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Memcached overview An open source high performance distributed memory object caching systemAll data is stored in memorySupport data of any storage typeSpeed up Web site access Memcached caching mechanism When the program writes the cache data request, the API interface of Memcached routes the KEY input routing algorithm module to a service i ...

Experimental schematic diagram Step 1: configure the squid proxy server #Remote share and mount source package [root@squid ~]# smbclient -L //192.168.142.1 [root@squid ~]# mount.cifs //192.168.142.1/squid /mnt #Decompress the source package [root@squid ~]# cd /mnt [root@squid mnt]# tar zxvf squid-3.4.6.tar.gz -C /opt #Install build environm ...

I. system environment Centos7 Two, installation   $ yum install -y firewalld III. basic startup command   $ systemctl status firewalld # View state $ systemctl start firewalld # start-up $ systemctl stop firewalld #Close $ systemctl enable firewalld ...

The forward proxy is a server between the client and the original server. In order to obtain content from the original server, the client sends a request to the proxy and specifies the target (the original server), and then the proxy delivers the request to the original server and returns the obtained content to the client. The client can use ...

keepalived overview The function of Keepalived is to detect the state of the server. If a web server goes down or fails to work, Keepalived will detect it and remove the failed server from the system. At the same time, other servers will be used to replace the server's work. When the server works normally, Keepalived will automatically add the ...

I. descriptionPrometheus collects the data, and Grafana displays the data. The exporters in Prometheus include:1) Node Exporter is responsible for collecting host hardware and operating system data. It will run as a container on all hosts.2) C advisor is responsible for collecting container data. It will run as a container on all host s.3) Ale ...

brief introduction With the increase of servers and network devices in the computer room, log management and query become a headache for system administrators. Common problems encountered by system administrators are as follows: It is impossible to log in to each server and device to view the log during daily maintenance; The storage space o ...

In the process of studying the desktop cloud, it is found that there is not much difference between the server (private cloud or virtualization) and the application of thin client and the management of the desktop. The final landing may require customized development to meet the needs. In the open source virtualization products, limited to th ...

md5sum, command line view configuration I. verifying file integrity with md5sum Command options   1 2 3 4 5 6 md5sum -b Read in file contents in binary mode -t Read in file content in text mode -c Based on generated md5 Value to verify the existing file -w A warning message is given when the verif ...

Virtual Web host Run multiple Web sites on the same server, each of which is not independentTake up a real computer Types of virtual hosts supported by httpd 1. Domain name based virtual host2. Virtual host based on IP address3. Port based virtual host Demonstration of examples Domain name based virtual host Step 1: environment deployment 1. I ...