Database Transaction Isolation Level

The scalability of the system is the main reason for promoting the development of NoSQL movement, including distributed system coordination, failover, resource management and many other features. That makes NoSQL sound like a big basket that can be stuffed with anything. Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to extensive research and practice on protocols and algorithms. It is through these attempts to gradually summarize some effective database construction methods. In this article, I will focus on the NoSQL database distributed special ...

The scalability of the system is the main reason for promoting the development of NoSQL movement, including distributed system coordination, failover, resource management and many other features. That makes NoSQL sound like a big basket that can be stuffed with anything. Although the NoSQL movement does not bring fundamental technological changes to distributed data processing, it still leads to extensive research and practice on protocols and algorithms. It is through these attempts to gradually summarize some effective database construction methods. In this article, I will focus on the distributed features of the NoSQL database ...

April 24, we released a preview version of the SQL Database base level (preview) and standard (preview) new service levels and new business continuity features. In this blog post, we delve into the performance of new levels in SQL Database. Begin with the need for change. We focus on performance (specifically predictable performance) in new service levels, driven primarily by strong customer feedback on SQL Database Web-Level and enterprise-class performance. Web-and enterprise-level performance ...

This article is an attempt to explain how IBM Mobile database works and to combine examples to show how to use IBM Mobile databases to synchronize the data of an Android device with a back-end enterprise. IBM http://www.aliyun.com/zixun/aggregation/29908.html ">SOLIDDB is a memory relational database that runs as efficiently as 10 of the disk database ...

NoSQL systems generally advertise a feature that is good performance and then why? relational database has developed for so many years, various optimization work has been done very deep, nosql system is generally absorbing relational database technology, and then, in the end what is the constraints on the performance of relational database? We look at this problem from the perspective of http://www.aliyun.com/zixun/aggregation/9344.html "> System design." 1, index support. Relational data ...

According to the CBRC statistics, in 2011, China's rural commercial banks, rural credit cooperatives, villages and towns bank more than 2000, but for a long time, these small and medium-sized banks have been with the internet has maintained a cautious boundary relationship. 2012 China's network retail market transaction scale reached 1.3 trillion, the rapid development of e-commerce touched the traditional small and medium-sized banking business transformation of the nerves, but the traditional it architecture characteristics can not support the financial business after the internet, "phenomenon-class" technical support challenges, So the financial institution's IT technology structure transformation becomes its can embrace the Internet, the business transformation rises ...

Although the "editor's note" has been available for 9 years, the popularity of Mongodb,hamsterdb is still lacking, and it has been rated as a Non-mainstream database. Hamsterdb is an open source key value type database. However, unlike other Nosql,hamsterdb, which are single-threaded and not distributed, they are designed to be more like a column store database, while also supporting acid transactions at the Read-committed isolation level. Then compare Leveldb,hamsterdb will have any advantage, here we go ...

Recently released Hive 0.13 ACID semantic transaction mechanism used to ensure transactional atomicity, consistency and durability at the partition layer, and by opening Zoohttp: //www.aliyun.com/zixun/aggregation/19458.html "> Keeper or in-memory lock mechanism to ensure transaction isolation.Data flow intake, slow changes in dimension, data restatement of these new use cases in the new version has become possible, of course, there are still some deficiencies in the new Hive, Hive ...

China's cloud computing services market will reach $1.1 billion trillion in 2014 and will grow at a compound rate of nearly 45% per cent in the future, according to the latest figures released by US market research companies. Of these, more than 55% of the market is from the application software that is the service market contribution, mainly including the software vendors through the cloud computing way to provide SMEs with the financial, business management and collaboration applications. Cloud services for the first time to pull the domestic IT industry to the international advanced countries at the same time starting the starting line. And the domestic traditional software vendors, need to cross the cost, technology, market, talent and other heavy ...

Apache Cassandra is a highly performance, scalable, distributed NoSQL database with a flexible, simple partitioned row storage data model that can be used to deal with commercial servers and massive data storage across data centers without a single point of failure. It was originally developed by Avinash Lakshman (Amazon Dynamo developer) and Prashant Malik on Facebook to address their inbox-search problems, then officially open source in July 2008, and since then ...