MySQL semi-synchronous replication configuration

MySQL semi-synchronous replication configuration
http://blog.csdn.net/lichangzai/article/details/50554057

MySQL index detailed explanation
http://www.cnblogs.com/ggjucheng/archive/2012/11/04/2754128.html

--create index directly
CREATE INDEX IDX_GROUP_NAME ON base_group(GROUP_NAME);
or
CREATE INDEX IDX_GROUP_NAME ON base_group(GROUP_NAME(50));

--Add an index by modifying the table structure
ALTER TABLE base_group ADD INDEX IDX_GROUP_NAME(GROUP_NAME);
or
ALTER TABLE base_group ADD INDEX IDX_GROUP_NAME(GROUP_NAME(50));

-- create table time specified index
CREATE TABLE `base_group` (
    `id` int(11) NOT NULL AUTO_INCREMENT ,
    `group_name` varchar(255) NOT NULL ,
    `content` text NULL ,
    `time` int(10) NULL DEFAULT NULL ,
    PRIMARY KEY (`id`),
    INDEX index_name (group_name(50))
)

-- delete index
DROP INDEX IDX_GROUP_NAME ON base_group;

Reference: https://www.cnblogs.com/luyucheng/p/6289714.html

MySQL database backup and restoration (incremental backup based on binlog)
https://www.cnblogs.com/luoyx/p/5896419.html

MYSQL incremental backup Volume backup (log backup)
https://www.cnblogs.com/AndyBian58/articles/6694013.html

MySQL database full backup, differential backup, incremental backup
http://blog.csdn.net/zmcyu/article/details /75353245

The difference between MySQL full-text index FULLTEXT index and like
https://www.cnblogs.com/guifanbiji/p/6202195.html

MySQL index type
https://www.cnblogs.com/luyucheng/p/6289714.html

in mysql explain the meaning of usage and results
http://blog.csdn.net/u010061060/article/details/52473244
http://blog.csdn.net/jathamj/article/details/53909614