Document Database Comparison

With the rise of internet web2.0 websites, the relational database has become a very hot new field, the development of the non relational database products is very rapid. 　　But the traditional relational database in dealing with web2.0 website, especially the super large-scale and high concurrent SNS type web2.0 pure dynamic website already appeared to be powerless, has exposed many insurmountable problems, for example: 1, high configured--to the database higher concurrent reads and writes the demand WEB2.0 website to be based on user personalized information to generate real-time dynamic ...

Comparison of 8 kinds of NoSQL database system: Kristóf Kovács Editor: Agile translation: Tang Yuhua share: More: Kristóf Kovács is a software architect and consultant who recently published an article comparing various types of NoSQL databases. The article is compiled by Agile translation-Tang Yuhua. If you want to reprint, please refer to the text after the declaration. Although SQL database is very useful ...

Introduction with the advent of the cloud computing era, various types of Internet applications are emerging, the relevant data model, distributed architecture, data storage and other database related technical indicators also put forward new requirements. Although the traditional relational database has occupied the unshakable position in the data storage, but because of its inherent limitation, has been unable to satisfy the cloud computing age to the data expansion, reads and writes the speed, the support capacity as well as the construction and the operation cost request. The era of cloud computing has put forward a new demand for database technology, which is mainly manifested in the following aspects. Mass data processing: to ...

1. Languages used in COUCHDB: Erlang features: DB consistency, easy to use license: Apache protocol: http/rest bidirectional data replication, continuous or temporary processing, processing with conflict checking, therefore, The use of Master-master replication (see note 2) mvcc– write without blocking read operation Pre-save version crash-only (reliable) design requires data compression view: Embedded mapping/Reduce formatted view: List display support for server ...

Naresh Kumar is a software engineer and enthusiastic blogger, passionate and interested in programming and new things. 　　Recently, Naresh wrote a blog, the open source world's two most common database MySQL and PostgreSQL characteristics of the detailed analysis and comparison. If you're going to choose a free, open source database for your project, you may be hesitant between MySQL and PostgreSQL. MySQL and PostgreSQL are free, open source, powerful, and feature-rich databases ...

In mailbox rapid expansion process, one of the performance problems is the MongoDB database level write lock, the time spent in the lock waiting process, directly reflects the user's use of the service process delay. To address this long-standing problem, we decided to migrate a common set of MongoDB (storing mail-related data) to a separate cluster. According to our inference, this will reduce the lock latency by 50%, and we can add more fragments, and we expect to be able to optimize and manage different types of data independently. We start from Mon ...

Content index 1. A classic element of high quality requirements 1.1 assessment requirements: Target and Priority 1.2 refinement requirements: The use of smart Principles 2. Counter Example: Low quality demand 3. Practice: Make high quality demand by hand 3.1 example: Automatically tell mom, I'm almost home. 4. Summary: From good demand to good product = = ======================= 1. What is the classic element of a high quality requirement? One is that the demand itself is valuable, and the other is that demand is clearly articulated without omission. So...

SAP has recently provided a detailed roadmap for future development of its Hana memory database. Hana has become the core pillar of SAP's product strategy. A long Hana road map that was exposed last week revealed many of the new features that are about to be launched. However, this file does not provide specific release dates for these new features and indicates that the plan can be changed at any time. Based on this roadmap, over time, Hana users can expect to improve integration with the Hadoop framework for large-scale data processing, including tighter modeling and Hadoop architecture ...

SAP has recently provided a detailed roadmap for future development of its Hana memory database. Hana has become the core pillar of SAP's product strategy. A long Hana road map that was exposed last week revealed many of the new features that are about to be launched. However, this file does not provide specific release dates for these new features and indicates that the plan can be changed at any time. Based on this roadmap, over time, Hana users can expect to improve integration with the Hadoop framework for large-scale data processing, including tighter modeling and Hadoop architecture ...

The intermediary transaction SEO diagnoses Taobao guest cloud host technology Hall "Editor's note" This article translator Fan, for mobile web, now is the fast growing age. 　　Thanks to the HTML5 and CSS3 technologies, mobile browsers have a lot of performance, and the mobile app framework has expanded, which means that the viability of creating a rich interactive web experience for mobile devices has increased. This article compares the four common frameworks to see what changes are being brought about by new technologies ...