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Even number across racks #906

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merged 10 commits into from Mar 22, 2016

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@Calvinp
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Calvinp commented Feb 19, 2016

When scaling a rackSensitive request, it is best to scale to a number of instances that is a multiple of the number of racks to evenly spread load across each rack.

With this change, if scaling is selected but the target number of instances is not a multiple of the number of racks, a new dialog will pop up notifying the user of this fact. It has radio buttons to choose between the number they entered, the multiple one lower than the number they entered (but 0 is never suggested), and the multiple one higher than the one they entered.
So, if there are 3 racks and the user tries to scale to 5 instances, they will be prompted to choose between 3, 5 and 6 instances.
The radio button corresponding to the number the user entered is selected by default, so if the user fat fingers the ok button they will still get what they originally wanted.

@tpetr tpetr modified the milestone: 0.4.12 Feb 23, 2016

Calvinp and others added some commits Mar 14, 2016

Enable opt out of even number across racks.
Adds a parameter to SingularityRequest to opt out of suggesting even numbers across racks, and the UI listens to this.
Also when creating or updating requests through the UI, there is a checkbox to toggle this
Added checkbox to even number of tasks hint to disable the hint for e…
…veryone for this request forever, and made the checkbox for this in the edit form field remember current state
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ssalinas Mar 22, 2016

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This should be gtg now that we can optionally opt out of the messages, thanks @Calvinp

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ssalinas commented Mar 22, 2016

This should be gtg now that we can optionally opt out of the messages, thanks @Calvinp

ssalinas added a commit that referenced this pull request Mar 22, 2016

@ssalinas ssalinas merged commit d66f81c into master Mar 22, 2016

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@ssalinas ssalinas deleted the even_number_across_racks branch Mar 22, 2016

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