openstack
/
tripleo-ci
Code Issues Proposed changes

Increase disk_allocation_ratio to 4 

With a max of 60 envs, we're starting to hit scheduling errors due
to lack of disk space on some of the compute nodes.  In reality,
none of the compute nodes are using more than 61% of their disk
and most are under 50%, so a 33% increase in overcommit should be
safe enough.

We may also want to increase the scheduler retries to help with
this problem.  Part of the issue is that most of the compute nodes
have sufficient disk available, but if we happen to get unlucky and
pick three in a row that don't then the instance fails.  More
scheduler retries would help with that.

Change-Id: Ifb2db1ddafd183aa4c9584b406e3b47bf7b0c5a9
This commit is contained in:
Ben Nemec 2016-09-29 18:20:49 +00:00
parent 17f4c8673d
commit 26e940c68f
1 changed files with 1 additions and 1 deletions
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2
scripts/rh1-env.yaml
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@ -13,7 +13,7 @@ parameter_defaults:
neutron::network_device_mtu: 1500
# rh2 disks are small, we're relying on the fact that CI jobs at different stages wont
# ever use peak disk usage together (also they don't use all thats allocate in the flavor)
nova::scheduler::filter::disk_allocation_ratio: 3
nova::scheduler::filter::disk_allocation_ratio: 4
# More than 4 Heat engine workers allows Heat to essentially DoS the other services
# if a lot of jobs come in at once. This is borrowed from
# worker-config-mitaka-and-below.yaml. Once rh1 is on a newer release we should