ea servers back up

Performance Analysis and Optimization of CentOS servers As a Linux system administrator, the most important task is to optimize system configuration so that applications can run in the optimal state on the system. However, hardware, software, and network environments are complex and changeable, as a result, the optimization of the system becomes abnormal and complex. How to locate the performance problem is a major problem in performance optimization.

Low-end servers are a batch market and also a vital market for Sun. IDC analysts pointed out that IT managers are increasingly inclined to buy cheap services from Sun. Behind this move, we can see that some vendors have begun to apply technologies in large hosts and high-end servers to low-end servers, such as virtual engines and dynamic allocation, we hope to im

A server, one of the most important resources is memory, memory enough, is directly related to system performance is the key.This article describes how to view the memory usage of Linux servers.1. Free commandFree-m[Email protected] ~]# free-mTotal used free shared buffers Cachedmem:1526 182 1344 0 16 99-/+ buffers/cache:65 1460swap:3071 0 3071It clearly shows how much memory is in total, how much has been used, and how much is left.A server, one of t

If you have more than one memcached server side, it is best to use memcache::addserver () to connect the service Frontend. instead of Memcache::connect () to connect to the memcached server, the PHP client uses the server pool to assign keys to different servers based on the algorithm. BOOLMemcache::Addserver(string$host[,int$port=11211[,BOOL$persistent[,int$weight[,int$timeout[,int$retry _interval[,BOOL$status[,Callback $failure _callback[,int$t

be connected. Net.ipv4.tcp_max_tw_buckets = 5000Indicates that the system maintains the maximum number of time_wait sockets at the same time, and if this number is exceeded, the time_wait socket is immediately cleared and a warning message is printed. The default is 180000, which changes to 5000.For Apache, Nginx and other servers, the parameters of the last few lines can be a good way to reduce the number of time_wait sockets, but for squid, the

Introduction to HTTP protocol Hypertext Transfer Protocol (HTTP) is located in the TCP/IP protocol application layer, is the most well-known protocol, but also one of the most core protocols in the interconnection network, the same, HTTP is based on C/s or B + + model implementation. In fact, the browsers we use, such as Netscape or IE, are the clients that implement the HTTP protocol, and some common Web server software such as Apache, IIS, and iplanet Web

start the installation, configuration, and testing of rsync and inotify.The following is the structure of 2 servers, respectively, hostname, IP, synchronized directory, and 2 servers are CentOS 6.5 release. Host Ip Docoment Server 192.168.10.58 /tmp Client 192.168.10.57 /tmp One, primary server (server)Where the primary

smtp| Server in the forum to see a lot of Master's speech, combined with their experience in practice, and finally have some comparative molding experience: The first thing to say is that two virtual SMTP servers are essential to prevent spammers from using your Exchange server for transit and other illegal uses of your SMTP service. This seems to be a very basic conclusion, but it is my "blood and tears" of the word. Because I used to rely on a vir

application are still on different application servers. This is mainly to facilitate employees from outside the enterprise access to the OA system. The advantage is that when a Web service suffers an attack that is not available, most employees are unable to access the OA system from outside the enterprise, without affecting the normal access of employees within the enterprise. However, I have made a similar mistake before. At that time, the enterpr

access|server|sqlserver| Access | server | links | data | database In WEB development, you often use an Access database. However, because access is a file-type database, Access cannot be made across servers. Through the author's exploration, we find that we can use the linked server of SQL Server to integrate the geographically dispersed Access database, so that the Access database has the ability to cross the Web server farm. By doing so, you can als