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From "Tony Dong (JIRA)" <>
Subject [jira] [Commented] (AURORA-1258) Improve procedure for adding instances to a job
Date Tue, 19 Jan 2016 22:56:39 GMT


Tony Dong commented on AURORA-1258:

[~maximk] I haven't put in that much work into it so far and I don't think I have time in
the near future to work on it. So please feel free to take it over from scratch :) 
Please loop me into the reviews as well, I'm interested in this work getting done. 

> Improve procedure for adding instances to a job
> -----------------------------------------------
>                 Key: AURORA-1258
>                 URL:
>             Project: Aurora
>          Issue Type: Story
>          Components: Reliability, Usability
>            Reporter: Joe Smith
>            Assignee: Tony Dong
> The current process for adding instances to a job is highly manual, and potentially dangerous.
> 1. Take a config for a job with 10 instances, update it to 20 instances.
> 2. The batch size will be increased, and users will need to specify shards 10 to 19.
> 3. After this update is complete, users will need to manually update shards 0-9 again.
> There may be other changes pulled in as part of this update other than just increasing
the number of instances, which could further complicate things.
> One possible improvement would be to change the updater from 'under-provision' where
it kills instances first, then schedules new instances, to an 'over-provision' where it adds
on new instances, then backpedals and kills the old instances.
> Overall, a single command or process for a user to take an already-existing job and increase
the number of instances would reduce overhead and fat-fingering.

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