yahoo-eng-team team mailing list archive

[Matt Riedemann <mriedem.os@xxxxxxxxx>]

** Tags added: evac

** Tags removed: evac
** Tags added: evacuate performance

** Changed in: nova
   Importance: Undecided => Low

** Also affects: nova/queens
   Importance: Undecided
       Status: New

** Also affects: nova/rocky
   Importance: Undecided
       Status: New

** Also affects: nova/stein
   Importance: Undecided
       Status: New

** Changed in: nova/queens
       Status: New => In Progress

** Changed in: nova/rocky
       Status: New => In Progress

** Changed in: nova/stein
       Status: New => In Progress

** Changed in: nova/queens
   Importance: Undecided => Low

** Changed in: nova/rocky
   Importance: Undecided => Low

** Changed in: nova/stein
   Importance: Undecided => Low

** Changed in: nova/queens
     Assignee: (unassigned) => Artom Lifshitz (notartom)

** Changed in: nova/rocky
     Assignee: (unassigned) => Artom Lifshitz (notartom)

** Changed in: nova/stein
     Assignee: (unassigned) => Artom Lifshitz (notartom)

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1837075

Title:
  Evacuation takes too long when destination host has a large number of
  NICs

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) queens series:
  In Progress
Status in OpenStack Compute (nova) rocky series:
  In Progress
Status in OpenStack Compute (nova) stein series:
  In Progress

Bug description:
  Description
  ===========

  Evacuation takes a long time if the destination host a large number of
  network interfaces.

  Steps to reproduce
  ==================

  1. Have a host down, or force it down.

  2. Evacuate instances to a host with a large number of network
  interfaces.

  Expected result
  ===============

  Evacuation completes in a reasonable time frame.

  Actual result
  =============

  Evacuation takes too long.

  Additional info
  ===============

  This was initially reported against OSP10/Newton [1]. In that case,
  based on the included sosreports, the compute host has 1324 network
  interfaces, and 109 instances are being evacuated. That means in
  total, there's 109 * 1324 = 144316 iterations over the loop in
  get_machine_ips().

  [1] https://bugzilla.redhat.com/show_bug.cgi?id=1709400

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