25 lines
1.4 KiB
YAML
25 lines
1.4 KiB
YAML
---
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prelude: >
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Certain performance enhancements when deploying Neutron with Ubuntu
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Trusty Tahr were found and should be used. Additionally, utilizing
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the Octavia Neutron-LBaaS driver has some performance considerations
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to be aware of during deployment.
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issues:
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- The stock Ubuntu Trusty Tahr kernel (3.13) shows linear performance
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degradation when running "ip netns exec" as the number of namespaces
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increases. In cases where scale is important, a later version kernel
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(e.g. 3.19) should be used. This regression should be fixed in Trusty
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Tahr since 3.13.0-36.63 and later kernel versions. For more information,
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please see `Launchpad bug 1328088.
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<https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1328088>`_
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- Creating Neutron-LBaaS load balancers in environments without hardware
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virtualization may be slow when using the Octavia driver. This is due to
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QEMU using the TCG accelerator instead of the KVM accelerator in
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environments without hardware virtualization available. We recommend
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enabling hardware virtualization on your compute nodes, or enabling nested
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virtualization when using the Octavia driver inside a virtual environment.
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See `this link explaining devstack with nested KVM
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<http://docs.openstack.org/developer/devstack/guides/devstack-with-nested-kvm.html>`_
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for details on setting up nested virtualization for DevStack running inside
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KVM.
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