<para>
<literal>
<replaceable>lfs</replaceable>
- </literal> - This utility provides access to the extended attributes (EAs) of a Lustre
- file (along with other information). For more information about lfs, see <xref
- linkend="dbdoclet.50438206_94597"/>.</para>
+ </literal> - This utility provides access to the layout of
+ of a Lustre file, along with other information relevant to users.
+ For more information about lfs, see <xref
+ linkend="userutilities.lfs"/>.</para>
</listitem>
</itemizedlist>
</section>
<para>The following logging and data collection tools can be used to collect information for debugging Lustre kernel issues:</para>
<itemizedlist>
<listitem>
- <para><emphasis role="bold">
- <literal>kdump</literal>
- </emphasis> . A Linux kernel crash utility useful for debugging a system running Red Hat Enterprise Linux. For more information about <literal>kdump</literal>, see the Red Hat knowledge base article <link xl:href="http://kbase.redhat.com/faq/docs/DOC-6039">How do I configure kexec/kdump on Red Hat Enterprise Linux 5?</link>. To download <literal>kdump</literal>, go to the <link xl:href="http://fedoraproject.org/wiki/SystemConfig/kdump#Download">Fedora Project Download</link> site.</para>
+ <para><emphasis role="bold"><literal>kdump</literal></emphasis>.
+ A Linux kernel crash utility useful for debugging a system running
+ Red Hat Enterprise Linux. For more information about
+ <literal>kdump</literal>, see the Red Hat knowledge base article
+ <link xl:href="https://access.redhat.com/solutions/6038">How to
+ troubleshoot kernel crashes, hangs, or reboots with kdump on
+ Red Hat Enterprise Linux</link>. To download
+ <literal>kdump</literal>, install the RPM package via
+ <literal>yum install kexec-tools</literal>.
+ </para>
</listitem>
<listitem>
- <para><emphasis role="bold">
- <literal>netconsole</literal>
- </emphasis>. Enables kernel-level network logging over UDP. A system requires (SysRq) allows users to collect relevant data through <literal>netconsole</literal>.</para>
+ <para><emphasis role="bold"><literal>netconsole</literal></emphasis>.
+ Enables kernel-level network logging over UDP. A system requires
+ (SysRq) allows users to collect relevant data through
+ <literal>netconsole</literal>.</para>
</listitem>
<listitem>
- <para><emphasis role="bold">
- <literal>netdump</literal>
- </emphasis>. A crash dump utility from Red Hat that allows memory images to be dumped
- over a network to a central server for analysis. The <literal>netdump</literal>
- utility was replaced by <literal>kdump</literal> in Red Hat Enterprise Linux 5. For
- more information about <literal>netdump</literal>, see <link
- xl:href="http://www.redhat.com/support/wpapers/redhat/netdump/">Red Hat, Inc.'s
- Network Console and Crash Dump Facility</link>.</para>
+ <para><emphasis><literal>wireshark</literal> </emphasis>. A network
+ packet inspection tool that allows debugging of information that was
+ sent between the various Lustre nodes. This tool is built on top of
+ <literal>tcpdump</literal> and can read packet dumps generated by
+ it. There are plug-ins available to dissassemble the LNet and
+ Lustre protocols. They are included with
+ <literal>wireshark</literal> since version 2.6.0. See also the
+ <link xl:href="https://www.wireshark.org/">Wireshark Website</link>
+ for more details.</para>
</listitem>
- <listitem>
- <para><emphasis><literal>wireshark</literal> </emphasis> . A network
- packet inspection tool that allows debugging of information that was
- sent between the various Lustre nodes. This tool is built on top of
- <literal>tcpdump</literal> and can read packet dumps generated by
- it. There are plug-ins available to dissassemble the LNet and
- Lustre protocols. They are located within the <link
- xl:href="http://git.whamcloud.com/">Lustre git repository</link>
- under <literal>lustre/contrib/wireshark/</literal>. Installation
- instruction are included in that directory. See also <link
- xl:href="http://www.wireshark.org/">Wireshark Website</link> for
- more details.</para>
- </listitem>
</itemizedlist>
</section>
<section remap="h4">
<para>A virtual machine is often used to create an isolated development and test environment. Some commonly-used virtual machines are:</para>
<itemizedlist>
<listitem>
- <para><emphasis role="bold">VirtualBox Open Source Edition</emphasis> . Provides enterprise-class virtualization capability for all major platforms and is available free at <link xl:href="http://www.sun.com/software/products/virtualbox/get.jsp?intcmp=2945">Get Sun VirtualBox</link>.</para>
+ <para>
+ <emphasis role="bold">VirtualBox Open Source Edition</emphasis>.
