yahoo-eng-team team mailing list archive

[Mateusz Kowalski <mateusz.kowalski@xxxxxxx>]

Public bug reported:

https://bugs.launchpad.net/horizon/+bug/1442310 indicates Nova API not
allowing to pass list of instance ids in order to receive only data
necessary for Horizon and reduce any overhead

As long as Nova is not patched to allow this, from Horizon side
_get_attached_instance_ids and _get_instances can be parallelized. Also
volume_ids_with_snapshots can be run in parallel with the other ones.

Apart from this, as Nova API calls Glance to map each instance with
corresponding image which is definitely not needed for assignment
between volume and instance, we can forge image.name to be empty for
each instance in Volumes view. This further reduces time required for
the whole view to render.

This has significant impact in the following case
* environment with a lot of instances
* environment with instances boot from image which is not available anymore (as in this case Nova calls Glance for each(!) instance separately)

** Affects: horizon
     Importance: Undecided
         Status: New

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Engineering Team, which is subscribed to OpenStack Dashboard (Horizon).
https://bugs.launchpad.net/bugs/1660025

Title:
  Sequential API requests in volume list as a bottleneck

Status in OpenStack Dashboard (Horizon):
  New

Bug description:
  https://bugs.launchpad.net/horizon/+bug/1442310 indicates Nova API not
  allowing to pass list of instance ids in order to receive only data
  necessary for Horizon and reduce any overhead

  As long as Nova is not patched to allow this, from Horizon side
  _get_attached_instance_ids and _get_instances can be parallelized.
  Also volume_ids_with_snapshots can be run in parallel with the other
  ones.

  Apart from this, as Nova API calls Glance to map each instance with
  corresponding image which is definitely not needed for assignment
  between volume and instance, we can forge image.name to be empty for
  each instance in Volumes view. This further reduces time required for
  the whole view to render.

  This has significant impact in the following case
  * environment with a lot of instances
  * environment with instances boot from image which is not available anymore (as in this case Nova calls Glance for each(!) instance separately)

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