Wow, amazing, big +1 for such patch. :D On Tue, Feb 27, 2018 at 3:57 PM Daniel Alvarez Sanchez <dalva...@redhat.com> wrote:
> Hi all, > > When working on the performance of the OVN OpenStack integration and > following up this thread [0]. > > I went a bit deeper trying to find out the root cause of the linear > growth. It happens that during the processing of the update2 messages, when > there's a 'modify' operation, the data is converted to JSON [1] and then we > build a Row from this JSON [2]. > > This seems pretty useless and, since the JSON document is not used > anywhere else, I just avoided that conversion. This conversion takes longer > as the number of elements in the row increases, which is the case of adding > a new address to the Address_Set table or adding new ACLs to the acl column > in Logical_Switch. This have a big impact at scale and it can be easily > fixed. > > After removing the extra conversions (I'll be submitting the patch in a > while), the time for creating ports from OpenStack remains almost constant > regardless of the amount of ports in the system as you can see in the > attached image and further in this blogpost [3] and it's cut down > considerably. > > This would make the implementation of the Port_Set discussed at [0] less > urgent. > > [0] > https://mail.openvswitch.org/pipermail/ovs-discuss/2018-February/046149.html > [1] > https://github.com/openvswitch/ovs/blob/f73d562fc0ee3ff43f65cc418f213a79a727cb19/python/ovs/db/idl.py#L604 > [2] > https://github.com/openvswitch/ovs/blob/f73d562fc0ee3ff43f65cc418f213a79a727cb19/python/ovs/db/idl.py#L524 > [3] > http://dani.foroselectronica.es/ovn-profiling-and-optimizing-ports-creation-434/ > _______________________________________________ > discuss mailing list > disc...@openvswitch.org > https://mail.openvswitch.org/mailman/listinfo/ovs-discuss >
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