Java 2017

Here to find year-end inventory counts 2017 top 20 hot topics in Yunqi Community (with 100+ topic list)

1, Cluster strategy analysis: I have only 3 computers, two ASUS notebook i7, i3 processor, a desktop PENTIUM4 processor. To better test zookeeper capabilities, we need 6 Ubuntu (Ubuntu 14.04.3 LTS) hosts in total. The following is my host distribution policy: i7: Open 4 Ubuntu virtual machines are virtual machine name memory hard disk network connection Master 1G 20G bridge master2 1G 20G ...

Reminder: If idear or eclipse to run under the IDE you must use the directory on the HDFS to assign permissions to users under windows, for convenience, to all permissions recommended 777 create a directory command hdfs dfs-mkdir myproject Assign permissions command hdfs dfs-chmod 777 myproject HDFS CRUD tools hdfs; import org.apache.had ...

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.

Before 2013, there may be a wait-and-see or scepticism about the cloud, but after a year of development, cloud computing has completely landed: Big companies are busy with how to deliver faster, more stable and safer cloud services, how to snatch users in the cloud market, and small companies to consider how to use cloud computing to reduce their operating costs. How to make your system into a cloud structure; startups think about how to use the cloud to reduce upfront spending, and even how to use the concept of "cloud" to start a business and sell yourself in front of a VC. According to Gartner, 2013 Global ...

Zookeeper cluster mode can not deploy the cloud server [java.net.BindException: Unable to specify the requested address (Bind failed)] solution. The main text In the cloud server (Aliyun, Tencent cloud) on the deployment of Zookeeper cluster mode, there are many reasons for the failure, the Internet mainly refers to the port is occupied (not open) and firewall open two kinds of problems, a lot of similar blog, this article is not To repeat. If you've already made changes for both of the above two cases and still have not been successful, then maybe ...

Big data has grown rapidly in all walks of life, and many organizations have been forced to look for new and creative ways to manage and control such a large amount of data, not only to manage and control data, but to analyze and tap the value to facilitate business development. Looking at big data, there have been a lot of disruptive technologies in the past few years, such as Hadoop, Mongdb, Spark, Impala, etc., and understanding these cutting-edge technologies will also help you better grasp the trend of large data development. It is true that in order to understand something, one must first understand the person concerned with the thing. So, ...

Big data has grown rapidly in all walks of life, and many organizations have been forced to look for new and creative ways to manage and control such a large amount of data, not only to manage and control data, but to analyze and tap the value to facilitate business development. Looking at big data, there have been a lot of disruptive technologies in the past few years, such as Hadoop, Mongdb, Spark, Impala, etc., and understanding these cutting-edge technologies will also help you better grasp the trend of large data development. It is true that in order to understand something, one must first understand the person concerned with the thing. So, ...

Big data will become the cloud of the year. This is the inevitable result: over time, the enterprise produces more and more data sets, including customer purchase preference trends, site visits and habits, customer review data, etc. so how can you put so much data into a comprehensive form? Traditional business intelligence (BI) tools ( relational databases and desktop math packages are a bit out of the way to deal with such a large amount of data in a business. Of course, the data analysis industry also has development tools and frameworks, ...

Large data, the entry coincides with its time, in recent years, large data is not a fire, especially in 2017, the development of large data industry was written into the government's work report, large data began not only in the enterprise strategy, but also began to appear in the government's planning, can be said to be the darling of the 1, the importance of large data in recent years, with the development of science and technology, the rapid progress of computer technology, large data and intelligent operational dimension is becoming more and more important. On the big side, big data will play an important role in promoting China's economic transformation: first, through the analysis of large data can help solve China ...