

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 Comments   
Comment by Aditya Srivastava [ 01/Jun/22 ]

incorrectly opened this instead of DOCSP ticket, withdrawing and opening a new one.

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