postgreSQL备份脚本删除3天前备份同时压缩昨天备份

ewr23

脚本功能：
系统环境：SUSE Linux Server 11.3 X64
1.删除3天前压缩文件(.bak.tar.gz)
2.备份数据库（未压缩文件.bak）
3.压缩昨天数据库备份文件(.bak.tar.gz),删除昨天数据库备份未压缩文件(.bak)

#!/bin/bash
export PATH=$PATH:/usr/local/pgsql/bin
DATE=`date +%Y_%m_%d_%H`
YESDAY=`date -d "yesterday" +%Y_%m_%d_%H`
TWODAGO=`date -d "3 day ago" +%Y_%m_%d_%H`
PGHOME="/home/postgres"
cd $PGHOME

echo "Dir list before delete 3 day ago backup file: "
ls -lrt

#### delete 3 day ago backup file ####
TDAFILE="testdb_"$TWODAGO".bak.tar.gz"
echo "Detele 3 Day ago file: "$TDAFILE
rm "$TDAFILE"
echo "Dir list after delete 3 day ago backup file: "
ls -lrt

#### Backup ape database ####

echo $DATE
echo "Starting backup database: ape ...."
su - postgres -c "pg_dump testdb > /home/postgres/testdb_$DATE.bak"
reval=#?
if reval=0
then
echo "Database testdb backup Successful!"
else
echo "Database testdb backup Failed!"
fi

echo "Dir list After backup database testdb: "
ls -lrt

#### Compress and remove yesterday bak file####
COMFILE="testdb_"$YESDAY".bak.tar.gz"
YDFILE="testdb_"$YESDAY".bak"
echo "tar zcvf $COMFILE $YDFILE"|sh
echo "General yesterday tar file: "$COMFILE
rm "$YDFILE"
echo "delete yesterday file: "$YDFILE
echo "Dir list After tar yesterday backup file: "
ls -lrt

find /home/postgres -mtime +3 -name "*.bak" -exec rm -rf {} \;
find /home/postgres -mtime +3 -name "*.bak.tar.gz" -exec rm -rf {} \;