Big Data

The cloud storage solution with NoSQL technology is maturing, but the idea of SQL database dominates. This can lead to the use of SQL to resolve NoSQL data modeling issues. Based on the author's Cassandra Project development and project implementation experience, this paper makes some brief guidance on NoSQL modeling. The article does not have the specific syntax guidance data modelling, these questions please refer to the Apache website. Cassandra has been upgraded to the top-level project of the Apache organization. Currently maintain a very fast development upgrade speed. Apache ...

Cassandra 1.0 provides data compression based on columnfamily, which is also a function of the people's voice. Compression can effectively reduce the volume of data, but also reduce disk I/O, especially for those who read many of the scenarios. What are the benefits of compression compression can effectively reduce the volume of data, you can store more data on the same memory and disk. In addition, by decompressing only the data blocks of the specified portion, Cassandra also improves the performance of reading data from disk. Unlike traditional database systems ...

Data encryption and decryption are very important in the security field. For programmers, storing user passwords in ciphertext in a database is important to intruders who plagiarize users ' privacy. There are a variety of front-end encryption algorithm can be used for data encryption, decryption, I recommend a simple database-level data encryption, decryption solution. Take the MySQL database as an example, it built the corresponding cryptographic functions (Aes_encrypt ()) and decryption functions (Aes_decrypt ()). Inserts encrypted data into the table insert in ...

The National Institutes of Health announced that all data from the thousand Genome Project would be opened for free. NetEase explores the March 31 report of the spectrum.ieee.org website, the National Institutes of Health announced 29th that all data on their thousand Genome Project will be opened for free. These data totals reach 200TB, the world's largest human genetic mutation dataset. Amazon's cloud computing company-Amazon Web Services-will store the vast database. The thousand-person Genome project aims at how genetic variability affects health as well as with disease ...

Cloud computing and data warehousing are a reasonable couple. Cloud storage can be scaled on demand, and the cloud can contribute a large number of servers to a specific task. The common function of Data Warehouse is the local data analysis tool, which is limited by calculation and storage resources, and is limited by the designer's ability to consider the new data source integration. If we can overcome some of the challenges of data migration, the problem can be solved by moving a data warehouse and its data analysis tools from dedicated servers in the datacenter to cloud-based file systems and databases. Cloud data management is often involved in loading and maintaining text in Distributed File systems ...

With the release of SQL Server 2012, SQL Server LocalDB jumped into our eyes. SQL Server LocalDB is a lightweight, easy-to-use database. SQL Server LocalDB can maximize your database management effort so developers can focus on developing database applications. Using the SQLLOCALDB command line management localdb for ease of administration, LOCALDB provides a database based on the command line ...

SQL injection attacks are known to be the most common Web application attack technologies. The security damage caused by SQL injection attacks is also irreparable. The 10 SQL tools listed below can help administrators detect vulnerabilities in a timely manner. bSQL Hacker bSQL Hacker was developed by the Portcullis Lab, bSQL Hacker is an SQL Automatic injection tool (which supports SQL blinds) designed to enable SQL overflow injection of any database. bSQL ...

Today, internet-based applications face many challenges. Users expect to be able to use any device to access data anytime, anywhere. However, the size of the data, the interactive format of the data, and the size of the user's access may change at any time. Developers must quickly build and deploy new applications to meet these evolving needs. 　　With traditional data management platforms, it is necessary to continuously invest in servers, operating systems, storage, and networks to meet the growth and change of these requirements. Database services in the cloud, such as Microsoft's SQL Azure, provide a new way to deal with ...

How do we pick out the data we want when we meet a huge amount of data in our daily work? Is it a blind search, or is it a search for a new solution or a trick to get it? When designing a data form, developers tend to follow three commonly used forms, which they consider to be the only way to design. However, since the developer had this mindset at the outset, the design of the data form became entrenched and hindered its innovation. Author Shivprasad from the usual work of the project accumulated some experience, introduced us to 11 of the production of data form ...

In recent years, cloud computing has become a research hotspot in the field of distributed computing, which refers to the application of software and hardware in the data center to provide service on demand through the Internet, and the software and hardware resources in the data center collectively as cloud, cloud computing itself is not a new technology, but a kind of service mode This model can be used to outsource equipment installation and resource management to cloud service providers, with the characteristics of billing and scalability, through the unified deployment and centralized management of IT resources, cloud computing can optimize the utilization of resources and provide users with low-cost, efficient and reliable services. Virtual Table ...

