- 2024-11-13【缓存策略】你知道 Read Through(读取穿透)这个缓存策略吗?
- 2024-10-29【系统设计】深入理解HTTP缓存机制:从Read-Through缓存到HTTP缓存的交互流程
在现代Web开发中,缓存机制扮演着至关重要的角色。它不仅提升了用户体验,还极大地优化了资源的使用效率。在这篇博文中,我们将从“Read-Through”缓存的概念出发,深入探讨HTTP缓存的工作原理和交互流程,并详细描述max-age、Last-Modified、以及ETag在缓存管理中的重要性。什么是R
- 2024-10-08错误消息:#2002 - Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
错误消息:#2002-Can'tconnecttolocalMySQLserverthroughsocket'/tmp/mysql.sock'(2)原因:数据库服务未启动。连接参数错误。解决方法:检查数据库服务:确认MySQL服务是否正常运行。sudoservicemysqlstatus检查连接参数:确认连接参数(主机名、用
- 2024-09-22Can't connect to local MySQL server through socket
mysql-urootERROR2002(HY000):Can'tconnecttolocalMySQLserverthroughsocket'/tmp/mysql.sock'(2)这是mysql登录时找不到套接字的问题。首先需要明白的是,Linux端的mysqlserver启动时会开启一个socket,Linux上的MySQL的客户端在不使用IP连接时mysqlserver时,默认
- 2024-09-19Can't connect to local MySQL server through socket
mysql-urootERROR2002(HY000):Can'tconnecttolocalMySQLserverthroughsocket'/tmp/mysql.sock'(2)这是mysql登录时找不到套接字的问题。首先需要明白的是,Linux端的mysqlserver启动时会开启一个socket,Linux上的MySQL的客户端在不使用IP连接时mysqlserver时,默认
- 2024-09-15Can't connect to local MySQL server through socket
mysql-urootERROR2002(HY000):Can'tconnecttolocalMySQLserverthroughsocket'/tmp/mysql.sock'(2)这是mysql登录时找不到套接字的问题。首先需要明白的是,Linux端的mysqlserver启动时会开启一个socket,Linux上的MySQL的客户端在不使用IP连接时mysqlserver时,默认
- 2024-08-308.1 CANYONING TECHNIQUE: TRAVERSE LINES
CONTENT8.1TRAVERSELINESLET'SPUTITINCONTEXT:WATCHTHEVIDEOLESSONeBook:TraverseLinesLevel1TRAVERSELINES:IDENTIFICATIONUSINGTRAVERSELINESCLIPPINGTOTRAVERSELINESV7TIP:MAINTAINTENSIONINTERMEDIATEPOINTSPASSINGANINT
- 2024-08-29缓存策略
我们都知道,提高系统性能的最简单也最流行的方法之一其实就是使用缓存。我们引入缓存,相当于对数据进行了复制。每当系统数据更新时,保持缓存和数据源(如MySQL数据库)同步至关重要,当然,这也取决于系统本身的要求,看系统是否允许一定的数据延迟。在这篇文章里,我想给你们介绍最常见的几
- 2024-08-09MySQL数据库迁移到Postgres
一、使用pgloader进行迁移1.安装pgloader:sudoapt-getinstallpgloader2.使用pgloader迁移数据:pgloadermysql://username:password@localhost/source_dbpostgresql://username:password@localhost/destination_dbQ、异常解析Q1KABOOM!FATALerror:Failedtocon
- 2024-07-21ACCT2002 Cost Analysis for Decision Making
ACCT2002CostAnalysisfor Decision MakingTrimester2A,2024SyllabusThisisamanagementaccountingfoundationunitthatsupportsmanagerialplanninganddecisionmakingthroughtheintegrationofethicsandstrategytocostingmodelsandprofitplanni
- 2024-06-23Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through
原因是:Property'sqlSessionFactory'or'sqlSessionTemplate'arerequired,检查一下这两个类是干什么的:SqlSessionFactory是MyBatis的重要对象之一,是创建SqlSession的工厂。SqlSessionTemplate是MyBatis-Spring的核心,是MyBatis为了接入Spring提供的Bean,这个
- 2024-06-21Dragon Boat Festival Revised
ShortTripIwenttoJiujianginJiangxiProvincewithmyroommate.Wedepart!Afteranhouronthemetro,weboardedthetrainasthebeginningofourpleasanttravel.Beautifulsceneryleapedtotheeyesthroughthetrainwindow,whichisoneoftherea
- 2024-06-12Unit 6 - Disappearing Through The Skylight
