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return of SaltStack component The return component can be understood as the SaltStack system stores or returns the data returned by Minion to other programs. It supports a variety of storage methods, such as MySQL, MongoDB, Redis, Memcache, etc. through return, we can record each operation of SaltStack and provide a data source for future ...

STM32 interrupt, DMA communication principle and programming method example STM32 interrupt, DMA communication principle and programming method example 1 Introduction to interrupt 1.1 concept Interrupt actually means that when the CPU executes a program, due to some random event (external or internal), the CPU temporarily interrupts the ...

Tip: please read through the operation steps, relevant precautions and relevant reference links before operation. Operation is risky. 1, Tool preparation Download ADB environment package platform-tools_r31.0.1-windows tools I use Reference tool link: https://dl.google.com/android/repository/platform-tools_r31.0.1-windows.zip decompression 2, Tu ...

Note: some pictures in this article come from the Internet. If there is infringement, please inform us to delete them 1. What is a process? Before we understand the concept of process, we need to know the concept of program. Program refers to compiled binary files. These files are on disk and do not occupy system resources. Process refers to th ...

Stack space          Stack space is expanded from high address to low address, and heap address is expanded from low address to high address.          Stack is a data structure with certain rules. We can add and delete data according to certain rules. It uses th ...

react is a framework for building user pages, which consists of four major parts: react: core library,React dom: dom operation (using jsx to operate dom elements)React Router: route (similar to vueRouter)redux: centralized state management (similar to vuex) react features: 1) Declarative creates user pages in a form similar to writing html ta ...

Blind injection, as the name suggests, means that the return value can not be seen directly during injection, but we can judge it by other methods: next, I will introduce error echo, time blind injection and Boolean blind injection one by one. Blind injection is divided into three categories: reference resources: like 'ro%' # judge whe ...

In many scenarios, the zookeeper cluster is used. For example, it uses its consistency ability and node monitoring ability to realize a variety of business functions.The problem encountered this time is that the zookeeper disk util is too high.First view the await index and util index of the disk through iostat, as shown in the following figure ...

Title Link: SP6779 GSS7 - Can you answer these queries VII General meaning Given a tree with n n A tree with n nodes, each node has a weight w i ( ...

1. Visibility between threads Multithreading improves efficiency and caches data locally, making data modification invisible, To ensure visibility, either trigger synchronization instructions or add volatile modified memory. As long as there are modifications, synchronize each thread involved immediately /** * volatile Keyword to make a var ...