Bug 2138793

Summary:	make cephfs-top display scroll-able like top(1) and fix the blank screen for great number of clients
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Jos Collin <jcollin>
Component:	CephFS	Assignee:	Jos Collin <jcollin>
Status:	CLOSED ERRATA	QA Contact:	julpark
Severity:	medium	Docs Contact:	Akash Raj <akraj>
Priority:	medium
Version:	6.0	CC:	akraj, ceph-eng-bugs, cephqe-warriors, gfarnum, hyelloji, lithomas, neesingh, sostapov, vereddy, vshankar
Target Milestone:	---	Keywords:	Rebase
Target Release:	6.1
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:	.cephfs-top limitation is increased for more client loading Previously, due to a limitation in the `cephfs-top` utility, only less than 100 clients were loaded at a time, which could not be scrolled and also hung if more clients were loaded. With this release, `cephfs-top` users can scroll vertically, as well as, horizontally. This enables `cephfs-top` to load nearly 10,000 clients. The users can scroll the loaded clients, and view them on the screen.	Story Points:	---
Clone Of:	2073273	Environment:
Last Closed:	2023-06-15 09:15:43 UTC	Type:	---
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:	2073273
Bug Blocks:	2067168, 2192813

Description Jos Collin 2022-10-31 09:43:47 UTC

+++ This bug was initially created as a clone of Bug #2073273 +++

Description of problem:

Based on the discussions in the BZ [1],

1. Make cephfs-top display scroll-able like top does. Enable Up/Down, PgUp/PgDn, Right/Left keys to display line-entries which are off the window. Zoom-in the cephfs-top display with 100+ clients (fill up the screen) to simulate this issue. At present, cephfs-top displays only the clients listed at the top (top-left) and there's no way to move down or sideways.

2. There is a related issue of cephfs-top shows blank screen when the number of clients exceeds 150 to 200 clients. Check and fix that too.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2067168

Version-Release number of selected component (if applicable):
RHCS 5.0z4

How reproducible:
Mount more number of clients (100 clients) than the screen could accommodate and run cephfs-top.

Steps to Reproduce:
Same as above.

Actual results:
Can't scroll and see the clients which are off the window and great number of clients shows blank screen.

Expected results:
cephfs-top display should be scroll-able for great number of clients like top(1) does.
cephfs-top should display the clients (no blank screen) for great number of clients.

Additional info:

Comment 20 errata-xmlrpc 2023-06-15 09:15:43 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: Red Hat Ceph Storage 6.1 security and bug fix update), 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-2023:3623