[MESOS-3090] Calculated CPU should be rounded

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Assignee: Unassigned
• Reporter: Andrew Jorgensen
• Created: 20/Jul/15 20:48
• Updated: 23/Nov/15 20:10
• Resolved: 23/Nov/15 20:09

Description

My mesos worker pool consists of 4 core machines in AWS. When I look at the calculated amount of CPU that each machine is offering it looks like

"name":"cpus",
"scalar":3.9999999999999973

It feels like this number should be rounded up to the nearest thousands so that a job does not need to specify 3.9 CPU but can just specify the full 4.

This can be remedied by adding the following to the worker machines:

--resources='cpus:4'

But this would be hard to manage if the worker pool is at all heterogenous.

Issue Links

• duplicates: MESOS-3552 CHECK failure due to floating point precision on reservation request
• is related to: MESOS-1187 precision errors with allocation calculations
• is related to: MESOS-3997 Switch to fixed-point for resources