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Bug 1934209 - pulp3: Make migration no-op if there are no changes in plan and everything is migrated
Summary: pulp3: Make migration no-op if there are no changes in plan and everything is...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Satellite
Classification: Red Hat
Component: Pulp
Version: 6.9.0
Hardware: Unspecified
OS: Unspecified
unspecified
medium
Target Milestone: 6.9.0
Assignee: satellite6-bugs
QA Contact: Lai
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-03-02 17:19 UTC by Tanya Tereshchenko
Modified: 2021-04-21 13:11 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-04-21 13:11:17 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Pulp Redmine 8314 0 Normal CLOSED - CURRENTRELEASE Make migration no-op if there are no changes in plan and everything is migrated 2021-03-09 23:06:49 UTC
Red Hat Product Errata RHSA-2021:1313 0 None None None 2021-04-21 13:11:33 UTC

Description Tanya Tereshchenko 2021-03-02 17:19:48 UTC 
Motivation
----------

With improvements introduced earlier, the migration re-runs are much faster now, at the same time when no changes are made and everything is migrated, it still can take time to re-run a migration which is supposed to be no-op. It is mostly noticeable on the large systems with many repositories in Pulp 2 (e.g. dogfood, ~39K pulp2 repos).


Suggested solution
------------------

 - compare if the previous and current plans are exactly the same
 - allow pre-migration to run to check for any changes in Pulp 2 (not sure if there any shortcuts available there)
 - if the plan is the same and everything has been migrated, finish the task and do not proceed with content migration or repo version creation.
Comment 2 pulp-infra@redhat.com 2021-03-02 18:06:03 UTC 
The Pulp upstream bug status is at NEW. Updating the external tracker on this bug.
Comment 3 pulp-infra@redhat.com 2021-03-02 18:06:05 UTC 
The Pulp upstream bug priority is at Normal. Updating the external tracker on this bug.
Comment 4 pulp-infra@redhat.com 2021-03-06 00:15:19 UTC 
The Pulp upstream bug status is at ASSIGNED. Updating the external tracker on this bug.
Comment 5 pulp-infra@redhat.com 2021-03-09 22:07:34 UTC 
The Pulp upstream bug status is at MODIFIED. Updating the external tracker on this bug.
Comment 6 pulp-infra@redhat.com 2021-03-09 23:06:49 UTC 
The Pulp upstream bug status is at CLOSED - CURRENTRELEASE. Updating the external tracker on this bug.
Comment 7 pulp-infra@redhat.com 2021-03-09 23:06:51 UTC 
All upstream Pulp bugs are at MODIFIED+. Moving this bug to POST.
Comment 9 Lai 2021-03-29 18:27:23 UTC 
Steps to retest

1. on a large db with content, run migration command
2. Once finished, run migration command again.
3. Add another yum repo and sync
4. Run migration command.
5. Compare migration command run from 2 and 4

Expected result.
2. Migration should finish faster.
5. Migration should finish faster, but not as fast as 2

Actual result
2. Migration finished faster
5. Migration finished faster, but had a few minutes to a few seconds later than 2.


I tested steps 1-2 and got a result of 2 hours for the first run, then 2 minutes for the 2nd run on a customer db.  This proves that migration is a lot faster.

Verified on 6.9.0_19.1 with python3-pulp-2to3-migration-0.10.0-1.el7pc.noarch
Comment 12 errata-xmlrpc 2021-04-21 13:11:17 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: Satellite 6.9 Release), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2021:1313
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