introduction to nosql databases

Tags: RedisIntroduction to NoSQL (iv)Redis Common operationsRedis Common Operations-stringset key3 zsset key3 lisi //第二次赋值会覆盖setnx key3 wangwu //返回0，则key3存在setnx key4 zhaoliu //返回1，则key4不存在创建key4setex key4 100 tianqi //给key4设置过期时间为100s，值为tianqi，若key4存在则覆盖Redis Common Operations-listlpush listb a //从左侧加入一个元素lpop listb a //从左侧取出一个元素rpush listb b //从右侧加入一个元素rpop listb //从右侧取出第一个元素linsert lista before a 1 //在(值)a的前面插入(值)1lset lista 3 3 //把下标为3对应的数值改为3l

NoSQL Introduction Before introducing Redis, I would like to first recognize the next NoSQL, that is not just SQL, is a kind of non relational data storage, Key/value key value pair storage. Existing NoSQL DB Products: Redis/mongodb/memcached/hbase/cassandra/tokyo cabinet/voldemort/dynomite/riak/couchdb/hypertable/ FL

Tags: redisIntroduction to NoSQL (v)Redis Security Settingsvim /etc/redis.confbind 127.0.0.1 192.168.221.10 //设置监听ipport 10000 //设置监听端口requirepass 123 //设置密码为123rename-command CONFIG apeng //将config命令修改为apengrename-command CONFIG "" //禁掉config命令Restart Redis Servicekillall redis-serverredis-server /etc/redis.confClient connection to Redis serverredis-cli -p 10000 -a ‘123‘ -h 127.0.0.1Redis Slow Query logvim /etc/redis.confslowlog-log-slower-than 1000

Introduction to NoSQL (vii)MongoDB Introduction Official website www.mongodb.com C + +, based on distributed, belongs to a NoSQL In NoSQL, it's the most like relational database. MongoDB stores data as a document, and data structures are composed of key-

This is a creation in Article, where the information may have evolved or changed. Brief introduction Project Open Source Address: Https://github.com/HouzuoGuo/tiedot The initiator left his Twitter, apparently surnamed Guo, a Chinese-American. In the project introduction, there is a description of the performance, someone used this database to crawl Wikipedia, save 59 million data, a total of 73G. Inst

data structure is simple (k-v), the data is stored in memory, the restart data is lost, and the data must be saved to the hard disk before restarting;MultithreadedBased on C/S architecture, the protocol is simple;Time processing based on libevent;Autonomic memory storage processing (slab allowcation)Data expiration methods: Lazy Expiration and LRU~~ Install memcached Source Packageyum install -y libmemcached libeventyum install -y memcachedStartsystemctl start memcachedConfiguration file监听

Tags: RedisIntroduction to NoSQL (ii)About Redis Redis is similar to memcached and also belongs to K-V data storage Redis official website Redis.io Supports more value types, in addition to string, hash, list (linked list), sets (set), and sorted sets (ordered information) Redis uses two file formats: Full data (RDB) and incremental requests (AOF). The full data format is to write the in-memory data to disk to facilitate the next read o

John doe 25 S003 Wang er Leper 26 NBSP; curriculum Course number credits c001 linux 25 c002 python 25 c003 Choose a timetable School Number Course Number Results S001 C001 90 S002 C001 97 S003 C001

Tags: define infinite table compare ABI score bring body upgradeA: Introduction to the Cache databaseNoSQL (NoSQL = not-only sql), meaning "not just SQL", refers to non-relational databases, With the rise of internet web2.0 website, the traditional relational database in coping with web2.0 website, especially the web2.0 pure dynamic website of ultra-large-scale a

Wang er Leper 26 NBSP; curriculum Course number credits c001 linux 25 c002 python 25 c003 Choose a timetable School Number Course Number Results S001 C001 90 S002 C001 97 S003 C001 94 1.2.2 Non-relational data

Introduction to five most popular embedded databases for mobile development Embedded databases are lightweight and independent databases with no server components and no management required. They have a small code size and limited resource requirements. There are currently several types of embedded

Document directory Q: Is the database the same as the database management system? Q: historical database procedures? Q: What are common data models? Q: What applications does the database have? Q: Can I only query relational databases? TIPS: data storage unit Functions provided by DBMS: Features of the file system: Q: Are the following two links the same? Q: Can attributes customize data types? Q: What are common relational

Tags: History component his UNIX tool content bytes Enterprise biashttp://blog.csdn.net/hzhsan/article/details/9384885 1. PrefaceWhen it comes to databases, you will definitely think of SQL Server, Oracle and other relational databases. In fact, there are many kinds of databases, and there are many kinds of databases i

Data storage is an important part of engineering. The big family of database is a flourishing, the schools of contention, such as memory data storage, non-relational database, relational database, graph database and so on.ACCESSMicrosoft Office Access is a relational database management system that is released by Microsoft. It combines two features of the Microsoftjet Database Engine and the graphical user interface and is one of the system programs for Microsoft Office.Microsoft Office Access i

Document directory 4) Check Integrity Constraint rules-how to execute Integrity Constraint rules in actual operations Introduction to database application development-basic concepts in relational databases are written before: relational databases are currently the most widely used databases. Understanding the basic

Databases are the main part of Linux applications. Major databases on Linux include: Oracle, Sybase, DB2, and Informix; free software database: MySQL Databases are the main part of Linux applications. Major databases on Linux include: Oracle, Sybase, DB2, and Informix; free software database: MySQL

recovery policies need to be developed based on the actual situation. What data does MySQL Backup need to back up? It mainly includes data, configuration files, binary logs, and transaction logs.II. Introduction of backup tools: 2.1 MySQL backup tools: Mysqldump: Logical backup tool, MyISAM (temperature), InnoDB (hot backup)Mysqlhotcopy: physical backup tools and warm backup2.2 file system tools: Cp: Cold backup Lv: logical volume snapshot function,

precision; convenient use of text processing tools for direct processing, strong portability Ability 1.3 difference between backing up all data or backing up only some data: Full backup: Back up all the data to be backed up Incremental Backup: only the data changed after the last full backup or Incremental backup is backed up. Differential backup: only backup of the last full backup depends on the changed data Generally, the backup policy is used in combination: Full + incremental; full + diffe

Label:First, the database simple introduction 1, according to the development time sequence of the database, the following types of database system are mainly appeared: Ø Web-based database Ø Hierarchical Database Ø relational database Ø Object-oriented database In the above 4 database system, the relational database is the most widely used. Object-oriented database is a new kind of database which is spawned by object-oriented language. Some of the cu

First, Introduction ORACLE is a large relational database based on advanced Structured Query Language (SQL), popularly It is to manipulate a large collection of regular data in a language that is convenient for logic management. is currently the most popular guest One of the databases for the user/server (client/server) architecture. Second, characteristics 1, ORACLE7. X has introduced shared SQL and