Linux/Unix shell 脚本清除归档日志文件

最新推荐文章于 2024-02-01 17:42:39 发布

randyl

最新推荐文章于 2024-02-01 17:42:39 发布

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对于DEV以及UAT环境，有些时候，数据库需要处于归档模式，但并不需要备份数据库。因此，archive归档日志不停的增长导致磁盘空间被大量耗用。对于这种情形，可以使用一个shell脚本来定时自动清除这些归档日志。本文给出了清除归档日志的脚本。

1、清除归档日志shell脚本

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robin@SZDB:~/dba_scripts/custom/bin> more remove_arch_dump.sh
#!/bin/bash
# ------------------------------------------------------------+
# FileName: remove_arch_dump.sh |
# Desc: |
# Remove old archived log and data pump file |
# Usage: |
# ./remove_arch_dump.sh |
# |
# Authror : Robinson |
# Blog : http://blog.youkuaiyun.com/robinson_0612 |
# ------------------------------------------------------------+
filename=/etc/oratab
cat $filename | while read LINE
do
case $LINE in
\#*) ;; #comment-line in oratab
*)
ORACLE_SID=`echo $LINE | awk -F: '{print $1}' -`
echo $ORACLE_SID
# ---------------------------------
# define archived log directory
# ---------------------------------
dir=/u02/database/$ORACLE_SID/archive/
echo $dir
filelist=`ls -t $dir`
echo $filelist
# ----------------------------------------------------------
# start to remove archived log and keep last 2 archived log
# ----------------------------------------------------------
count=0
for filename in $filelist
do
echo $filename
count=$(($count+1))
if [ $count -gt 2 ]; then
echo $count
rm -vrf $dir$filename
fi
done
ls -tr $dir
# --------------------------------
# define data pump dump directory
# --------------------------------
dir=/u02/database/$ORACLE_SID/BNR/dump/
echo $dir
filelist=`ls -t $dir`
echo $filelist
# ---------------------------------------------------------
# start to remove data pump file and keep last 5 dump file
# ---------------------------------------------------------
count=0
for filename in $filelist
do
echo $filename
count=$(($count+1))
if [ $count -gt 5 ]; then
echo $count
rm -vrf $dir$filename
fi
done
ls -tr $dir
;;
esac
done
exit

robin@SZDB:~/dba_scripts/custom/bin> more remove_arch_dump.sh
#!/bin/bash
# ------------------------------------------------------------+
#   FileName: remove_arch_dump.sh                             |
#   Desc:                                                     | 
#        Remove old archived log and data pump file           |
#   Usage:                                                    |
#        ./remove_arch_dump.sh                                |
#                                                             |
#   Authror : Robinson                                        |
#   Blog    : http://blog.youkuaiyun.com/robinson_0612              |
# ------------------------------------------------------------+

filename=/etc/oratab

cat $filename | while read LINE
do
    case $LINE in
        \#*)                ;;        #comment-line in oratab
        *)
        ORACLE_SID=`echo $LINE | awk -F: '{print $1}' -`
        echo $ORACLE_SID
  
        # ---------------------------------
        # define archived log directory     
        # ---------------------------------
        dir=/u02/database/$ORACLE_SID/archive/
        echo $dir

        filelist=`ls -t $dir`
        echo $filelist
        
        # ----------------------------------------------------------
        # start to remove archived log and keep last 2 archived log
        # ----------------------------------------------------------
        count=0
        for filename in $filelist
        do
                echo $filename
                count=$(($count+1))
                if [ $count -gt 2 ]; then
                        echo $count
                        rm -vrf $dir$filename
                fi
        done
        ls -tr $dir
        
        # --------------------------------
        # define data pump dump directory
        # --------------------------------
        dir=/u02/database/$ORACLE_SID/BNR/dump/
        echo $dir

        filelist=`ls -t $dir`
        echo $filelist
        
        # ---------------------------------------------------------
        # start to remove data pump file and keep last 5 dump file 
        # ---------------------------------------------------------
        count=0
        for filename in $filelist
        do
                echo $filename
                count=$(($count+1))
                if [ $count -gt 5 ]; then
                        echo $count
                        rm -vrf $dir$filename
                fi
        done
        ls -tr $dir

     ;;
    esac
done
exit

2、脚本说明
    a、该脚本通过一个外部循环来读取oratab中定义的数据库的SID来寻找对应数据库的归档日志路径以及datapump dump路径。
    b、使用了一个for循环来清除归档日志，且保留最后的2个归档日志文件。
    c、接下来的另一个for循环则用来清除当前SID下对应的dump(Oracle datapump)目录下导出的dump文件。
    d、同清除归档日志一样，设定了保留dump目录最近的5个文件。保留多少个最近的文件(dump的5，或者归档日志2)可以修改。
    e、如果不需要清除dump路径，可以将dump部分注释掉。
    f、根据需要将其部署到crontab。

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