Spark Streaming is the core API of Spark, which supports high throughput and fault-tolerant real-time streaming data processing. It can accept data sources from Kafka, Flume, Twitter, ZeroMQ and TCP Socket, use simple API functions such as map, reduce, join, window and other operations, and can also directly use built-in machine learning algorithms and graph algorithm packages to process data . Interested friends can come and take a look

The introduction of the new concept of profile makes managing IBM® WebSphere® Application Server easier. WebSphere Application Server V6 introduced the concept of profiles to physically separate product binaries from user data and enable users to define multiple sets of user data. Prior to WebSphere Application Server version 6, product binaries and user data were located in the WebSphere installation directory;

Lucene is a sub-project of the Apache Software Foundation 4 jakarta project team. It is an open source full-text search engine toolkit, but it is not a complete full-text search engine, but a The architecture of the full-text search engine provides a complete query engine and index engine, and some text analysis engines (in two Western languages, English and German). The purpose of Lucene is to provide software developers with a simple and easy-to-use toolkit to easily implement the full-text search function in the target system, or to build a complete full-text search engine based on it. Lucene provides a simple but powerful application programming interface that can perform full-text indexing and search. Lucene is a mature free and open source tool in the Java development environment. On its own, Lucene is currently and in recent years the most popular free Java information retrieval library. Information retrieval libraries are often mentioned, and although they are related to search engines, they should not be confused with search engines. The use of Lucene is based on a huge index library. Generally speaking, when we search, we do not search directly in the database, but directly from the index library, because the index library is binary format, so the retrieval speed is very fast. Therefore, when we use Lucene to search, we must first create or obtain an index library.

This document mainly talks about the installation and configuration of the Ubuntu operating system; I hope it will be helpful to everyone. Interested friends can come and take a look.

This document is an Eclipse Maven tutorial; I hope it will be helpful to everyone in learning Eclipse Maven; Directory: 1 Create a new Maven project (Sample Maven project) 3 2 Create a new Maven project (sample Maven Webapp project) 7 3 Add Maven dependencies to the Web project 11

This document mainly talks about the installation of PhoneGap; I hope this document will help friends in need; interested friends can come and take a look.

This article is a summary of git version control and workflow. If some friends have not used git before and are not very familiar with the basic concepts and commands of git, you can start with the following basic tutorials: Git is a distributed version control system. Compared with a centralized version control system similar to SVN, although a centralized version control system can enable multiple team members to collaborate on development, sometimes if the central If the server is down, no one can submit updates and collaborate on development during the downtime. Even sometimes, if the central server disk fails and there happens to be no backup or the backup is not timely, there may be a risk of data loss. Interested friends can come and take a look

This document mainly talks about running scala programs (sbt and command line methods) based on spark; I hope this document will help friends in need; interested friends can come and take a look

This document mainly talks about the construction of Asset server server for Unity3D game development; Asset Server is currently the resource version management tool that comes with Unity. It is similar to the SVN and perForce we are usually familiar with. However, for the current Unity, Asset Server is more powerful than Unity. Version control software such as SVN and perForce are easier to use, because the Unity3.x version does not support software such as SVN very well. When multiple people work together, data loss and other situations often occur. Therefore, this article focuses on how to build Asser Server. As for daily usage, it is actually very similar to the usage of software such as SVN, so I won’t go into details here. Friends in need can download and take a look

This document mainly talks about the eclipse maven project configuration instructions; the purpose of writing this article is to solve a series of problems caused by environmental problems, such as class not found exceptions, old and new JARs, resulting in some methods being unavailable, and hot plugging is supported. Modification, when debugging the program, there is no need to restart tomcat and other problems after modification; interested friends can come and take a look

This document mainly talks about Lucene index optimization; this article mainly introduces how to improve the indexing speed of Lucene. Most of the ideas introduced are easy to try, but of course others may increase the complexity of your program. So please confirm that the indexing speed is indeed very slow, and the reason for the slowness is indeed caused by Lucene itself; I hope this document will help friends in need; interested friends can come and take a look

This document mainly talks about developing Spark applications using Scala language; the Spark core is developed in Scala language, so it is natural to use Scala language to develop Spark applications. If you are not familiar with the Scala language, you can read the online tutorial A Scala Tutorial for Java Programmers or related Scala books to learn. This article will introduce three Scala Spark programming examples, namely WordCount, TopK and SparkJoin, which represent three typical applications of Spark. I hope this document will help friends in need; interested friends can come and take a look