In peacetime is asked the most questions about the MySQL database performance optimization issues, so recently intended to write a MySQL database performance optimization of the series of articles, I hope that the junior high level MySQL DBA and other interested in MySQL performance of friends to help. Databases are IO-intensive applications whose primary responsibility is data management and storage. And we know that the time to read a database from memory is the microsecond level, and reading an IO from a common hard disk is at the millisecond level, both ...

The builders of Data Centers (DCs) will focus more on servers, storage and other IT equipment, even for the builders concerned about infrastructure, power distribution, refrigeration will also become their focus, integrated wiring often become a supporting role, or even become a "crowd actor", the result is the data center of the "whole scene" Lack of vitality. High return on investment in the background market consulting firm Canalys data show that the global data center infrastructure reached $26.2 billion trillion in the third quarter of 2011, up 2.7% from the previous quarter. Market Analysis Company ...

(Author Srini penchikala translator Dingxuefeng) for non-relational data types such as documents, object graphs, and key-value pairs, the NoSQL database provides them with an alternative way to store data. Can distributed caching be used as a NoSQL database? Ehcache's Greg Luck author describes the similarity between distributed caching and NoSQL databases. Infoq interviewed him and discussed the pros and cons of the scheme. InfoQ: Can you do a distributed caching solution with the NoSQL database ...

Hortonworks, founded in July 2011 by Yahoo! and Benchmark Capital, announced a technology preview of a data platform based on Hadoop. The company employs the core of many Hadoop projects to provide appropriate support and training. Shortly after IBM announced a large data analysis platform based on Hadoop, a new but very important role--hortonworks, and already started to play on their hortonworks data flat ...

Memory computing, Hadoop and NoSQL are the three hotspots of large data analysis in the 2011. Curt Cotner, an IBM academician and DB2 General architect, said in a speech at the IOD2011 conference held in Las Vegas that the future direction of database development was the non-relational database NoSQL. At present, Google's BigTable and Amazon's dynamo are used NoSQL database, and the traditional relational database in dealing with ultra-high-scale, high concurrent SNS, web2.0 site has been powerless. IBM Institute ...

Data security has been a priority for financial services companies. But a series of cyber attacks by international hackers such as the recent "anonymous", combined with the public mistrust that followed the financial crisis, forced financial services companies to raise their cyber security to prevent data leaks and restore customers ' trust. While the victims of a series of major cyber attacks and data leaks in the 2011 years were Sony, PBS, the U.S. Senate, and even some large companies and government agencies such as the CIA and the FBI, security experts said financial services companies, which had always been the target of fraud, were moving ...

Today, China's information storage technology, a good news, a fully autonomous solid-state disk array system successfully published, this message has aroused widespread concern. According to the National Authority testing and certification, this breakthrough independent innovation results System full-featured, excellent performance indicators for aviation, aerospace, navigation, high-speed railway, industrial control, national defense and military industries and other fields, provide a complete security and reliable data storage program, has a broad application prospects. Information age and data are closely related, no matter information processing technology or information transmission technology are inseparable from the data, and information storage system as the data in ...

In recent years, corporate technology has changed more and more to cater to the needs of consumers. Mobile devices, social applications and cloud computing are all products of this trend. Whether you view this transformation of enterprise technology as beneficial, overly risky, or unavoidable, it is certain that enterprise IT security must quickly change and adapt to the new challenges of the moment, including overcoming cloud security, cloud storage, and cloud adaptation. At present, the development of consumer demand impact technology is becoming more and more obvious, and more and more industry analysts have found and written to describe this trend. Despite the clouds ...

U.S. reports show that tight it budgets are the biggest obstacle to recovery in data center operations. According to Emerson's business brand, "key business fully secure TM" global leader Emerson Network energy and the wave of the Institute of Research, a new study, the data center of accidental power loss per minute can exceed 5,000 U.S. dollars, including income and production losses, data damage and trust of stakeholders to damage caused by the loss, And the losses caused by the corresponding legal liabilities of the enterprise. In addition, blackout accidents are not uncommon, according to the study, 95% of U.S. companies in the past two years at least a data ...

In the current enterprise IT architecture, system administrators and DBAs will consider using the NoSQL database to solve problems that the RDBMS cannot solve, especially the internet industry. Traditional relational databases store data mainly as tables (table), and cannot meet the challenge of unstructured data. In the process of data standardization, the performance of relational database is encountering bottleneck. NoSQL, as its name suggests, is Not-only SQL, which can be a good complement to relational databases. In the report before the TechTarget database, ...