e5ae4c0860
One of two patches that fixes bug #1194438. In the iptables firewall driver, each port method (update_port_filter, prepare_port_filter, remove_port_filter) makes O(N) calls, where N=len(firewall.ports), to IptablesManager methods that update dozens of data structures. When the firewall methods are called in sequence, e.g., by SecurityGroupAgentRpcMixin, the calls to IptablesManager's methods start to add up. This patch changes IptablesFirewallDriver to defer and coalesce calls to IptablesManager. Now a sequence of M port method calls results in O(N) calls to IptablesManager methods instead of O(N*M) as before. Change-Id: If17eeaec197beae8b8aecffca1f19d4535a7226e
# -- Welcome!
You have come across a cloud computing network fabric controller. It has identified itself as "Neutron." It aims to tame your (cloud) networking!
# -- External Resources:
The homepage for Neutron is: http://launchpad.net/neutron . Use this site for asking for help, and filing bugs. Code is available on github at <http://github.com/openstack/neutron>.
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Neutron Administrator Guide http://docs.openstack.org/trunk/openstack-network/admin/content/
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