Bug 721382

1. Feature Overview:
Feature Id: [73124]
a. Name of Feature: [6.2 FEAT] Enable Core collector as makedumpfile by default for kdump when scp method is configured.
b. Feature Description
Enable Core collector as makedumpfile by default for kdump when scp method is configured.

Kdump tools provided by distro enables user to configure it to save kernel dump in different ways e.g. save to local disk, save to remote disk over NFS, SSH using SCP. By default the distro kdump tool saves the kernel dump in filtered/compressed format using makdumpfile as core collector to improve the disk space usage. It works well for all the methods except for SSH using SCP where makedumpfile as core collector is not enabled by default. In order to improve the disk space usage on the remote disk this feature will enable makedumpfile as a default core collector for SSH (via SCP) save method. Since the makedumpfile reduces the size of the kernel dump by compression/filtering mechanism, it will also reduce the time required to copy kernel dump over the network and will result in reduced network traffic.

This feature request is a result of BUG 66498 (https://bugzilla.linux.ibm.com/show_bug.cgi?id=66498) - Red Hat Bugzilla 693025  raised by test team on RHEL6.1. As per this BUG the feature fix is already available with Redhat and has been tested by IBM.

2. Feature Details:
Sponsor: LTC RAS
Architectures:  ppc64, x86, x86_64, 

Arch Specificity: purely common code
Affects Kernel Modules: No
Delivery Mechanism: LDP Deliverable
Category: other
Request Type: Other
d. Upstream Acceptance: Not evaluated
Sponsor Priority P3
f. Severity: normal
IBM Confidential: No
Code Contribution: ---
g. Component Version Target: ---

3. Business Case
The customers who are using system with huge system RAM would want to their system to get back in running condition as quickly as possible in the event of crash after saving the kernel dump to remote location. This feature will reduce the time taken to save the kernel dump on remote location helping customer to get their systems back online with reduced downtime and improved disk space usage.

4. Primary contact at Red Hat:
John Jarvis, jjarvis

5. Primary contacts at Partner:
Project Management Contact:
Michael W. Wortman, wortman.com

Technical contact(s):
MAHESH J. SALGAONKAR, mahesh.salgaonkar.com

=Comment: #0=================================================

Kdump tools provided by distro enables user to configure it to save kernel dump
in different ways e.g. save to local disk, save to remote disk over NFS, SSH
using SCP. By default the distro kdump tool saves the kernel dump in
filtered/compressed format using makdumpfile as core collector to improve the
disk space usage. It works well for all the methods except for SSH using SCP
where makedumpfile as core collector is not enabled by default. In order to
improve the disk space usage on the remote disk this feature will enable
makedumpfile as a default core collector for SSH (via SCP) save method. Since
the makedumpfile reduces the size of the kernel dump by compression/filtering
mechanism, it will also reduce the time required to copy kernel dump over the
network and will result in reduced network traffic.

This feature request is a result of BUG 66498 (RH bug 693025)
(https://bugzilla.linux.ibm.com/show_bug.cgi?id=66498) raised by test team on
RHEL6.1. As per this BUG the feature fix is already available with Redhat and
has been tested by IBM.

=Comment: #1=================================================
   MAHESH J. SALGAONKAR <mahesh&#64;linux.vnet.ibm.com> - 

   The affected package name is kexec-tools.