Mysql数据库表定期备份的实现详解

[root@mysql_bak]# cat mysql_bak.sh

#!/bin/sh

#DATABASE INFO

DB_NAME="ppdb"

DB_USER="root"

DB_PASS="password"

DISPOSE_TABLE="dispose_ticles"

RST_TABLE="match_rst"

DB_IP=100.55.1.129

BIN_DIR="/usr/bin"

BAK_DIR="/home/mysql_bak/data"

DATE=`date+%Y%m%d_%H%M%S`

#mkdir -p $BAK_DIR

#备份包 形成压缩包

$BIN_DIR/mysqldump$DB_NAME $DISPOSE_TABLE > $BAK_DIR/$DISPOSE_TABLE.dump_$DATE.sql

$BIN_DIR/mysqldump$DB_NAME $DISPOSE_TABLE |gzip> $BAK_DIR/$DISPOSE_TABLE.dump_$DATE.sql.gz

$BIN_DIR/mysqldump$DB_NAME $RST_TABLE > $BAK_DIR/$RST_TABLE.dump_$DATE.sql

$BIN_DIR/mysqldump$DB_NAME $RST_TABLE |gzip> $BAK_DIR/$RST_TABLE.dump_$DATE.sql.gz

#定期删除60天的备份包

find$BAK_DIR -name"name_*.sql.gz"-typef -mtime +60 -execrm{} \; >/dev/null2>&1

#30天前的指定库表数据删除操作 (当前时间减去30天）

delete_date=`date--date=ཚ day ago'+%Y-%m-%d`

echo"delete_date=$delete_date"

#删除rst表信息

rst_sql="delete from $RST_TABLE where update_time <= $delete_date order by update_time;";

echo"rst_sql=$rst_sql"

#ret=$(mysql -u $DB_USER -h ${DB_IP} -p${DB_PASS} $DB_NAME -e "$sql");

ret=$(mysql -h${DB_IP} $DB_NAME -e"$rst_sql");

echo$ret

#删除dispose表信息

dispose_sql="delete from $DISPOSE_TABLE where judge_time <= $delete_date order by judge_time;";

echo"dispose_sql=$dispose_sql"

ret=$(mysql -h${DB_IP} $DB_NAME -e"$dispose_sql");

echo$ret

[root@mysql_bak]# cat /etc/crontab

SHELL=/bin/bash

PATH=/sbin:/bin:/usr/sbin:/usr/bin

MAILTO=root

HOME=/

# For details see man 4 crontabs

# Example of job definition:

# .---------------- minute (0 - 59)

# | .------------- hour (0 - 23)

# | | .---------- day of month (1 - 31)

# | | | .------- month (1 - 12) OR jan,feb,mar,apr ...

# | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat

# | | | | |

# * * * * * user-name command to be executed

0 1 */30* */home/mysql_bak/mysql_bak.sh >/dev/null2>&1

[root@mysql_bak]# crontab -e

0 1 */30* */home/mysql_bak/mysql_bak.sh >/dev/null2>&1