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[Bug 1254733] Re: run_instance message in ~17K in size due to duplicated information

 

This is an automated cleanup. This bug report has been closed because it
is older than 18 months and there is no open code change to fix this.
After this time it is unlikely that the circumstances which lead to
the observed issue can be reproduced.

If you can reproduce the bug, please:
* reopen the bug report (set to status "New")
* AND add the detailed steps to reproduce the issue (if applicable)
* AND leave a comment "CONFIRMED FOR: <RELEASE_NAME>"
  Only still supported release names are valid (LIBERTY, MITAKA, OCATA, NEWTON).
  Valid example: CONFIRMED FOR: LIBERTY


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

** Changed in: nova
       Status: Confirmed => Expired

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https://bugs.launchpad.net/bugs/1254733

Title:
  run_instance message in ~17K in size due to duplicated  information

Status in OpenStack Compute (nova):
  Expired

Bug description:
  The RPC call for run_instance includes in its parameters instance,
  filter_properties, and request_spec.  However filter_properties itself
  includes request_spec, and request_spec included a copy of the
  instance record as 'instance_properties'

  Therefore each run_instance massage in effect includes 3 copies of the
  instance data and 2 copies of the request_spec

  Total size for a single request in DevStack is ~15k, of which at least
  60% is replicated data.

  Whilst a very small amount of data is examined in the compute manager
  from filter_properties and request_spec:

  filter-properties:   'limits'   & 'retry'
  request-spec:  -security_group' 

  the main reason for having these structures seems to be so that they
  can be passed back to the scheduler when a retry is required.

  It feels that some simple work in here should be able to reduce the
  message size significantly.

  A formatted print of a typical message captured in DevStack is
  attached.

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