innodb_memcache在安装之前,需要导入配置sql,配置sql位于安装目录的share目录下,文件名为innodb_memcached_config.sql,导入至
innodb_memcache在安装之前,需要导入配置sql,配置sql位于安装目录的share目录下,文件名为innodb_memcached_config.sql,导入至数据库即可。
导入完之后,我们发现多了一个数据库innodb_memcache,该库下有三个表:
cache_policies:缓存策略表
config_options:配置选项表
containers:memcache元数据容器表
1. cache_policies定义了缓存策略 三种刷新策略: innodb_only:只用InnoDB存储数据 cache-only:只用传统的Memcached引擎作存储。 caching:如果在Memcached里找不到,就查询InnoDB。 2. config_options定义了配置信息 separator 多字段组合的间隔符号,默认为| table_map_delimiter 表和键之间的间隔符,默认为. 若修改,则需要重启mysql或者是重新安装memcache插件 3. containers 定义了所有memcache中表和key的元数据信息 name:定义的名字 db_schema:表所在的数据库 db_table:需要映射的表名 key_columns:key所对应的字段名 value_columns:value所对应的字段名,可以用|来进行拼接 flags:memcache的标记 cas_column:字符串长度字段 expire_time_column:过期时间 unique_idx_name_on_key:数据库中的唯一字段索引名字 4. 其他服务器控制参数 mysql> show variables like '%memcache%'; +----------------------------------+------------------+ | Variable_name | Value | +----------------------------------+------------------+ | daemon_memcached_enable_binlog | OFF | | daemon_memcached_engine_lib_name | innodb_engine.so | | daemon_memcached_engine_lib_path | | | daemon_memcached_option | -p | | daemon_memcached_r_batch_size | 1 | | daemon_memcached_w_batch_size | 1 | +----------------------------------+------------------+ 6 rows in set (0.00 sec) 对应的参数含义如下: daemon_memcached_enable_binlog:表示memcache中set是否写入binlog daemon_memcached_option :innodb_memcache默认选项,,可以通过"-p 11222"指定端口 daemon_memcached_r_batch_size、daemon_memcached_w_batch_size:关系到memcache的写入和读取性能, 默认为1,即表示每次都从innodb文件读取和写入!可酌情更改 5. 一个例子 建表: use test; CREATE TABLE `users` ( `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT, `username` VARCHAR(15) NOT NULL, `password` VARCHAR(32) NOT NULL, `email` VARCHAR(50) NOT NULL, `flags` INT(10) UNSIGNED DEFAULT '0', `cas_column` BIGINT(20) UNSIGNED DEFAULT '0', `expire_time_column` INT(10) UNSIGNED DEFAULT '0', PRIMARY KEY (`id`), UNIQUE KEY `username` (`username`) ) ENGINE=INNODB; 写入数据: INSERT INTO `users` (`username`, `password`, `email`) VALUES ('test1', 'test1', 'test2@linuxidc.com'), ('test2', 'test2', 'test2@linuxidc.com'); 写入memcache元数据表: INSERT INTO innodb_memcache.containers ( NAME, db_schema, db_table, key_columns, value_columns, flags, cas_column, expire_time_column, unique_idx_name_on_key ) VALUES ( 'default', 'test', 'users', 'username', 'password|email', 'flags', 'cas_column', 'expire_time_column', 'username' ); get数据: [root@www share]# echo 'get @@default.test1'|nc localhost 11222 VALUE @@default.test1 0 19 test1|test2@linuxidc.com END [root@www share]# echo 'get @@default.test2'|nc localhost 11222 VALUE @@default.test2 0 19 test2|test2@linuxidc.com ENDinnodb_memcache之使用
innodb_memcache之安装
innodb_memcache之配置
MySQL Server 层和 InnoDB 引擎层 体系结构图
本文永久更新链接地址:

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.


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