Unit6-DisappearingThroughTheSkylightDisappearingThroughTheSkylightOsborneBennettHardisonJr.Scienceiscommittedtotheuniversal.Asignofthisisthatthemoresuccessfulasciencebecomes,thebroadertheagreementaboutitsbasicconcept
- 2024-06-03Error creating bean with name 'userController': Unsatisfied dependency expressed through f
SSM整合项目搭建时,项目启动报错,报错内容如下:org.springframework.beans.factory.UnsatisfiedDependencyException:Errorcreatingbeanwithname'userController':Unsatisfieddependencyexpressedthroughfield'userService';nestedexceptionisorg.springfra
- 2024-05-212024-05-21 英语学习纪要
DiamondHeartlyricsHello,sweetgriefIknowyou'llbethedeathofmeFeellikethemorningafterecstasyIamdrowninginanendlessseaHello,oldfriendHere'sthemiserythatknowsnoendSoI'mdoingeverythingIcanTomakesureI
- 2024-05-20当装饰者模式遇上Read Through缓存,一场技术的浪漫邂逅
在《经验之谈:我为什么选择了这样一个激进的缓存大Key治理方案》一文中,我提到在系统中使用的缓存是旁路缓存模式,有读者朋友问,有没有用到过其他的缓存模式,本文将结合一个我曾经工作中的案例,使用装饰者模式实现ReadThrough缓存模式,助你轻松掌握设计模式和缓存。一、缓存模式不说废
- 2024-05-17C122 李超树合并+DP CF932F Escape Through Leaf
视频链接:C122李超树合并+DPCF932FEscapeThroughLeaf_哔哩哔哩_bilibili C65【模板】线段树合并P4556[Vani有约会]雨天的尾巴-董晓-博客园(cnblogs.com)CF932FEscapeThroughLeaf#include<iostream>#include<cstring>#include<algorithm>using
- 2024-04-29Jumping Through Segments
题目:链接:https://www.luogu.com.cn/problem/CF1907D大致思路:二分模拟关键点:①确定二分区间:最小值为第一次跳的左边界,最大值为连续两个线段的最远值(注意,应该有四种情况:左1减右1,左2减右1,左1减右2,左2减右2,取绝对值);②确定如何模拟:递推:假定跳跃长度≤k(mid),那么下一个最远就是ra+
- 2024-04-25mORMot2 定义多对多关系
mORMot2定义多对多关系处理“hasmany”和“hasmanythrough”关系时,主要涉及到的是多对多关系的数据库设计和管理。以下是对您提供的文本的技术性翻译和解释:多对多关系是通过一个专门为这种关系创建的表来追踪的,将这个关系转变为两个指向相反方向的一对多关系。默认情况下,
- 2024-04-20Reflective journal II
(1)Firstofall,Ineedtochooseapeopletopresentate.Then,Ichosesomeaspectsofherandwrotedowndetaileddiscriptionofthese.Atthesametime,Iaskedherwhetherhermindbeingpresentated.Iflippedthroughmyalbumbutcouldnotfindanyphotos
- 2024-03-25Reflective Journal 1
Inthepasttwoweeks,Ihavelearnedtoinfertheemotionsofcharactersfromdetails.Forexample,inthefirstclass,weobservedtheprotagonist'semotionsthroughthedetailsofthevideo"TheNecklace",anddiscoveredherunwillingnes
- 2024-03-24My favourite movie
Myfavouritemovieis"Flipped",directedbyRobReiner.Themoviehasbeenwidelypraisedforitswarmnarrativeanddelicatedepictionofteenages'growth.Hereisananalysisofthefilm'sdetails:Music:Thefilmscorewascompose
- 2024-02-27CF932F Escape Through Leaf【DP,李超线段树】
有一颗\(n\)个节点的树,根节点为\(1\)。每个节点有两个权值,第\(i\)个节点的权值为\(a_i,b_i\)。你可以从一个节点跳到它的子树内任意一个节点上。从节点\(x\)跳到节点\(y\)一次的花费为\(a_x\timesb_y\)。跳跃多次走过一条路径的总费用为每次跳跃的费用之和。求每个节
- 2024-02-18A trip through the Graphics Pipeline 2011: Index
原文地址https://fgiesen.wordpress.com/2011/07/09/a-trip-through-the-graphics-pipeline-2011-index/Welcome.ThisistheindexpageforaseriesofblogpostsI’mcurrentlywritingabouttheD3D/OpenGLgraphicspipelinesasactuallyimplementedbyGPUs.Alot
- 2024-02-11十六、Django的ORM(二)
1、DecimalFieldDecimalField保存浮点型数据比FloatField精确,因为它是以字符串来保存,而FloatField,数据越长,保存得越不精确。2、索引(命中索引)正确使用SQL语言,使查找数据时,用到索引username=models.CharField(...#db_index=True数据库中字段是否可以建立