In RHEL-OSP 7.0, a new weighter that filters hosts in accordance with IO ops is now available, and must be documented. BluePrint - https://blueprints.launchpad.net/nova/+spec/io-ops-weight This weighter must be described in "3.5.2.1. Configure Weight Options for Hosts" in the Administration Guide to be pulled over to the "Managing Instances and Images" guide when that guide is ready.
Assigning to Radek for review. Radek - this is another Nova bug, and the changes can be applied to the content in the Administration Guide for now.
Russell, Is the following description technically correct? * nova.scheduler.weights.io_ops - Weighs the host's workload. ... Weigher:io_ops Option: [DEFAULT] io_ops_weight_multiplier Description: Filters hosts by their I/O load (floating point). By default, io_ops_weight_multiplier=-1.0. If using a negative number, hosts with a lighter workload are given preference. A positive number prioritizes hosts with a heavier workload. Anything more you would add to the docs?
sbauza is the best person to ask for review of scheduler features
Hey Radek, That's correct, as it's a weigher, it will prefer the hosts having the less IO Ops if the multiplier is negative.
*** Bug 1175965 has been marked as a duplicate of this bug. ***
Assigning Don as the QA contact. Don, could you take a look at the newly added content?
New entry for io_ops is good to go; merged.
This content is now live on the Customer Portal. Closing.