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The purpose of this chapter is to use NFS shared storage space and build HTTPD services to use this space. This chapter environment: VM virtual machine, a server Centos7 as a server to provide NFS services, a server Centos7-1 as a client 1. Add a hard disk to the server (restart the server disk is valid) 2. Check whether the disk is in effec ...

DR (Direct Routing) is one of the three load balancing modes and is also one of the most used. For an introduction to this mode, you can refer to the blog: https://blog.51cto.com/14227204/2436891The environment is as follows:1. All web nodes and schedulers are configured with VIP: when clients access VIP (virtual IP address of the cluster), if ...

Project Background: Considering many problems such as high reliability, there may be multiple architectures in public or private clouds, such as two places, three centers and so on. Requirements in different regions of the instance node through the same domain name resolution to local A records or cloud products CNAME, and achieve high reliabil ...

Original Link: https://my.oschina.net/u/168138/blog/1838207 MongoDB Replica Set Configuration and Data Migration Actual https://gitee.com/et/ops/blob/master/MongoDB Replica Set Config ...

For a detailed description of the basic configuration of LVS, please refer to the blog: https://blog.51cto.com/14227204/2436891Case environment:The results are as follows: Using the cluster technology of NAT mode, LVS load dispatcher is the gateway server for all nodes to access the Internet, and its 200.0.0.1 is also the VIP address of the w ...

Catalog   Preface 1. What is a windowing function 2. Window-opening function syntax 3. Classification of window-opening functions 4. Cumulative Statistics Window Opening Function 4.1 Cumulative sum(xx) over 4.2 Cumulative Average avg(xx) ...

Overview of Separation Resolution: Separate Resolution Domain Name Server is actually the primary domain name server. Separate Resolution mainly refers to providing different domain name resolution records according to different clients.When clients from different addresses request to resolve the same domain name, they are provided with differ ...

Today, we found a new vulnerability in Aliyun's Cloud Security Center, which is called "fastjson < 1.2.60 Remote Denial of Service vulnerability". Generally speaking, if fastjson version is not updated, attackers may exploit the vulnerab ...

Role of DNS systems The role of the DNS system in the network is to maintain an address database, which records the relationship between various host domain names and IP addresses in order to provide forward or reverse address query services to clients. Forward Resolution: Find the corresponding IP address based on the host name (domain name) ...

Enterprise-level database applications are mostly deployed on RAID disk array servers, which can improve disk access performance and achieve fault tolerance/disaster tolerance.RAID (Redundant Disk Array), simply understood, is to take some inexpensive hard disks to make an array. Its purpose is to expand storage capacity, improve read and writ ...