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Reprinted from: theory The kernel in version 3.6 removes the route cache before FIB query and replaces the next hop cache, which is Past and present life of routing cache It's already said in. This article is about another concept introduced in this version: FIB Nexthop Exception, which is used to record the exceptions of the next hop. What's t ...

Author: Zhang WeiMember of DBA team of aikesheng Beijing Branch, responsible for MySQL daily problem handling and DMP product maintenance. Love technology and open source database, sports, reading, movies, flowers and trees.Source: original contribution*It is produced by aikesheng open source community. The original content cannot be used witho ...

Add monitoring variable Interface: UA_Client_MonitoredItems_createDataChangesuse: Add two UAS to the server_ Uint32 type variable node, the Answer and myself #include "open62541.h" UA_Boolean running = true; UA_NodeId addTheAnswerVariable(UA_Server *server) { /* Define the attribute of the myInteger variable node */ UA_VariableAttributes ...

Typical usage scenarios of ZookeeperZookeeper distributed lock practiceZookeeper distributed locking principleIn the above implementation, when the concurrency problem is serious, the performance will decline sharply. The main reason is that all connections are listening to the same node. When the server detects a deletion event, it should noti ...

Arrays and linked lists Array features 1. Continuous: sequential storage. 2. Fixed length: once defined, the length cannot be changed. 3. According to the subscript, you can directly access the elements of this subscript. 4. It is not suitable for inserting, deleting and other operations. In python, the list is a dynamic array Linked li ...

MySQL installation using yum   MariaDB is installed by default in CentOS7, which is a branch of MySQL. However, MySQL should be installed in the system for the sake of needs, and MariaDB can be directly overwritten after installation. 1. Download and install the official MySQL} Yum Repository [root@BrianZhu /]# wget -i -c http://dev.mysql.co ...

Digital watermarking based on wavelet filter transform, Heisenberg decomposition and singular value decomposition (MATLAB) brief introduction Digital watermarking refers to embedding specific information into digital signals, which may be audio, picture or video. If you want to copy the signal with digital watermark, the embedded information wi ...

This section mainly introduces compiling and verifying secondary development results. compile Compilation environment requirements Operating environment requirements The operating system environment requirements are shown in the table below. CPU Operating system requirements X86 architecture Cent ...

Graphic verification code recognition technologyHinder our reptiles. Sometimes it is the graphic verification code when logging in or requesting some data. So here we explain a technology that can translate pictures into words. Translating pictures into words is generally called Optical Character Recognition, abbreviated as OCR. There are not m ...

catalogue 1. Basic concept of Hassi Watch Bihasi function 2.1 direct setting method 2.2 division and remainder method 2.3 several less commonly used methods III. Hassi conflict Four open address method 4.1 linear detection 4.2 secondary detection Five zipper method 1. Basic concept of Hassi Watch Hash table (Hash tabl ...