Linux Performance Troubleshooting

For small and medium-sized enterprises, there are many free and open source router and firewall solutions, even as a business choice. 　　Many of these products offer LAN services, such as VPN services, hotspot gateways, and the use of mandatory network portals to share wireless networks. Here, the editors find open source and free router projects that are suitable for businesses that include small businesses, midsize, and even the size of Cisco and Juniper.  Gossip Less, we look at these seven open source and free Linux network operating system. &nb ...

"Tenkine Server channel December 16 News" Denver local time November 19, held here in the SC13 Global Top500 Awards ceremony, the organizing committee announced from China's National Defense Science and Technology University team to 8.22 trillion times per second Linpack results obtained SC 　　13 Global University students Super Computer Competition computing performance, this is the national defense hkust after ISC 12, SC 12 after the third time the title. As the "Highest Computational performance award" of the defending champion, the National Defense Science and Technology University in the competition set ...

"Tenkine Server channel December 19 message" This tower is a perfect combination of price advantage, reliability, collaboration, and data protection to improve business continuity and productivity, and is the ideal choice for a small business's first server. The tower server is relatively flexible and practical, and can be easily used without cabinet support, the Dell T110 Tower Server introduced today is a needle for small business products, carrying the core processor processor, and standard 2G memory, 500G hard drive. 　　The performance is good, and the stability is extremely strong. This paragraph ...

Last year in the investigation of a lot of java applications, see some of the phenomenon is the programmer to run on their own environment to read the program rarely lead to troubleshooting problems will be more frustrating, so think of writing this series of articles, procedures To provide functionality to end-users, the code is only one part of it, and it needs to be relied on for jvm, os, server hardware, networking, load balancing, etc. In this series of articles, Several parts, more is only a science role, because os I use are linux, this series ...

Hadoop is a highly scalable, large data application that can handle dozens of TB to hundreds of PB of data through fewer than thousands of interconnected servers. This reference design realizes a single cabinet of Hadoop cluster design, if users need more than one cabinet of Hadoop cluster, can expand the design of the number of servers and network bandwidth easy to achieve expansion. Hadoop solution The features of Hadoop design Hadoop is a low-cost and highly scalable large data place ...

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 ...

The year of the Snake promotion, Dell launched a e7-4807-based rack server R910, adhering to Dell's excellent design tradition, with excellent flexibility and manageability. 　　At present, there are businesses to the product promotion, the price is 31500 yuan, interested friends may wish to pay attention to. Dell's PowerEdge R910 configuration, this product comes standard with 2 1.86GHz new generation Xeon e7-4807 processors, 6 core share 18MB three cache, and a higher level Intel 7500 motherboard chipset ...

Dell R620 is Dell's newest rack server product, an ultra-high density 1U rack dual server with massive memory configuration and excellent I/O options, ideal for a space-constrained environment. Recently, some businesses are on the server product model Dell PowerEdge R620 (Xeon Quad-core e5-2609 (2.4ghz-10m)/8g/300g SAS 2.5*2/DVD/700W/8 Disk/three years) spot special promotions, Promotional price of 13000 yuan incl. VAT invoices, the proposed ...

"Tenkine Beijing March 27 News" Dell PowerEdge R420 belongs to dual-channel 1U rack server products. With double density, strong performance and high scalability. To meet the needs of computing-intensive enterprises. This product uses the newest Xeon E5-2400 series processor, supports 12 memory, the built-in two third generation PCIe socket, and may provide the sufficient I/O bandwidth. Recently, there are businesses on the server product model Dell PowerEdge R420 (E5-2420*2/32G/1TB sas*3/...

"Tenkine Beijing March 29," Dell R620 is Dell's latest rack server product, is a ultra-high density 1U rack dual server, with a large memory configuration and excellent I/O options, is a space-constrained environment ideal platform. Recently, there are businesses on the server product model Dell PowerEdge R620 (e5-2603 (1.8g-10m)/4G*4/300G*3/H310/DVD/495W/8 disk/three-year) spot special promotions, promotional price of 14300 CNY incl. VAT invoices ...