nosql data modeling

to design the HBase primary key in the HBase authoritative guide. There is no methodology like programming design patterns that can be followed at the model architecture level. When comparing different NoSQL databases, various metrics, such as extensibility, performance, and consistency, are often used in addition to features. Since these indicators are often used in the original sense of NoSQL, they are d

Tags: des Lucene style blog http io ar os useOriginal from " NoSQL Data Modeling techniques ", compiled by the cool shell net Chenhao NoSQL Data Modeling Technology ". After reading this article, you may feel a little bit about

This article was reproduced from: http://coolshell.cn/articles/7270.html ================================================ Full-text translation from the wall of the article "NoSQL Data Modeling techniques", translation is not good, please forgive me. After reading this article, you may feel a little bit about NOSQL

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. Red

NoSQL data model (4) Summary of nosql aggregation, NoSQLBackground in the first three articles, we have introduced three databases that belong to the aggregation model in NoSQL: Key-value type, document type, and column family type. The following analyzes the common points and differences of the three aggregate

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

Whether it is an enterprise information system or a Web site, various sizesProgramThe original functions are data operations. It can be seen that a group's various requirements for some data have created one program after another, or software systems. Looking back, we started to deal with data from the very beginning. What should we do first when a new project

industry, so there will be different companies targeting a specific industry model. For different industries, the same company also has different models, depending on the different business characteristics of different industries. For example, the tdwm model of IBM contains the following nine concepts: Figure 1. tdwm conceptual model of IBM Many may ask why your model has nine concepts, not ten, and 11? What is the basis of your data warehouse model

Discussion on data modeling methods in data warehouse construction The main content of this article is not to introduce some data models of the existing popular main industries, but to share some of my experiences in

Https://edu.hellobi.com/course/54High-quality Database modeling 1-significance1. The concept and significance of the data modeldikw--(data) information (information) knowledge (knowledge) wisdom (Wisdom), I understand that information is obtained through data, knowledge is gained through information, and wisdom is gene

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

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 check constraints on the

Nosql> redis learning data type, nosql-redisRedis-> string binary setnx name lijie judge whether the key value exists. If there is a returned value, 0 does not exist. Set it to setex. Specify the key value validity period. setex name 10 lijie setrange: Set the vlaue value of the specified key. sub-string (we prefer to replace the 126 mailbox with the gmail mailbo

business dimension information for integrated integration, this situation is more appropriate for generating surrogate keys to master keys. Summary The construction of the dimension table seems relatively simple, in most cases the business library will be directly, but in addition to the different levels of the dimension of Redundancy (Star model), but also need to grasp the details of the following dimensions of the construction of attention, after all, the dimension of errors will

On the NoSQL data model bitsCN.com This article provides a brief overview of NoSQL Data Modeling Techniques. The original article discusses several Data models of NoSQL in detail. It is

0x00 Preface The following content, is the author in the study and work of some summary, of which the concept of most of the content from the book, the practical content mostly from their own work and personal understanding. Due to the lack of qualifications, there will inevitably be many mistakes, I hope to criticize. Overview The Data warehouse contains a lot of content, which can include architecture, modeling