shell脚本：数据库的分库分表

#!/bin/bash
#########################
#File name:db_fen.sh
#Version:v1.0
#Email:admin@test.com
#Created time:2023-07-29 09:18:52
#Description:
#########################

# MySQL连接信息
db_user="root"
db_password="RedHat@123"
db_cmd="-u${db_user} -p${db_password}"
exclude_db="information_schema|mysql|performance_schema|sys|Database"
bak_dir=/backup/db/mysqldump_test/
# 判断备份路径是否存在
[ -d ${bak_dir} ] || mkdir ${bak_dir}

# 查找出需要备份的数据库
 mysql ${db_cmd} -e"show databases" -N 2>/dev/null | egrep -v "$exclude_db" > dbtmp
# 循环遍历数据库列表
while read db
do
        #对数据库进行备份
    mysqldump ${db_cmd} --set-gtid-purged=off $db 2>/dev/null | gzip > ${bak_dir}/`date +%F`-$db.sql.gz
        #判断是否备份成功
    if [ $? -eq 0 ]
    then
        echo "database $db is being backed up ... success!"
    else
        echo "database $db is being backed up ... failure!"
    fi
        #根据数据库进行分表备份 
    [ -d ${bak_dir}/$db ] || mkdir -p ${bak_dir}/$db
               # 获取数据库中的表名列表
    mysql ${db_cmd}  $db -e "SHOW TABLES;" | grep -v "Tables_in" > tbtmp

    # 循环遍历表名列表
    while read tb
    do
        # 对表进行备份
        mysqldump ${db_cmd} --set-gtid-purged=off $db $tb 2>/dev/null | gzip > ${bak_dir}/$db/`date +%F`-$db-$tb.sql.gz

 # 判断是否备份成功
        if [ "$?" -eq 0 ]; then
            echo "Backup of $db.$tb successful!"
        else
            echo "Backup of $db.$tb failed!"
        fi
    done < tbtmp
done < dbtmp
#删除临时文件
rm -rf tbtmp
rm -rf dbtmp