Bug 2019920

Summary:	[rbd-mirror] mirror image status - seconds_until_synced remains zero throughout the sync (50G - 20+ min)
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Vasishta <vashastr>
Component:	RBD-Mirror	Assignee:	Ilya Dryomov <idryomov>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	5.1	CC:	ceph-eng-bugs, idryomov, vereddy
Target Milestone:	---
Target Release:	7.0
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OS:	Unspecified
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Description Vasishta 2021-11-03 16:02:46 UTC

Description of problem:
seconds_until_synced in description line remained 0 in mirror image status throughout the sync of 50G+ image in snapshot based mirroring which took 20+ minutes

Version-Release number of selected component (if applicable):
16.2.6-15.el8cp

How reproducible:
Tried once, Will try further

Steps to Reproduce:
1. create an image and fill 50+g data
2. configure rbd mirroring with another cluster
3. enable snapshot based mirroring on the image
4. Observe the mirror image status

Actual results:
seconds_until_synced in description line remained 0 in mirror image status 

Expected results:
seconds_until_synced should get updated accordingly

Additional info: