SSDB是一个高性能的支持丰富数据结构的NoSQL数据库,用于替代Redis或者与Redis配合存储十亿级别列表的数据,现在已被许多知名企业所应用。我们使用SSDB是想将现有
SSDB是一个高性能的支持丰富数据结构的 NoSQL 数据库, 用于替代 Redis或者与 Redis 配合存储十亿级别列表的数据,现在已被许多知名企业所应用。我们使用SSDB是想将现有的redis中的key迁移到SSDB以破除现有的redis 120G存储极限(当然可以扩展,但是计算了下成本就打算放弃了)。
Twemproxy是twtter开源的一个redis和memcache代理服务器,这里我们使用Twemproxy代理来代理SSDB集群来实现数据的分布式存储,即shared。
1、节点规划:
Twemproxy 192.168.0.100
ssdb1 master 192.168.0.101
ssdb1 slave 192.168.0.102
ssdb2 master 192.168.0.103
ssdb2 slave 192.168.0.104
2、安装SSDB
## 解压下载好的ssdb软件包 $ unzip ssdb-master.zip ## 安装gcc、gcc-c++ 、make等工具 ##编译、安装ssdb,会安装在/usr/local/ssdb/下面 $ cd ssdb-master $ make &&make install ## 进入安装目录 $ cd/usr/local/ssdb/ ## 启动ssdb-server $ ./ssdb-server -dssdb.conf ssdb 1.8.2 Copyright (c)2012-2014 ssdb.io ## 验证是否启动成功,若8888端口被监听,则表示成功 $ netstat-alnut|grep 8888 tcp 0 0 127.0.0.1:8888 0.0.0.0:* LISTEN ## 客户端连接 $ ./ssdb-cli -p8888 ssdb (cli) - ssdb command line tool. Copyright (c)2012-2014 ssdb.io 'h' or 'help' forhelp, 'q' to quit. server version:1.8.2 ssdb 127.0.0.1:8888>3、主从配置,以ssdb1为例
## 修改ssdb1 master的配置文件,如下 # ssdb-server config # MUST indent by TAB! # relative to path of this file, directorymust exists work_dir = ./var pidfile = ./var/ssdb.pid server: ip:192.168.0.101 port:8888 # bind to public ip #ip: 0.0.0.0 # format: allow|deny: all|ip_prefix # multiple allows or denys is supported #deny: all #allow: 127.0.0.1 #allow: 192.168 # auth password must be at least 32 characters #auth: very-strong-password replication: binlog: yes # Limit sync speed to *MB/s, -1: no limit sync_speed: -1 slaveof: # to identify a master even ifit moved(ip, port changed) # if set to empty or notdefined, ip:port will be used. #id: svc_2 # sync|mirror, default is sync #type: sync #ip: 127.0.0.1 #port: 8889 logger: level: debug output: log.txt rotate: size: 1000000000 leveldb: # in MB cache_size: 500 # in KB block_size: 32 # in MB write_buffer_size: 64 # in MB compaction_speed: 1000 # yes|no compression: yes ## 修改ssdb1 slave的配置文件,如下 # ssdb-server config # MUST indent by TAB! # relative to path of this file, directorymust exists work_dir = ./var pidfile = ./var/ssdb.pid server: ip: 192.168.0.102 port: 8888 # bind to public ip #ip: 0.0.0.0 # format: allow|deny: all|ip_prefix # multiple allows or denys is supported #deny: all #allow: 127.0.0.1 #allow: 192.168 # auth password must be at least 32 characters #auth: very-strong-password replication: binlog:yes # Limit sync speed to *MB/s, -1: no limit sync_speed: -1 slaveof: # to identify a master even if itmoved(ip, port changed) # if set to empty or notdefined, ip:port will be used. id: svc_1 # sync|mirror, default is sync type:sync ip: 192.168.0.101 port:8888 logger: level: debug output: log.txt rotate: size: 1000000000 leveldb: # in MB cache_size: 500 # in KB block_size: 32 # in MB write_buffer_size: 64 # in MB compaction_speed: 1000 # yes|no compression: yes

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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