Open Source High Availability

A, virtualization virtualization refers to the ability to simulate multiple virtual machines on the same physical machine. Each virtual machine has a separate processor, memory, hard disk, and network interface logically. The use of virtualization technology can improve the utilization of hardware resources, so that multiple applications can run on the same physical machine with each other isolated operating environment. There are also different levels of virtualization, such as virtualization at the hardware level and virtualization at the software level. Hardware virtualization refers to the simulation of hardware to obtain a similar to the real computer environment, you can run a complete operating system. In the hardware virtual ...

memcached high availability cluster theory and introduction. memcached In the realization of distributed cluster deployment, the memcached service is not between the communication, the distributed algorithm is through the client bar Data stored in different memcached, so when we finish the cluster client to write data inside, Will appear the following situation. After the client writes data to a memcached node, the other two nodes can not be queried. So how the outcome of this issue, is the next to be done. memcached ...

Last article we said memcached to achieve high availability and prevent a single point of failure can be implemented through magent, next we configure a highly available cluster magent proxy server: 192.168.200.101 memcached node: ( Can be on the same server to open three memcached node to see the previous introduction, can also be one server one memcached:192.168.200.100 11000 port memcached:192.168.2 ...

This article was translated by Wang Xiuli Jiangnan University Graduate School of Design, authors: Sabina Idler, only to see the original learning, declined to reprint. In recent years we have carefully studied child-centered design. The main reason for the study is to create awareness for the target group of children's designers. Adult designers are not able to design games, web pages, and applications for kids without the participation of targeted age groups. Of course, the experience of adults is complicated, and we always go to add some colors and dolls, while simplifying the interaction process, but these do not make it ...

When it consulting firm Opencredo plans to deliver three new applications to a major insurer in seven months, it has set itself three goals: shortening development time, allowing frequent customer changes, and architecting a system that can handle unpredictable traffic spikes. CEO Russel Miles believes that with the help of cloud foundry open source framework and other Open-source software, Opencredo has done "some heavy work", such as configuring virtual machines and adjusting storage volumes ...

Absrtact: In the view of Trebautiu, chief architect of Millet, the rapid iteration of the product makes the Internet enterprise have no chance of trial and error at all. To quickly innovate, quickly launch products and quickly occupy the market, the best way is to embrace open source, the use of open source software for their own hardware in the Millet chief architect Trebautiu, the rapid iteration of the product makes Internet companies have no chance of trial and error. 　　The best way to quickly innovate, quickly launch products and capture markets quickly is to embrace open source and use open source software to quickly build software platforms for their hardware products. Mi of millet ...

OpenStack has a very high popularity, Cloudstack has plenty of money, Eucalyptus and Amazon established a close relationship. OpenStack, created jointly by Rackspace and NASA in 2010, is undoubtedly highly popular. Now it has established partnerships with giants such as At&t, IBM and Hewlett-Packard, who are committed to OpenStack as the basis for their private cloud solutions. Another open source Cloud platform Cloudsta ...

Today, organizations are deploying or implementing virtualization technologies to improve the utilization and economics of IT infrastructures. With Data center virtualization, these enterprises drive the high availability and rapid recovery of critical applications. In recent years, virtualization technologies such as VMware, Jie, and Microsoft have dominated most of the data center's territory. However, business solutions are not only expensive to deploy and operational, but are also easily locked by vendors. Enterprise users want to maintain control over it, ensure that the underlying virtual platform is open, and have a strong ecosystem to support it. Red Hat and IB ...

Naresh Kumar is a software engineer and enthusiastic blogger, passionate and interested in programming and new things. 　　Recently, Naresh wrote a blog, the open source world's two most common database MySQL and PostgreSQL characteristics of the detailed analysis and comparison. If you're going to choose a free, open source database for your project, you may be hesitant between MySQL and PostgreSQL. MySQL and PostgreSQL are free, open source, powerful, and feature-rich databases ...

According to a recent report published by Gartner analyst Lydia Leong, companies are carefully evaluating open source cloud platforms. At the 2013 Beijing (International) Open Source Conference, we learned more about the development and application of open source cloud platform in China, which involved the main two open source cloud platform OpenStack and Cloudstack in the market now. In the afternoon of the venue, open source OpenStack promoter, China OpenStack User Group (cosug) promoter Du Yujie ...