Description of problem:
Would it be possible to backport the following patches from Liberty to Mitaka?
https://blueprints.launchpad.net/nova/+spec/libvirt-aio-mode
Version-Release number of selected component (if applicable):
How reproducible:
When trying to set aio=native in RHOSP 8, it's no longer setting aio=native as per the previously merged patches that supported this :
[workarounds]
# Specific IO policies to use for different disk types
# e.g: file=threads,network=native (list value)
# This should not be required when nova auto selects the
# most appropriate (http://bugzilla.redhat.com/865337),
# or likewise qemu (http://bugzilla.redhat.com/1175440)
#rhosp_disk_io_policies=
rhosp_disk_io_policies=file=threads,network=native
Steps to Reproduce:
1. Install RHOSP 8.0
2. Try to set aio=native on disks to tweak performances
3.
Actual results:
No longer supported
Expected results:
Should be supported
Additional info:
This looks like a regression. There's the libvirt option disk_cachemodes but it doesn't set the aio=native mode we need.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2016-2713.html