Programming VIP

During the operation of DM MPP system, if an EP node fails and stops, the whole MPP system will be in a state of abnormal service. All current user sessions will be disconnected by the system. Global login is not allowed, but local login is only allowed. Therefore, in order to ensure the high availability of MPP system, it is strongly recommend ...

1, Java Web 1.Web development web: web pages, such as https://www.baidu.com (1) Static web: the data and pages provided will never change; Technology stack: html, css (2) Dynamic web: the data and pages provided will always change; Technology stack: Jsp, servlet, ASP, PHP Almost all websites are dynamic web, such as Taobao. 2.web applicati ...

1: Background Recently, we are doing service docking with a third party. The third party needs to call our service interface to query data. For the exposed interface, security is very important, so we must add a signature when doing interface verification, which can effectively protect our interface security 2: Encryption It is impossible to ...

HA - Keepalived Principle analysis ** 💯 Introduction: * * kepplived high availability technology prevents the inevitable impact of a single point of failure of the service and enhances the high availability and security of the service. For example, the failure of middleware rabbitmq, mysql, mycat, Haproxy and other servers will affect the ...

1, Introduction Tomcat server is a free open source Web application server, which is a lightweight application server, It is widely used in small and medium-sized systems and not many concurrent access users. It is the first choice for developing and debugging JSP programs. For a beginner, you can think that when you configure Apache ser ...

First, we need to analyze the problem. To implement a Git remote warehouse server, we need to know: How to configure Git server side.How to connect to a remote warehouse.How to push, pull, fetch and other operations from the remote warehouse. After the analysis, it is found that it is quite simple. Let's go step by step. The first is the conf ...

@TOC Vsftpd is a relatively stable FTP service software. The FTP service provided by vsftpd can be flexibly configured as anonymous access, local user access and virtual user access according to specific business needs. Among them, the most secure is the virtual user access mode. This paper builds and configures an FTP server for virtual user a ...

catalogue 1. Router redistribution and configuration 1.1 route redistribution Redistribute static route and default route in 1.2 OSPF Protocol 2. Virtual link and its configuration 2.1 virtual link overview 2.1 application occasions and functions of virtual link 2.2 virtual link command 2.3 rules and characteristics of configuring vir ...

Finding a virtual address by traversing the page table and mapping the corresponding physical memory is a very common operation, so the whole walk traversal process should take as little time as possible. show_pte() With show_ The PTE () function is taken as an example to illustrate how to obtain the physical page conversion process according ...

backup elabel Command function The backup elabel command is used to back up the electronic label information of the device to the storage medium of the device.The backup elabel ftp command is used to back up the electronic label information of the device to the specified FTP server.The backup elabel tftp command is used to back up the electro ...