View source for IRIDIA cluster backup files

This page contains information on how to stop the cluster and on what files to backup before reinstalling everything.

== Stopping the current operation ==
Log on to majoranaas root, do a qstat to see if anyone is using the cluster, if not stop the Sun Grid Engine (SGE):
<pre>
/etc/init.d/rcsge stop
</pre>

Check if there is any mail on the servers (/var/spool/mail)

== Backing up important files ==

If there are any MySQL database running on one of the servers back it up using mysqldump, e.g.:
<pre>
mysqldump --allow-keywords --all-databases -u root -p > mysqldbbackup.txt
</pre> 

Backup the follow directories from majorana:
<pre>
/home                    (Users' home directories)
/etc                     (User passwords, conf files for NIS, NFS, ..) 
/usr/local/sge           (Sun Grid Engine)
/usr/src/ganglia         (Ganglia)
/usr/lib/fai             (Fully automated installation)
/usr/share/fai           (Fully automated installation)
/usr/local/share/fai     (Fully automated installation)
/root                    (Scripts etc.)
</pre>

Backup the following directories from polyphemus:
<pre>
/etc                     (Misc configuration files)
/root/flexlmd            (FlexLM license manager files)
/var/flexlm              (More FlexLM)
/etc/init.d/flexlmd      (More FlexLM)
/etc/rc*/*80flexlmd      (More FlexLM)
/etc/flexlm              (More FlexLM)
/root                    (Scripts etc.)
</pre>

Backup the following directories from one diskless node and one rack node:
<pre>
/etc
</pre>

'''Note:''' Some directories you can simply tar and compress, while that might take a bit too long/too much space for the home directories. In those cases rsync can prove useful.