How To Become A Sql Dba

In our last database Engineer http://www.aliyun.com/zixun/aggregation/10529.html "> Pay survey Report, Oracle DBA has the highest average revenue, This has changed in 2013. With the advent of the big data age, the majority of employees, including Hadoop and NoSQL-related technologies, earned more than average. According to this survey, Hadoop practitioners have the highest average annual income of 13 ...

In our last database Engineer http://www.aliyun.com/zixun/aggregation/10529.html "> Pay survey Report, Oracle DBA has the highest average revenue, This has changed in 2013. With the advent of the big data age, the majority of employees, including Hadoop and NoSQL-related technologies, earned more than average. According to this survey, Hadoop practitioners have the highest average annual income of 13 ...

With regard to NoSQL and SQL, it is well known that NoSQL only allows data to be accessed in restricted predefined modes. For example, DHT (Distributed Hash Table) is accessed through the Hashtable API. Other NoSQL data service access modes are also restricted. Scalability and performance structures are therefore predictable and reliable. In SQL, access patterns are not known beforehand, SQL is a common language that allows data to be accessed in a variety of ways, and programmers have limited control over the execution capabilities of SQL statements. In other words, in s ...

What is the real difference between NoSQL and SQL? Essentially, because different access patterns lead to differences in NoSQL and SQL scalability and performance. NoSQL only allows data to be accessed in restricted predefined modes. For example, DHT (Distributed Hash Table) is accessed through the Hashtable API. Other NoSQL data service access modes are also restricted. Scalability and performance structures are therefore predictable and reliable. In SQL, access patterns are not known beforehand, and SQL is a ...

What is the operation of most small and medium-sized enterprises? Configuration services, coordinated on-line, service monitoring, data backup, there are unavoidable to do coolie to carry the machine?? If one day, all this no longer need people to do, what should you do? The change in operation Dimension is becoming more and more obvious as cloud computing lands. Recently, a friend to do yun-dimensional chat with me when feeling, said that feeling now the whole industry's hot spots in the development field, suddenly feel that there is no development in the field of operation and maintenance. Before that, I was in the garage open source group with white clean chat, they also coincide ...

As a software developer or DBA, one of the essential tasks is to deal with databases, such as MS SQL Server, MySQL, Oracle, PostgreSQL, MongoDB, and so on. As we all know, MySQL is currently the most widely used and the best free open source database, in addition, there are some you do not know or useless but excellent open source database, such as PostgreSQL, MongoDB, HBase, Cassandra, Couchba ...

According to the IDC survey, global data volumes reached 1.2ZB at the end of 2010. By 2020, global electronic devices will have a 30 times-fold increase in data storage, up to 35ZB (equivalent to 1 billion 1TB of hard disk capacity). But for the prepared enterprise this is undoubtedly an information gold mine, with the progress of data mining technology, valuable information will become easy to obtain. With the advent of the large data age, data storage, data mining, and processing and analysis of large data-related technologies are more concerned than ever. Big data is becoming the cornerstone of enterprise development, and gradually ...

How fast is the tide of big data? IDC estimated that the amount of data produced worldwide in 2006 was 0.18ZB (1zb=100), and this year the number has been upgraded to a magnitude of 1.8ZB, which corresponds to almost everyone in the world with more than 100 GB of hard drives. This growth is still accelerating and is expected to reach nearly 8ZB by 2015. The storage capacity of the IT system is far from adequate, let alone digging and analyzing it deeply. In this article, Baidu Chief scientist William Zhang, Teradata Principal customer Officer Zhou Junling, Yahoo!...

How fast is the tide of big data? IDC estimated that the amount of data produced worldwide in 2006 was 0.18ZB (1zb=100), and this year the number has been upgraded to a magnitude of 1.8ZB, which corresponds to almost everyone in the world with more than 100 GB of hard drives. This growth is still accelerating and is expected to reach nearly 8ZB by 2015. The storage capacity of the IT system is far from adequate, let alone digging and analyzing it deeply. In this article, Baidu Chief scientist William Zhang, Teradata Principal customer Officer Zhou Junling, Yahoo! North ...

As data grows in hundreds of terabytes, we need a unique technology to address this unprecedented challenge. Big data analysis ushered in the great era of the global organizations of all walks of life have realized that the most accurate business decisions from the facts, not a figment of the imagination. This means that they need to use the decision model and technical support based on data analysis in addition to the historical information of the internal trading system. Internet-clicked data, sensing data, log files, mobile data with rich geospatial information and various kinds of comments involving the network have become various forms of mass information. ...