Label:Litedb is a small, fast and lightweight NoSQL embedded database developed by open source. NET, Features:Server-free NoSQL document storage with data stored in a single fileA simple API like MongoDb100% C # code, support for. NET 3.5, single DLL, can be installed from NuGet: Install-package litedbSupports ACID tra
Nosql is a hot topic recently. It can be seen in high-performance and high-concurrency systems. For example, memcached and MongoDB, memcached only supports column-store, And MongoDB does not support transactions. Most importantly, these require server support. In some embedded systems, the hardware environment is overwhelmed by the old bull.
At a friend's suggestion, I tried to use db4o and found that suc
Do a year's freshman year project, for relational database structure or some understand, sometimes still feel that the two-dimensional table is not very comfortable. After reading an article, there is a preliminary understanding of NoSQL (Https://keen.io/blog/53958349217/analytics-for-hackers-how-to-think-about-event-data). This article is written very well, indeed written out in the actual situation 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
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?) I understand that because it only checks the
Tags: relational data table NoSQL database L database Combat div operation Field
Why NoSQL is produced:
The fact that relational databases are not good at doing so is the reason why NoSQL is Born:
Large number of data write operationsThe book is written "la
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
NoSQL databases: data consistency, nosql Database ConsistencyNoSQL Database: Data ConsistencyRead consistency
High ConsistencyAccess any node in the cluster at any time, and the data obtained is consistent;
User consistency is consistent with the data obtained during cluster access for the same user;Solve user consi
-targeted applications, high concurrent Web applications such as online games (Zynga, for example)
6. neo4j
Languages used: JavaFeature: Graph database based on relationLicense to use: GPL, some of which features use agpl/business licenseProtocol: Http/rest (or embedded in Java)can be used independently or embedded in a Java applicationBoth the node and the edg
Label:In the past, we only needed to learn and use a database technology to do almost all of the database application development. Because the mature and stable relational database products are not many, and for you to choose the free version is even less, so the Internet domain basically chose the free MySQL database.
A relational database (RDBMS) has been a mainstream database model for over One-fourth centuries. But now the relational database, "cloud" or "NoSQL" database, is gaining more and more occupancy as an alternative database model. I
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 performance and more functionality than NoSQL.Although N
Introduction and use of the nosql database CodernityDB developed in Python only, nosqlcodernitydb
Look at this logo. It's a bit python-like. The database codernityDB introduced this time is developed in python only.
I used the tinyDB local database and an api service. At first, I thought the speed was a little poor. T
Tags: and EXT structure Publishing NAT process name Data Model operationsThe SQL (Structured Query Language) database is the primary way to store data over the past 40 years. The late 1990s with the rise of Web applications and open-source databases such as MySQL, PostgreSQL, and SQLite, the explosion of user growth. NoSQL databases have been in existence since the 1960s and have gained more attention until
for applications that require low latency data access, high concurrency support, and high availability for example: low latency data access such as ad-targeted applications, high-concurrency Web applications such as online games such as Zynga 6. Neo4j language: Java Features: relational-based graphical database use license: GPL, some of which makeWith agpl/Commercial License Agreement: Http/rest (or embedded
Source: http://database.51cto.com/art/201109/293029.htmAlthough SQL database is a very useful tool, the monopoly is about to be broken after 15 years of a single show. This is only a matter of time: forced to use relational databases, but eventually found to be unable to adapt to the needs of the numerous.But the difference between NoSQL databases is far more tha
Advantages and disadvantages of relational databaseAdvantages:
Can do transaction processing, so as to ensure the consistency of data;
Can be a join, such as multi-table query;
Because of SQL standardization, the cost of data updates is small (the same fields are basically only one place).
Disadvantages:
The write processing of large amount of data is not easy;
If the table data volume is too large, it is not easy to do index or table structure update;
When the field is
NoSQL databases.
1. CouchDB
Language used: ErlangFeatures: DB consistency, easy to useLicense: ApacheProtocol: HTTP/RESTBidirectional data replication,Continuous or temporary handling,Conflict check during processing,Therefore, master-master replication is used (see note 2)MVCC-write operations do not block read OperationsVersions earlier than files can be savedCrash-only (reliable) DesignData Compression from time to timeView:
Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to a deluge of research and practice on protocols and algorithms. In this article, I will make some systematic descriptions of the distributed features of the NoSQL database.
The scalability of the system is the main reason to drive the dev
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,
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