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－－－－－－－－－－－－－－－－－－－－－－－－－－－  Index creation, update and deletion in single mode －－－－－－－－－－－－－－－－－－－－－－－－－－－ －－－－－－－－－－－－－－－－－－－－－－－－－－－  Initialize Index Indexes can be initialized before they are created. For example, specify the number of shards and the number o ...

Address of this article http://blog.csdn.net/makefriend7/article/details/60323717 First put the official address https://www.elastic.co/guide/en/elasticsearch/plugins/5.2/index.html 1. Introduction to Plug-ins Plug-in, as you know by name, is to insert something on ES to enhance ES's ability. Here's a brief introduction to th ...

Students who make customized ROM must have such experience: the company requires to add some pre-installed applications in customized ROM, there are two main types: 1) the project developed by the company has source code; 2) other applications, only the apk installation package. 1. Active code. [Source source director ...

Since October 27, 2011, Dubbo has been used by many non-Ali companies, including Dangdang Networks, NetEase Koala and other Internet companies, as well as China Life, Qingdao Haier and other large traditional enterprises. More user information, access to Dubbo @GitHub，issue#1012: Wanted: who's using dubbo. Since December last year, Dubbo 3.0 ...

1. Mapper and Schema scheme: Transform the data format that kafka passes to spout. record->tuple mapper: Transform the data format from storm to kafka.tuple->record 2. Why customize the message format In many cases, the data passed from Kafka is not a simple string, it can be any object. The default new Fields("bytes") is not ap ...

Why use SpringBoot? SpringBoot is a new framework provided by the Pivotal team designed to simplify the initial build and development of new Spring applications.The framework is configured in a specific way so that developers no longer need to define a template configuration.In this way, Spring Boot is committed to becoming a leader in the bur ...

Combiner concept Combiner is known as the local Reduce, and Reduce's input is the final output of Combiner. In MapReduce, when the data generated by map is too large, bandwidth becomes a bottleneck. How to compress the data transmitted to Reduce without affecting the final results? One way is to use Combiner, which is known ...

Tomcat introduction The development language of LNMP framework is PHP language. PHP is a very popular language for developing web programs. In the early years, asp was popular. It is a programming language running on Windows platform. However, because of its poor security, website developers began to switch to php, and PHP is relatively safe ...

maven Practical Tips Multithreading and Skipping Tests # Build with four threads and allocate one thread per core based on the number of CPU cores $ mvn -T 4 clean install $ mvn -T 1C clean install -DskipTests # Do not execute the test case, but compile the test case class to generate the corresponding class file under target/ ...

Principle and introduction of ELK Why ELK is used: In general, we need log analysis scenarios: grep, awk can get the information we want directly in the log file.However, in large-scale scenarios, this method is inefficient and faces issues such as how to archive logs when the volume is too large, how to search text too s ...