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[Oleg Bondarev <obondarev@xxxxxxxxxxxx>]

Public bug reported:

The issue was noticed during scale testing of DVR.
When l3 agent starts up it initiates a full sync with neutron server: requests full info about all the routers scheduled to it. At the same time agent may receive different notifications (router_added/updated/deleted) which were sent while agent was offline or starting up. For each of such notifications the agent will request router info again, so server will have to process it twice (first is for resync request). 

The following optimization makes sense: when agent is about to fullsync
we can skip all router notifications since fyllsync should bring the
agent up to date anyway.

** Affects: neutron
     Importance: Undecided
     Assignee: Oleg Bondarev (obondarev)
         Status: In Progress


** Tags: l3-ipam-dhcp loadimpact

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https://bugs.launchpad.net/bugs/1509295

Title:
  L3: agent may do double work upon start/resync

Status in neutron:
  In Progress

Bug description:
  The issue was noticed during scale testing of DVR.
  When l3 agent starts up it initiates a full sync with neutron server: requests full info about all the routers scheduled to it. At the same time agent may receive different notifications (router_added/updated/deleted) which were sent while agent was offline or starting up. For each of such notifications the agent will request router info again, so server will have to process it twice (first is for resync request). 

  The following optimization makes sense: when agent is about to
  fullsync we can skip all router notifications since fyllsync should
  bring the agent up to date anyway.

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