shell split log by data

#!/bin/bash
#文件名：test.sh
name="xiongzaiqiren"
echo $name

echo "BACKUP DATE:" $(date +"%Y-%m-%d %H:%M:%S")

DATE=`date '+%Y%m%d-%H%M%S'`
echo $DATE

LogDATE=`date '+%Y%m%d'`

echo "log test!" >> $LogDATE"_aaa.log"