nosql scalability

Java concurrent programming and scalability (3)Avoid hotspot domain For example, the size of a hashmap. The optimization method is to add a counter. But for ConcurrentHashMap. When performing concurrent operations on the counter, the counter needs to be changed each time put and remove. Therefore, in this class, this counter is called a hot point domain, which is the bottleneck of scalability. So the metho

primary database copy, the changes are delayed and can be quickly recovered from user or application errors. By extending the DB2 pureScale Feature with Q Replication, you can achieve scalability, reliability, and transparency, while ensuring the protection and continuous availability of remote replicas. This article will discuss the considerations of this solution and introduce how to deploy the Q Replication and DB2 pureScale Feature in combination

PHP 7 Installation and Use experience greatly improves performance, strong compatibility, and insufficient Scalability (be cautious when upgrading PHP). Be cautious when installing and using PHP 7. With the release of PHP 7, the performance and compatibility of PHP 7 have become a hot topic for discussion over the past few days. The high performance of PHP 7 has made many people eager to get started, some "early adopters" have applied PHP 7 to the pr

Performance and Scalability I. Law of Amdahl1. The relationship between issues and resourcesIn some cases, the more resources are resolved faster, the more the problems are the opposite:Note: Each program must have a serial part, and reasonable analysis of the serial and parallel parts of the program has a great impact; the relationship between serial part ratio and multicore execution efficiency is exponential level2.ConcurrentLinkedQueueIn a multico

connection being depleted and to help the application expand. The following precautions must be taken to achieve optimal connection use: Explicitly close the connection now The application component invokes the Getconnection method on the connection factory to obtain an EIS connection. The returned connection instance represents an application-level handle to the underlying physical connection. After the application component completes the use of this connection, you should close the connect

Improve Linux kernel and adapt scalability to the enterprise environment-general Linux technology-Linux programming and kernel information. The following is a detailed description. The first step to improve Linux performance is to quantify it. But how can we precisely quantify the performance of Linux or its equivalent system performance? In this article, members of the IBM Linux technology center described several benchmark program tests they perform

Many programmers spend a lot of time tuning application-level performance bottlenecks as they address JVM performance issues, and when you finish reading this series you will find that I might look at this kind of problem more systematically. I've said that the JVM's own technology limits the scalability of Java enterprise-class applications. First, let's start by listing some of the leading factors. The mainstream hardware server provides a

Many programmers spend a lot of time tuning application-level performance bottlenecks as they address JVM performance issues, and when you finish reading this series you will find that I might look at this kind of problem more systematically. I've said that the JVM's own technology limits the scalability of Java enterprise-class applications. First, let's start by listing some of the leading factors. The mainstream hardware server provides a

Importnew Note: JVM performance Optimization series first 4 articles by importnew translation (first, second, third, fourth). This article was submitted by Sina Weibo: Wu Jie (@WildJay) to Importnew. Thanks Wu Jie! If you wish to share a good original article or translation, please submit it to importnew. Many programmers spend a lot of time tuning application-level performance bottlenecks as they address JVM performance issues, and when you finish reading this series you will find that I might

System scalability is the main reason for promoting the development of NoSQL, including distributed system coordination, failover, resource management and many other features. So that NoSQL listening System scalability is the main reason for promoting the development of NoSQL