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[Abhishek Kekane <1886374@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Glance has a facility lazy loading for legacy images which will be
called on get/list api calls to add store information in image's
location metadata based on location URL of image. Even if admin decides
to change the store names in glance-api.conf same will also be updated
in location metadata for all images related to that particular store.
Current implementation of legacy image performs this operation on each
get/list call as location metadata is not getting updated in database or
it doesn't handle to perform store name check in glance-api.conf

Proposed fix for improvements:
1. Save updated location metadata information in database permanently
2. Add logic to perform lazy loading only if store information is not present in location metadata or store present in location metadata is not defined in glance's enbaled_backends configuration option.

** Affects: glance
     Importance: High
     Assignee: Abhishek Kekane (abhishek-kekane)
         Status: New

** Affects: glance/train
     Importance: Undecided
     Assignee: Abhishek Kekane (abhishek-kekane)
         Status: New

** Affects: glance/ussuri
     Importance: Undecided
     Assignee: Abhishek Kekane (abhishek-kekane)
         Status: New

** Changed in: glance
     Assignee: (unassigned) => Abhishek Kekane (abhishek-kekane)

** Changed in: glance
   Importance: Undecided => High

** Also affects: glance/train
   Importance: Undecided
       Status: New

** Also affects: glance/victoria
   Importance: High
     Assignee: Abhishek Kekane (abhishek-kekane)
       Status: New

** Also affects: glance/ussuri
   Importance: Undecided
       Status: New

** No longer affects: glance/victoria

** Changed in: glance/ussuri
     Assignee: (unassigned) => Abhishek Kekane (abhishek-kekane)

** Changed in: glance/train
     Assignee: (unassigned) => Abhishek Kekane (abhishek-kekane)

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https://bugs.launchpad.net/bugs/1886374

Title:
  Improve lazy loading mechanism for multiple stores

Status in Glance:
  New
Status in Glance train series:
  New
Status in Glance ussuri series:
  New

Bug description:
  Glance has a facility lazy loading for legacy images which will be
  called on get/list api calls to add store information in image's
  location metadata based on location URL of image. Even if admin
  decides to change the store names in glance-api.conf same will also be
  updated in location metadata for all images related to that particular
  store. Current implementation of legacy image performs this operation
  on each get/list call as location metadata is not getting updated in
  database or it doesn't handle to perform store name check in glance-
  api.conf

  Proposed fix for improvements:
  1. Save updated location metadata information in database permanently
  2. Add logic to perform lazy loading only if store information is not present in location metadata or store present in location metadata is not defined in glance's enbaled_backends configuration option.

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