[DOCS-11149] Be more clear about the impact of configuration changes on an Atlas cluster Created: 21/Dec/17  Updated: 29/Oct/23  Resolved: 30/Jan/18

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

Type: Improvement Priority: Major - P3
Reporter: Joanna Cheng Assignee: Robert Justice (Inactive)
Resolution: Fixed Votes: 1
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Related
Participants:
Days since reply: 6 years, 2 weeks ago
Epic Link: DOCSP-1743

 Description   

https://docs.atlas.mongodb.com/scale-cluster/#migration-downtime-and-performance-impact

This seems a bit too soft
"Some configuration changes, such as changing the instance size, require migration to new servers. Depending on the amount of data to migrate, migrations can take a significant amount of time."

Suggest something like:
"Making changes to an cluster (like the disk size, IOPS, or instance size) will likely involve migrating to new servers and/or volumes, which can take a long time. However, in some special cases we're able to make certain changes more quickly."

Not that exact wording, but something along those lines



 Comments   
Comment by Robert Justice (Inactive) [ 31/Jan/18 ]

Ravind merged!

Comment by Shannon Bradshaw (Inactive) [ 21/Dec/17 ]

joanna.cheng, from reading the HELP ticket, it looks like the issue is that IOPS change requested triggered a special case for which AWS would not permit a change to the instance. So, in order to satisfy the customer request, we had to migrate their cluster to new instances. Is that a correct read of this issue?

If so, I believe we should document (as best we can) the scenarios that will trigger a migration and provide some guidance to the reader as to how long this might take (i.e. hours, not minutes). That should provide them with the ability to plan better, I believe. Thoughts on that?

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