oracle expdp 备份脚本

#!/bin/bash
#Oracle 环境变量
NLS_LANG=AMERICAN_AMERICA.AL32UTF8
ORACLE_SID=zgw
ORACLE_BASE=/opt/oracle
ORACLE_HOME=/opt/oracle/11g
PATH=$PATH:$ORACLE_HOME/bin:$HOME/bin
export ORACLE_SID ORACLE_BASE ORACLE_HOME NLS_LANG PATH

#获取时间戳
export BAKUPTIME=`date +%Y%m%d%H%M%S`
#dump文件生成目录
export DATA_DIR=/home/oracle/backup/dump
#压缩文件存放目录
export TAR_DIR=/home/oracle/backup/tars
mkdir -p $DATA_DIRmkdir -p $TAR_DIR
cd $DATA_DIR         
echo "Starting bakup..."
echo "Bakup file path $DATA_DIR/scott_expdp_$BAKUPTIME.dmp"

#使用expdp时需要先指定转储文件和日志文件所在的目录，可以通过如下命令实现
#SQL>CREATE OR REPLACE DIRECTORY scott_backup as ‘/home/oracle/backup/dump‘;
#SQL>grant read,write on directory scott_backup to SCOTT; 
expdp scott/scott directory=scott_backup dumpfile=scott_expdp_$BAKUPTIME.dump logfile=scott_expdp_$BAKUPTIME.log parallel=4
#parallel=4 为并行度，对于备份大数据库有助于减少备份时间，但会增加CPU负载。

echo "Starting tar..."
echo "Tar file path $TAR_DIR/SCOTT_$BAKUPTIME.tar.gz"
tar -zcvf $TAR_DIR/scott_expdp_$BAKUPTIME.tar.gz scott_expdp*
echo "Bakup job is done!"
#历史dump文件保留7天
find  $DATA_DIR -type f -mtime +7 -exec rm -rf {} \;