Programmer Think

1. Host Planning   Pillar document https://docs.saltstack.com/en/latest/topics/pillar/index.html   Matters needing attention If the master or minion configuration file is modified, the corresponding service must be restarted.   2. Grains VS Pillar   3. Pillar Basic Information 1 Pillar 2 Pillar data is the dynamic as ...

18.1 Cluster Introduction Linux clusters are divided into two main categories based on their functions: high availability and load balancing High Availability Clusters usually consist of two servers, one working and the other serving as redundancy, which will continue to serve when the serving machine goes down. * Open source software for hi ...

1. Default Virtual Host Modify configuration files vim /usr/local/nginx/conf/nginx.conf Add "include vhost/*.conf;" in the last penultimate line (all files ending with. conf under vhost will be loaded so that all virtual host configuration files can be placed in the vhost directory)   Create vhost, edit configu ...

Network configuration under linux 1. What is IP ADDRESS internet protocol ADDRESS ##Network process address ipv4 internet protocol version 4 ip It consists of 32 0,1. 11111110.11111110.11111110.11111110=254.254.254.254 2. Subnet mask Used to divide the network area The digital bits on the ip corresponding to the non-ze ...

In order to understand a large number of concurrent visits in large websites, it is far from enough to achieve distributed load balancing in websites. To the data business layer and data access layer, if the traditional data structure is still used, or only one server is used to handle so many database connection operations, th ...

Operation modes and symbols: Operational Symbolic Meaning (*Common for Marking) +, -addition, subtraction *, /,%Multiplication, Division, Remaining **Power operation ++, --self-increasing, self-decreasing <,<=,>,>=Comparison Symbol =, +=, -=, *=, /=,%=assignment For example, a+=1 equals a=a+1 Common operatio ...