Json Functions

In the past few years, the innovative development of the open source world has elevated the productivity of Java™ developers to one level. Free tools, frameworks and solutions make up for once-scarce vacancies. The Apache CouchDB, which some people think is a WEB 2.0 database, is very promising. It's not difficult to master CouchDB, it's as simple as using a Web browser. This issue of Java open ...

Editor's note: The last period of time reproduced in the "5 minutes to understand docker! "Very popular, a short 1500 words, let everyone quickly understand the Docker." Today, I saw the author make a new novel, and immediately turned over. The reason to call this code reading as a fantasy trip is because the author Liu Mengxin (@oilbeater) in the process of reading Docker source, found a few interesting things: from the code point of view Docker did not start a new development mechanism, but the existing tested isolation security mechanism to use the full use, Including Cgroups,c ...

In Serengeti, there are two most important and most critical functions: one is virtual machine management and the other is cluster software installation and configuration management. The virtual machine management is to create and manage the required virtual machines for a Hadoop cluster in vCenter. Cluster software installation and configuration management is to install Hadoop related components (including Zookeeper, Hadoop, Hive, Pig, etc.) on the installed virtual machine of the operating system, and update the configuration files like Namenode / Jobtracker / Zookeeper node ...

The new PostgreSQL open source database is built into a widely used JSON data Interchange format and targets http://www.aliyun.com/zixun/aggregation/13461.html "> 　　MongoDB is the NoSQL market in the non relational data store represented. PostgreSQL released the first beta version of PostgreSQL 9.4 in Thursday. This beta includes a large number of Web applications for fast growth ...

In 2017, the double eleven refreshed the record again. The transaction created a peak of 325,000 pens/second and a peak payment of 256,000 pens/second. Such transactions and payment records will form a real-time order feed data stream, which will be imported into the active service system of the data operation platform.

Overview WEB attack is the mainstream technology of hacker attacks for more than a decade. The domestic manufacturers have long regarded WAF as the standard of security infrastructure. There are many security vendors in the market that offer WAF products or cloud WAF services. For the lack of their own security team, but also suffer from sql injection, xss, cc and other WEB attacks in the small and medium enterprises, the demand for WAF is also very urgent. WAF access to the current are the following: WAF products to buy security vendors using the cloud waf service, the domain name of the DNS server is set to cloud waf manufacturers to provide, or ...

In the past, Android development has matured, with Android-related development tools emerging. However, in the face of a variety of new things, do not forget those we use every day a large number of open source library. Here, I would like to introduce to you, in this hard-working family, the most popular developer favorite five Android libraries. 　　Hopefully, by understanding them, you can help with your development efforts. 1. Gson Gson is provided by Google for use between Java objects and JSON data ...

The intermediary transaction SEO diagnoses Taobao guest cloud host technology Hall from the plan, to the front and rear end of the development, finally to the test and on-line, lasted 4 months, 5,173 first page front-end performance optimization project finally smoothly on-line, and achieved the expected performance optimization goal. This project is not a revision, but the original home page design and function unchanged, only to do refactoring and optimization. 　　Although the project is called the front-end performance optimization, but it is not only the front-end unilateral work, to complete the optimization well, it requires the full complement of the front and back. Historical background ...

MongoDB is a product between relational database and non relational database, and is the most powerful and relational database in the relational database. The data structure he supports is very loose and is a JSON-like Bjson format, so you can store more complex data types. The biggest feature of MONGO is that the query language he supports is very powerful, and its syntax is somewhat similar to an object-oriented query language, which can almost achieve most of the functions of a single table query like relational database, and also supports indexing data. Just released MongoDB 1 ...

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 ...