+ Provides enterprise-class virtualization capability for all major
+ platforms and is available free at
+ <link xl:href="https://www.virtualbox.org/wiki/Downloads">
+ https://www.virtualbox.org/wiki/Downloads</link>.</para>
</listitem>
<listitem>
- <para><emphasis role="bold">VMware Server</emphasis> . Virtualization platform available as free introductory software at <link xl:href="http://downloads.vmware.com/d/info/datacenter_downloads/vmware_server/2_0">Download VMware Server</link>.</para>
+ <para><emphasis role="bold">VMware Server</emphasis>.
+ Virtualization platform available as free introductory software at
+ <link xl:href="https://my.vmware.com/web/vmware/downloads/">
+ https://my.vmware.com/web/vmware/downloads/</link>.</para>
</listitem>
<listitem>
- <para><emphasis role="bold">Xen</emphasis> . A para-virtualized environment with virtualization capabilities similar to VMware Server and Virtual Box. However, Xen allows the use of modified kernels to provide near-native performance and the ability to emulate shared storage. For more information, go to <link xl:href="http://xen.org/">xen.org</link>.</para>
+ <para><emphasis role="bold">Xen</emphasis>. A para-virtualized
+ environment with virtualization capabilities similar to VMware
+ Server and Virtual Box. However, Xen allows the use of modified
+ kernels to provide near-native performance and the ability to
+ emulate shared storage. For more information, go to
+ <link xl:href="https://xen.org/">https://xen.org/</link>.</para>
</listitem>
</itemizedlist>
<para>A variety of debuggers and analysis tools are available including:</para>
<listitem>
<para><emphasis role="bold">
<literal>kgdb</literal>
- </emphasis> . The Linux Kernel Source Level Debugger kgdb is used in conjunction with the GNU Debugger <literal>gdb</literal> for debugging the Linux kernel. For more information about using <literal>kgdb</literal> with <literal>gdb</literal>, see <link xl:href="http://www.linuxtopia.org/online_books/redhat_linux_debugging_with_gdb/running.html">Chapter 6. Running Programs Under gdb</link> in the <emphasis>Red Hat Linux 4 Debugging with GDB</emphasis> guide.</para>
+ </emphasis> . The Linux Kernel Source Level Debugger kgdb is
+ used in conjunction with the GNU Debugger <literal>gdb</literal>
+ for debugging the Linux kernel. For more information about using
+ <literal>kgdb</literal> with <literal>gdb</literal>, see
+ <link xl:href="https://www.linuxtopia.org/online_books/redhat_linux_debugging_with_gdb/running.html">
+ Chapter 6. Running Programs Under gdb</link> in the
+ <emphasis>Red Hat Linux 4 Debugging with GDB</emphasis> guide.
+ </para>
</listitem>
<listitem>
<para><emphasis role="bold">
</emphasis> . Used to analyze saved crash dump data when a system had panicked or locked up or appears unresponsive. For more information about using crash to analyze a crash dump, see:</para>
<itemizedlist>
<listitem>
- <para> Red Hat Magazine article: <link xl:href="http://magazine.redhat.com/2007/08/15/a-quick-overview-of-linux-kernel-crash-dump-analysis/">A quick overview of Linux kernel crash dump analysis</link></para>
- </listitem>
- <listitem>
- <para><link xl:href="http://people.redhat.com/anderson/crash_whitepaper/#EXAMPLES">Crash Usage: A Case Study</link> from the white paper <emphasis>Red Hat Crash Utility</emphasis> by David Anderson</para>
- </listitem>
- <listitem>
- <para> Kernel Trap forum entry: <link xl:href="http://kerneltrap.org/node/5758">Linux: Kernel Crash Dumps</link></para>
- </listitem>
- <listitem>
- <para> White paper: <link xl:href="http://www.google.com/url?sa=t&source=web&ct=res&cd=8&ved=0CCUQFjAH&url=http%3A%2F%2Fwww.kernel.sg%2Fpapers%2Fcrash-dump-analysis.pdf&rct=j&q=redhat+crash+dump&ei=6aQBS-ifK4T8tAPcjdiHCw&usg=AFQjCNEk03E3GDtAsawG3gfpwc1gGNELAg">A Quick Overview of Linux Kernel Crash Dump Analysis</link></para>
+ <para> Overview on how to use crash by the author:
+ <link xl:href="https://crash-utility.github.io/crash_whitepaper.html">
+ White Paper: Red Hat Crash Utility</link>
+ </para>
</listitem>
</itemizedlist>
</listitem>
</section>
</section>
</chapter>
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