what is the purpase of the command rsync -rvzh - bash

Question

im trying to understand what this two command doing:
config=$(date +%s)
rsync -rvzh $1 /var/lib/tomcat7/webapps/ROOT/DataMining/target > /var/lib/tomcat7/webapps/ROOT/DataMining/$config
this line appears in a bigger script - script.sh looking like this:
#! /bin/bash
config=$(date +%s)
rsync -rvzh $1 /var/lib/tomcat7/webapps/ROOT/DataMining/target > /var/lib/tomcat7/webapps/ROOT/DataMining/$config
countC=0
countS=`wc -l /var/lib/tomcat7/webapps/ROOT/DataMining/$config | sed 's/^\([0-9]*\).*$/\1/'`
let countS--
let countS--
let countS--
while read LINEC #read line
do
if [ "$countC" -gt 0 ]; then
if [ "$countC" -lt "$countS" ]; then
FILENAME="/var/lib/tomcat7/webapps/ROOT/DataMining/target/"$LINEC
count=0
countW=0
while read LINE
do
for word in $LINE;
do
echo "INSERT INTO data_mining.data (word, line, numWordLine, file) VALUES ('$word', '$count', '$countW', '$FILENAME');" >> /var/lib/tomcat7/webapps/ROOT/DataMining/query
mysql -u root -Alaba1515< /var/lib/tomcat7/webapps/ROOT/DataMining/query
echo > /var/lib/tomcat7/webapps/ROOT/DataMining/query
let countW++
done
countW=0
let count++
done < $FILENAME
count=0
rm -f /var/lib/tomcat7/webapps/ROOT/DataMining/query
rm -f /var/lib/tomcat7/webapps/ROOT/DataMining/$config
fi
fi
let countC++
done < /var/lib/tomcat7/webapps/ROOT/DataMining/$config #finish while
i was able to find lots of documentary about rsync and what it is doing but i don't understand whats the rest of the command do. any help please?

Answer 1

The first command assigns the current time (in seconds since epoch) to the shell variable config. For example:
$ config=$(date +%s)
$ echo $config
1446506996
rsync is a file copying utility. The second command thus makes a backup copy of the directory listed in argument 1 (referred to as $1). The backup copy is placed in /var/lib/tomcat7/webapps/ROOT/DataMining/target. A log file of what was copied is saved in var/lib/tomcat7/webapps/ROOT/DataMining/$config:
rsync -rvzh $1 /var/lib/tomcat7/webapps/ROOT/DataMining/target > /var/lib/tomcat7/webapps/ROOT/DataMining/$config
The rsync options mean:
-r tells rsync to copy files diving recursively into subdirectories
-v tells it to be verbose so that it shows what is copied.
-z tells it to compress files during their transfer from one location to the other.
-h tells it to show any numbers in the output in human-readable format.
Note that because $1 is not inside double-quotes, this script will fail if the name of directory $1 contains whitespace.