Bug 1741677

Summary: Utilizing upmap for manual data rebalance to selected OSD's
Product: [Red Hat Storage] Red Hat Ceph Storage Reporter: Mike Hackett <mhackett>
Component: RADOSAssignee: Neha Ojha <nojha>
Status: CLOSED ERRATA QA Contact: Manohar Murthy <mmurthy>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: aavraham, assingh, ceph-eng-bugs, ceph-qe-bugs, dzafman, hyelloji, jbrier, jdurgin, kchai, mmurthy, nojha, tchandra, tserlin, vumrao
Target Milestone: rcFlags: hyelloji: needinfo-
Target Release: 4.1   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: ceph-14.2.8-3.el8, ceph-14.2.8-3.el7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-05-19 17:30:44 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1747315    

Description Mike Hackett 2019-08-15 19:36:14 UTC 
Description of problem:
Customers are looking to use the upmap feature as a way to rebalance their clusters and also for cluster expansions to be less painful.
We currently do not test the upmap feature outside of the ceph-mgr balancer and this would be required to support use of upmap for manual migrations of PG's to other OSD's. 

Version-Release number of selected component (if applicable):
RHCS 4

How reproducible:
Request for QE to test utilizing upmap for manual balancing of PG's
Comment 2 Vikhyat Umrao 2019-08-16 15:09:06 UTC 
Here are the presentations from Ceph Day Berlin by CERN and Cephalocon Barcelona by UK Research that addresses uses and improvements using the upmap feature which customers are referring to.

UK Research: https://static.sched.com/hosted_files/cephalocon2019/39/CRUSHing_the_OSD_variance_problem.pdf

CERN: https://www.slideshare.net/Inktank_Ceph/ceph-day-berlin-mastering-ceph-operations-upmap-and-the-mgr-balancer
Comment 25 Neha Ojha 2020-05-13 21:45:02 UTC 
*** Bug 1751131 has been marked as a duplicate of this bug. ***
Comment 27 errata-xmlrpc 2020-05-19 17:30:44 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, 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-2020:2231