MYSQL数据库备份脚本

tanghongshan

MYSQL数据库备份脚本
详细的解释以后填写!
这个备份和rsync 的功能一样,备份7天,和一个当前
date +%w
但结果不一样,有兴趣的自己去研究
rsync 出来的结果是
0/       1/       2/       3/       4/       5/       6/       current/
MYSQL出来的结果是

backup.0/  backup.1/ backup.2/ backup.3/  backup.4/ backup.5/
只备份6天,
[email=$USER@$DSTHOST:$DDIR][/email]


#!/bin/sh
# mysql_backup.sh: backup mysql databases and keep newest 5 days backup.
#
# Last updated: 20 March 2006
# ----------------------------------------------------------------------
# This is a free shell script under GNU GPL version 2.0 or above
# Copyright (C) 2006 Sam Tang
# Feedback/comment/suggestions :
http://www.real-blog.com/
# ----------------------------------------------------------------------
# your mysql login information
# db_user is mysql username
# db_passwd is mysql password
# db_host is mysql host
# -----------------------------
db_user="XXXXXXX"
db_passwd="XXXXXX"
db_host="XXXXXXXXX"
# the directory for story your backup file.
backup_dir="/backup"
# date format for backup file (dd-mm-yyyy)
time="$(date +"%d-%m-%Y")"
# mysql, mysqldump and some other bin's path
MYSQL="$(which mysql)"
MYSQLDUMP="$(which mysqldump)"
MKDIR="$(which mkdir)"
RM="$(which rm)"
MV="$(which mv)"
GZIP="$(which gzip)"
# check the directory for store backup is writeable
test ! -w $backup_dir && echo "Error: $backup_dir is un-writeable." && exit 0
# the directory for story the newest backup
test ! -d "$backup_dir/backup.0/" && $MKDIR "$backup_dir/backup.0/"
# get all databases
all_db="$($MYSQL -u $db_user -h $db_host -p$db_passwd -Bse 'show databases')"
for db in $all_db
do
$MYSQLDUMP -u $db_user -h $db_host -p$db_passwd $db | $GZIP -9 > "$backup_dir/backup.0/$time.$db.gz"
done
# delete the oldest backup
test -d "$backup_dir/backup.5/" && $RM -rf "$backup_dir/backup.5"
# rotate backup directory
for int in 4 3 2 1 0
do
if(test -d "$backup_dir"/backup."$int")
then
  next_int=`expr $int + 1`
  $MV "$backup_dir"/backup."$int" "$backup_dir"/backup."$next_int"
fi
done
exit 0;

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u3/105005/showart_2076633.html