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1, Introduction to SecondaryNameNode When analyzing the edits log files just now, we have introduced the SecondaryNameNode. Here is a summary to show our attention. The secondary namenode is mainly responsible for regularly merging the contents of the edits file into the fsimage This merge operation is called checkpoint. When merging, the co ...

Use of FactoryBean FactoryBean FactoryBean is an interface. The interface declaration is as follows: package org.springframework.beans.factory; import org.springframework.lang.Nullable; public interface FactoryBean<T> { String OBJECT_TYPE_ATTRIBUTE = "factoryBeanObjectType"; @Nullable T getObject() throws Exception; ...

1,IOC Inverse of Control – IOC, control reversal, reversing the control of the object to Spring! Using IOC can solve the problem of high coupling of programs Control reversal Suppose I need a function. In this function, I need to call the service layer, and then call the dao layer to get the data. Traditional Java EE development direc ...

Task1 understand the game questions I learning syllabus ● overview of competition questions ● data overview ● prediction index ● analyze competition questions II Learning content 1. Overview of competition questions The competition requires contestants to establish models and predict financial risks according to the given data set. (1) Th ...

day09 [thread status, wait and wake-up, Lambda expression, Stream flow] Today's content Multithreading Thread status -------- -- > must be masteredWaiting for wake-up mechanism -------- must be mastered Lambda expression Usage scenarios of Lambda expressions -------- -- > it is recommended to masterFormat of Lambda expression (sta ...

Original address: Explain ModuleList and Sequential in PyTorch in detail torch.nn.Module() import torch.nn as nn import torch.nn.functional as F class Model(nn.Module): def __init__(self): super(Model, self).__init__() self.conv1 = nn.Conv2d(3, 32, 3) self.conv2 = nn.Conv2d(32, 10, 1) def forward(self, x): x = F.relu(self.conv1( ...

Basic introduction and advanced series of articles on Android development are being released and shared with you. Interested partners can follow bloggers! Explore and learn Android technology together to help you fight on the road of programming! catalogue 1, RadioButton radio box 2, CheckBox check box 3, Spinner drop-down box 4, ListVie ...

Advanced python has been greatly optimized on the basis of the first phase, making the whole more beautiful and easy to understand 7, List 7.1 common operations of list 7.1.1 search a,-----.statswith() . statswitch(): judge whether the string starts with a substring, put the substring in parentheses, and the results are Boolean types Tr ...

Set 55: In a given program, the function of the function fun is to judge whether the string referred to by the formal parameter s is a palindrome. If so, the return value of the function is 1; No, the return value of the function is 0. "Palindrome" is a string with the same forward and reverse reading (case insensitive). For example, ...

A small event describes concurrency, parallelism, synchronization, asynchrony, threading and multithreading An exhibition invitation was launched to eight companies during a Canton Fair, There are 8 participating companies, and the venue has an exhibition area of 800000 square meters, Each exhibitor has 100000 square meters for sale, Each exhi ...