Reviewed: https://review.openstack.org/293976
Committed:
https://git.openstack.org/cgit/openstack/neutron/commit/?id=9355885d7dab41e48a8ecaaf59b1bd3835f17f27
Submitter: Jenkins
Branch: master
commit 9355885d7dab41e48a8ecaaf59b1bd3835f17f27
Author: Kevin Benton <ke...@benton.pub>
Date: Wed Mar 16 10:43:25 2016 -0700
Fetch router port subnets in bulk
When a router port is being attached to a network it
must first check that the new subnet(s) do not overlap
with any of the other subnets the router is already
attached to.
The previous code was calling the core plugin to look
up each attached subnet individually. This led to slow
responses if a router was attached to hundreds of other
subnets.
This patch just adjusts the logic to request all of the
subnets from the core plugin in one call so the number
of DB calls stays constant regardless of attached subnet
count.
Change-Id: I36a2b23b089269bb51ce3dc271c944b48fca8781
Closes-Bug: #1558101
** Changed in: neutron
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1558101
Title:
Neutron performance degradation when multiple subnets attached to same
router
Status in neutron:
Fix Released
Bug description:
Hello
In our stress test, Neutron has performance degradation when
multiple subnets are added to the same router.
I am attaching script to reproduce this bug.
This script does the following:
1. creates a ROUTER-1
2. Create 10 networks titled: NETWORK-X
2.1 Create 100 Subnets for each NETWORK-X and attach subnets to ROUTER-1
using the neutron.add_interface_router()
Here is the result for the first 500 subnets:
Time spend to create 100 subnets: 281 seconds
Time spend to create additional 100 subnets: 594 seconds
Time spend to create additional 100 subnets: 912 seconds
Time spend to create additional 100 subnets: 1191 seconds
Time spend to create additional 100 subnets: 1464 seconds
-----------------
Total time to create 500 subnets is 74 minutes.
When it took only 10 minutes to create first 100 subnets and link to router.
To be able to run the test I had to disable quota and restart q-svc.
From my neutron config file: /etc/neutron/neutron.conf
[quotas]
default_quota = -1
quota_network = -1
quota_subnet = -1
track_quota_usage = false
quota_router = -1
quota_floatingip = -1
quota_security_group = -1
quota_security_group_rule = -1
I am using regular all in one devstack installation using the l2/l3
agent.
Linux is Ubuntu 14.04.3 LTS
This is my local.config file:
-----------------
[[local|localrc]]
NETWORK_GATEWAY=10.0.0.1
PUBLIC_NETWORK_GATEWAY=10.100.100.8
Q_FLOATING_ALLOCATION_POOL=start=10.100.201.200,end=10.100.201.230
RABBIT_PASSWORD=pwd123
SERVICE_PASSWORD=pwd123
SERVICE_TOKEN=pwd123
ADMIN_PASSWORD=pwd123
DATABASE_PASSWORD=pwd123
disable_service n-net
disable_service tempest
enable_service heat
enable_service h-eng h-api h-api-cfn h-api-cw
enable_service q-agt
enable_service q-dhcp
enable_service q-l3
enable_service q-meta
enable_service q-svc
FIXED_NETWORK_SIZE=256
FIXED_RANGE=10.0.0.0/24
FLAT_INTERFACE=eno1
FLOATING_RANGE=10.100.0.0/16
HOST_IP=10.100.100.8
---------
Thanks and best regards,
Yuli
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