nosql database with acid support

the time, I later on the Internet access to more information, found that my understanding is only partial. (Even the author's understanding is wrong, such as the author of 2.1.5 The consistency of the simple understanding of the role of check constraints) in fact, the primary foreign KEY constraints, check constraints are the scope of database integrity (why is the integrity of the acid in the no longer?)

operations with SQL, which can be scaled horizontally.Typical representative of SQL database: SQL Server,oracle,my SQLTypical representative of a NoSQL database: Mongodb,redis1. SQL data exists in a specific structure of the table, NoSQL flexible, storage can be JSON, hash table and other ways2. The table and field st

log-based recovery and transaction support were added in R5 (http://bit.ly/LNotes ). From Day 1 in 1989, Notes have supported replication and disconnected operations with the consequent issues of potentially Conflicting parallel updates has to be dealt with. Even RDBMSs were late in dealing with that kind of functionality. Even if at the individual object level, high concurrency isn ' t important given the nature of a

pros and cons of analysis, I also basically agree. Relationship Advantage:1. Transaction processing---maintaining consistency in data;2. Due to standardization, the cost of updating the data is very small (the same field is basically one place);3. You can perform complex queries such as join. Relational disadvantage:1. Expansion difficulties: Because of the existence of such a join table query mechanism, making the database in the expansion of the

Key-Value Store databaseTemporary: as memcached. The temporary key-value database stores the data in memory, which in two cases results in the loss of data, the first is the power outage, but the data content exceeds the memory size. The benefits of this treatment are very fast.Permanent type: such as Tokyo Tyrant, flare and RomaThe two are both types: Redis. Redis first data in memory, and then meet certain conditions (the default is 15 minutes more

way, NoSQL comes into being.Second, the definition of NoSQLNoSQL (nosql= not-only sql), meaning "not just SQL," is a new revolutionary movement in the database. NoSQL advocates are advocating the use of non-relational data storage. Most database technologies are not guarant

way, NoSQL comes into being.Second, the definition of NoSQLNoSQL (nosql= not-only sql), meaning "not just SQL," is a new revolutionary movement in the database. NoSQL advocates are advocating the use of non-relational data storage. Most database technologies are not guarant

triggers, timed tasks, or other similar DBA techniques to create mirror tables that support full-text indexing (such as the MyISAM type), and the code churn is smaller.MySQL5.6 InnoDB fulltextindexes Research test:http://blog.csdn.net/zyz511919766/article/details/12780173MySQL 5.6.4 supports NoSQL:In the latest mysql-5.6.4-labs-innodb-memcached, a simple nosql function given to Key/value is implemented, th

enable users to use their knowledge across systems and to support third-party attachments and tools.3. SQL can be extended, and is versatile and time validated, which can solve problems from fast write-driven transmission to scanning intensive in-depth analysis.4. SQL is an orthogonal form of data rendering and storage, and some SQL systems support JSON and other structured object formats, with better perf

Transaction is the core of relational database, and relational database has flourished in the past few decades, and its support to the transaction is inseparable. But the so-called Chengye, Shenya, with the explosion of data volume, especially in recent years, the rapid development of large data, relational database tr

In-depth analysis of NoSQL database distributed algorithms (graphic details), nosql text Although the NoSQL movement has not brought about fundamental technological changes to distributed data processing, it still triggers overwhelming research and practices on various protocols and algorithms. In this article, I will

Label:ACID, which is an abbreviation for the four basic elements that the database transaction performs correctly. Contains: atomicity (atomicity), consistency (consistency), isolation (isolation), persistence (durability). A support transaction (Transaction) database, must have these four characteristics, otherwise in the transaction process (Transaction process

://blog.sina.com.cn/s/blog_3fc85e260100msz3.html Each transaction allows the database to be atomically transferred from a consistent permanent state to a new consistent permanent state, which can be said, the acid of the transaction (the transactional properties of atomicity, consistency, isolation and durability) property is the soul of a database transaction:

divides the data and stores it on each local server. Because the performance of reading data from a local disk tends to be better than the performance of reading data over a network, it improves the performance of the system.Elastic Extensibility: You can dynamically add or delete nodes while the system is running. No maintenance is required and data can be migrated automatically.Partitioning: Rather than storing data at the same node, a NoSQL

The diamond is obviously a very valuable thing, because it is expensive, so we will seriously distinguish between genuine and counterfeit. Make sure the Diamonds are really fake a simple and (at least in the movies) popular test is to get it rolling on a piece of glass. Because diamonds are known as the hardest material, real diamonds can easily cut glass surfaces, and fakes, especially those made with glass itself, cannot. For software developers, databases are also so valuable. If you use a

about the various points of view ... Point one: NoSQL will replace SQL This view is like saying that the ship will replace the car, because the ship is a new technology, it is impossible to happen. SQL and NoSQL have the same goal: to store data. They store data in different ways, which can affect the projects you develop, one that will simplify your development and one that will hinder your development. D

Redis database of NoSQL Database: Redis introduction and installation and deployment, nosqlredisZookeeper NoSQL (NoSQL = Not Only SQL) refers to non-relational databases. With the rise of Internet Web websites, traditional relational databases are dealing with Web websites,

Tags: delete repeatable NSIs database system ora complete serialization differentiation errorThis article tells the four characteristics (ACID) of transactions in the database, and will explain the isolation level of the transaction in detail. If a database claims to support

, and application scenarios. Different products have different functions. it is impossible to choose who to choose based on the data model. Which product has the characteristics you need most and which is the best. Assume that your application has the following requirements: Complex things. if you cannot afford the risk of data loss or want a simple transaction programming model, you can choose relational databases and grid databases. Example: an inventory system requires complete

are eager to live in the forefront of technology, but companies must be cautious. 2: Support Enterprises should ensure that if a critical system crashes, they can get timely support. All RDBM providers pay a great power to the high level of enterprise support in dynasties. By contrast, most NoSQL systems are open s