deepdyve research

Redis Research (6)-set type, redis research set type I. Introduction A set key can store up to 2 ^ 32-1 strings. In Redis, the set type is implemented using an empty hash table, so the operation complexity is O (1 ). The Union, intersection, and difference set operations can also be performed between multiple set type keys. Ii. Commands 1. Add/delete Elements sadd key membersrem key member Sadd is used t

Redis Research (13)-security and communication protocols, redis research communication protocols I. Security Salvatore Sanfilippo, author of Redis, once published the Redis declaration, which mentions Redis to be concise and beautiful. Redis does not do much work at the security level.1. trusted environmentThe Redis security design is based on the premise that "Redis runs in a trusted environment". During t

Redis Research (14th)-management tools, redis research toolsTo do well, you must first sharpen your tools. When using Redis, if you can effectively use various Redis management tools, it will greatly facilitate development and management. I. redis-cliI believe you are familiar with redis-cli. As the command line client of Redis, you can find it from any server installed with Redis, therefore, Redis-cli is

Redis Research (11)-data persistence, redis Research DataRedis's strong performance is largely due to the fact that it stores all the data in the memory. In order to ensure that Redis will not lose data after the restart, data needs to be synchronized from the memory to the hard disk in some form. This process is persistent. Redis supports two methods of Persistence: RDB and AOF. Either of them can be used

Redis Research (9)-ordered set type 2, redis research set type The previous article has talked about some commands of the ordered set type. Http://blog.csdn.net/wtyvhreal/article/details/42804571 Iii. Command collection 1. Get the number of elements in the Set zcard key 2. Obtain the number of elements in the specified score range. 3. delete one or more elements The returned value is the number of

In-depth research on Singleton mode and in-depth research on Mode The Singleton mode is a common software design mode. Its core structure only contains a special class called Singleton class. The Singleton mode ensures that there is only one instance in a class in the system and the instance is easy to access, so as to conveniently control the number of instances and save system resources. If you want to ha

Pig's initial research: Delano's preliminary research Pig environment Installation Pig's installation is very simple. Decompress pig-0.14.0.tar.gz to the appropriate directory. Tar-zxvf pig-0.14.0.tar.gz Modify environment variables: # Pig export PIG_HOME =/usr/local/cloud/pig-0.11.1/pig-0.11.1export PATH =.: $ PIG_HOME/bin: $ PATHexport PIG_CLASSPATH = $ HADOOP_HOME/etc/hadoop # To enable pig to identify

-on experiments, so that all the presence of developers to experience the automation of software development, release, operations to bring convenience and efficiency.In the next few weeks, we will also hold similar free training in Shanghai, Shenzhen, Beijing, the west, Microsoft to promote, interested friends can contact with their own unit of Microsoft sales, get free tickets.Figure 1-Microsoft China Development Tools Sales Boss (Dr. Yip) speechFigure A live DemoFigure 3– Basic BurstingHttp://

- Advanced series - Learners series articlesThis article is the author of the opening of the open source of software, follow-up will be on the software open source content classification introduced, I hope that the domestic open source field can be more and more good, so that the vast number of programming enthusiasts to find and use these valuable open source software content as soon as possible.ETC. For open source content, long ago wanted to record down, but because of various time issues di

[Kernel Research] processor _ Handler, kernel research _ handler Although MessageQueue provides direct read/write function interfaces, it generally does not directly read/write message queues to programmers. The Handler get type is exactly Handler. /** * Run the message queue in this thread. Be sure to call * {@link #quit()} to end the loop. */ public static final void loop() { L

I bet you don't know. At Microsoft's Chinese Research Institute, we have many world-class multimedia research experts. -- Bill Gates Dr. Lee Kai-Fu Dr. Zhang yaqin Dr. Zhang HONGJIANG Dr. Shen Xiangyang Dr. Xu fengxiong Dr. Zhang yizhao Dr. Guo baining Dr. Wang Jian Lin Bin Dr. Ma weiying Dr. Zhou Ming Dr. Zhu wenwu

August mid-summer vacation to Lenovo North Research intern interview, interview position is embedded Linux research and development engineer. After the second day of the resume, the supervisor replied to my e-mail, meaning that any time to interview, to the north when the time to give him a call on the line. So I reply to a message to thank, and about the next day 9:30 A.M. to.Into the north of the

Mobile phone sensor research, sensor researchZookeeper How smart phone Accelerator works (explanation video ): Http://jandan.net/2012/05/24/smartphone-accelerometer.html [Android Note 5] Android Sensor introduction (I) acquisition of gravity Sensor Acceleration Http://blog.csdn.net/octobershiner/article/details/6639040 [Android Note 6] Android Sensor introduction (2) refresh the UI in the thread. An example of creating an android Dynamometer

In-depth research on containers, insufficient researchGenerally: The basic idea of a ing table (also called an associated array) is the key-value (pair) Association maintained by the ing table, so you can use the key to find the value. The standard Java class library contains several Map implementations, including HashMap, TreeMap, LinkedHashMap, WeakHashMap, ConcurrentHashMap, and IdentityHashMap. They all have the same basic interface Map, but t

The national medium-and long-term education reform and Development Program outline (2010-2020) clearly pointed out: "Strict teacher qualification, improve the quality of teachers, and strive to create a virtuous, professional, reasonable structure, full of vitality of the high-quality professional teacher team." At the same time, "colleges and universities should support students to participate in scientific research and strengthen practical teaching

Research on SSI problem in Nginx and Nginxssi problem Recently feel very cool, this project team did not have a special PHP, I was the first to come in to do PHP (and of course, front end), haha, I will design and modify the appropriate PHP framework for our business, haha, the feeling will learn a lot of things look, a few days ago in the group 20 of several predecessors speak PHP framework, And Daniel to discuss the appropriate PHP framework for us

My personal summary of my post on graduate students. I am about to graduate soon. I have been in a fairly good engineering university in China for more than two years, I think it is really a waste of time to study in China (the same is true for students in other schools), at least for most people. If you are lucky, you may encounter a poor mentor, it is not just a waste of time, but it is probably bad for many doctoral masters to skip the building. At present, the comrades in

Research on Application Development of GPS Beidou dual-mode technology-Research on Application Data Interaction and gps Development Research on Application Development of GPS Beidou dual-mode technology-Application Data Interaction The Android development principle is that anyone who is interested in which data can listen through the listener. This is certainly

[In-depth research on Java] 6. Detailed explanation of CGLib dynamic proxy mechanism, in-depth research on cglib I. First, let's talk aboutDynamic proxy in JDK: The dynamic Proxy in JDK is implemented through the reflection Proxy and the InvocationHandler callback interface. However, the class for dynamic proxy in JDK must implement an interface, that is, only the methods defined in the interfaces implement

Ours Facebook Technology Research Report (2)-data table Design --- Xu Zhaoyuan/FLxyzsby@163.com [Opening] Database Version selection. Chapter 1 Requirements Analysis of ours Facebook Database 1.1 view Facebook's Data Structure 1.2 Basic Requirements of ours Facebook Data Structure [Opening part] Database Version selection. At present, MySQL has been developed to version 5.0 or above. The table definition and creation of this table are