LinHES-system: add checkXFSfrag.sh and weekly cron job. closes #929

1 files changed, 51 insertions, 0 deletions

diff --git a/abs/core/LinHES-system/checkXFSfrag.sh b/abs/core/LinHES-system/checkXFSfrag.sh
new file mode 100755
index 0000000..99b833c
--- /dev/null
+++ b/abs/core/LinHES-system/checkXFSfrag.sh
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+#!/bin/bash
+#
+# Bash script by Gene Alexander (http://www.eracc.com/contact)
+# of ERA Computers & Consulting (www.eracc.com, blog.eracc.com, shopping.eracc.com)
+# Written using vim, the BEST plain text file editor in all of Creation.
+#
+# Teach yourself bash scripting: http://tldp.org/LDP/abs/html/index.html
+#
+# Purpose: To check fragmentation on XFS with xfs_db and run xfs_fsr on XFS mount points that
+# are above a specific fragmentation threshold.
+#
+# What is xfs_db? Use 'man xfs_db' to find out.
+# What is xfs_fsr? Use 'man xfs_fsr' to find out.
+#
+# Any busy files, such as open logs on /var/log, will be skipped. To defragment logs one should
+# wrap this script with another script to stop and restart logging. Or, even better, write
+# one's own script just for defragmentation of the logs.
+#
+# Warranty: NONE. Use at your own discretion and be aware that data loss is on your head if
+# you choose to use this script.
+#
+# License: GPL 2.0 http://www.gnu.org/licenses/gpl-2.0.html
+#
+# Suggested Usage: crontab file for root
+# 0 0 * * * /root/bin/chkxfsfrag # Run at midnight
+#
+# Original Release: 2011 December 15 (Merry Christmas!)
+# DO NOT ALTER HEADER FROM THIS LINE UP.
+#
+e='/bin/echo -e'                                # Use the echo command, not built-in.
+xfsfsr=/usr/sbin/xfs_fsr                            # Set variable with the path to xfs_fsr.
+xfsdb=/usr/sbin/xfs_db                              # Set variable with the path to xfs_db.
+pctmax=15                                        # Set maxiumum frag percent needed for defrag.
+                                                # This is zero here for testing purposes only
+                                                # a higher number should be used in production.
+array=`df -T|grep xfs|cut -f 1 --delim=" "`     # Array of all XFS file systems.
+for i in ${array[@]};
+do
+        percentage=`$xfsdb -c frag -r ${i}|cut -f 7 --delim=" "`
+        percent2=`$e $percentage|cut -f 1 --delim=.`
+        if [ "$percent2" -gt "$pctmax" ]
+        then
+                $e "${i} is $percentage fragmented. Running defragment on ${i}."
+                # Only uncomment one of the following two lines.
+                #$xfsfsr -v ${i}        # Uncomment for verbose defrag.
+                $xfsfsr ${i}           # Uncomment for quiet defrag.
+        else
+                $e "${i}\t$percent2 is not above fragmentation threshold of $pctmax."
+        fi
+done
+exit 0