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catalogue 1, MySQL master-slave replication 1. Principle of master-slave replication 1. Replication types supported by MySQL 2. Working principle of MySQL master-slave replication 3.MySOL master-slave replication delay 4. Role of replication 2. Specific operation 1. Main server 192.168.68.200 2. From server 192.168.68.30 3. From serve ...

preface: I shared an article before Linux development coredump file analysis and actual combat sharing Today, let's share a practical article. In our embedded linux development process, we often use multi process and multi thread development. In the process of multithreading, we may encounter that a thread occupies cpu for a long time, resulti ...

LVS Article catalogDocker builds a simple LVS - dz45693 - blog Park (cnblogs.com) Linux Virtual Server, Linux Virtual Server, mainly realizes soft load scheduling 1, Introduction 1.1 three working modes of LVS NAT - network address translation NAT (Network Address Translation) refers to Network Address Translation. The requested data p ...

catalogue Linux Mysql advanced statement 1, SQL advanced statement Import file to database  select   distinct  where   And and   Or or  in  between   like wildcard  order by    function   Aggregate function replace  concat  substr  group by  having   alias   join query   inner join ...

The completion quantity is designed based on the waiting queue, so it is obviously impossible to use the completion quantity in the interrupt context. struct completion { unsigned int done; wait_queue_head_t wait; }; Let's take a classic example of using completion quantity: struct kthread_create_info { /* Information passed to k ...

1, Process communication foundation 1. What is process communication A process is an independent resource allocation unit. Resources between different processes (processes mentioned here usually refer to user processes) are independent and have no association. Resources of another process cannot be accessed directly in one process. However, pro ...

preface After we purchase a ECs, we usually need to install some common software. This article will introduce the common installation methods and configurations of some softwareBefore installing the software, we need to do some preparatory workFirst, check whether the yum source is available. If the following figure appears, it indicates ...

Preface Not long ago, I published a post about TLS protocol configuration that I have drilled through. After verification by a third-party partner, there are unsafe Suites for this TLS protocol and we need to solve them quickly, so we will start to work on this article! Third-party partners are demanding on platform security, and we have issued ...

1. Install ansible package [root@centos8 ~]yum -y install ansible 2. Modify profile ###Purpose: to cancel the error (yes/no) that occurs every time you connect to the remote host [root@centos8 ~]#vim /etc/ssh/ssh_config #Modify the following line StrictHostKeyChecking no perhaps [root@centos8 ~]#vim /etc/ansible/ansible.cfg Uncomment the ...

Introduction to mail system The e-mail system completes the transmission of e-mail based on the e-mail protocol. The common E-mail protocols are as follows 1. Simple Mail Transfer Protocol (SMTP): it is used to send and relay e-mail, occupying 25/TCP port of the server 2. Post office protocol version 3 (POP3): used to store e-mail to the ...