存储架构

mysql主从复制、延迟复制、半同步

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mysql主从复制、延迟复制、半同步

#xtrabackup备份:

#备份
/data/mysql_backup/percona-xtrabackup-2.4.9-Linux-x86_64/bin/xtrabackup –defaults-file=/etc/my.cnf –backup –target-dir=/data/backup/2020-01-22-14 –user=root –password= -S /var/lib/mysql/mysql.sock

#恢复
/data/mysql_backup/percona-xtrabackup-2.4.9-Linux-x86_64/bin/xtrabackup –prepare –target-dir=${CURRENT_DIR}/${FULL_NAME}
/data/mysql_backup/percona-xtrabackup-2.4.9-Linux-x86_64/bin/xtrabackup –defaults-file=/etc/my.cnf –copy-back –target-dir=${CURRENT_DIR}/${FULL_NAME}

===========================

/data/mysql_backup/percona-xtrabackup-2.4.9-Linux-x86_64/bin/

#mysql主从滞后的怎么办?
1、从节点的硬盘用ssd
2、从节点的网络慢?
3、架构方面的扩展。做写的拆分
4、日志压缩的参数。slave_compressed_protocol,压缩会占用cpu

#innobackupex备份:(推荐
#1、备份:
/data/mysql_backup/percona-xtrabackup-2.4.9-Linux-x86_64/bin/innobackupex –default-file=/etc/my.cnf –user=root -S /var/lib/mysql/mysql.sock /opt/

#2、scp到从库

#3、预处理
/data/mysql_backup/percona-xtrabackup-2.4.9-Linux-x86_64/bin/innobackupex –default-file=/etc/my.cnf –user=root -S /var/lib/mysql/mysql.sock –apply-log –user-memory=1G /opt/2020-01-22_23-03-46

#4、关闭从库

#5、copy数据(恢复)
/data/mysql_backup/percona-xtrabackup-2.4.9-Linux-x86_64/bin/innobackupex –default-file=/etc/my.cnf –user=root -S /var/lib/mysql/mysql.sock –move-back /opt/2020-01-22_23-03-46

#6、查看master位置
[[email protected] 2020-01-22_23-03-46]# cat xtrabackup_binlog_info
mysql-bin.000001 463024536
#7、修改权限
[[email protected] 2020-01-22_23-03-46]# chown -R mysql.mysql /var/lib/mysql/

#8、启动从库

#9、设置主从:
CHANGE MASTER TO
MASTER_HOST=‘192.168.56.11‘,
MASTER_PORT=3306,
MASTER_USER=‘rep‘,
MASTER_PASSWORD=‘123456‘,
MASTER_LOG_FILE=‘mysql-bin.000001‘,
MASTER_LOG_POS=463024536;

start slave;

show slave statusG

#延迟复制:
1、误删除恢复。
2、延迟测试。如果有延迟,我们的业务到底怎么样?
3、历史查询。

stop slave;
CHANGE MASTER TO master_delay = 600;
start slave;

#半同步

master:

MariaDB [(none)]> install plugin rpl_semi_sync_master SONAME ‘semisync_master.so‘; #安装插件。
Query OK, 0 rows affected (0.02 sec)

MariaDB [(none)]> set global rpl_semi_sync_master_enabled = 1;
Query OK, 0 rows affected (0.01 sec)

MariaDB [(none)]> set global rpl_semi_sync_master_timeout = 1000;
Query OK, 0 rows affected (0.00 sec)

slave:
MariaDB [(none)]> install plugin rpl_semi_sync_slave SONAME ‘semisync_slave.so‘;
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> set global rpl_semi_sync_slave_enabled = 1;
Query OK, 0 rows affected (0.00 sec)

mysql主从复制、延迟复制、半同步

原文地址:https://www.cnblogs.com/wangkaiok/p/12229109.html

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