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Linux各个版本的系统安装docker

Ubuntu/Debian删除之前安装的dockerapt-getremovedockerdocker-enginedocker.io安装依赖apt-getinstallapt-transport-httpsca-certificatescurlgnupg2software-properties-common添加信任的...

docker redis警告处理 WARNING Memory overcommit must be enabled; vm.overcommit_memory = 1

提示信息WARNINGMemoryovercommitmustbeenabled!Withoutit,abackgroundsaveorreplicationmayfailunderlowmemorycondition.Beingdisabled,itcanalsocausefailureswithoutlowmemo...

mongo5报错: WARNING: MongoDB 5.0+ requires a CPU with AVX support, and your current system does not appear to have that!

错误提示WARNING:MongoDB5.0+requiresaCPUwithAVXsupport,andyourcurrentsystemdoesnotappeartohavethat!原因mongodb5需要AVX的cpu指定集,当前的cpu太旧或者没有开启.解决办法降低mongodb的版本(使用4.x的版的mon...

国产linux系统安装docker (麒麟和统信)

下载docker二制文件下载地址: https://download.docker.com/linux/static/stable/x86_64/https://mirrors.aliyun.com/docker-ce/linux/static/stable/x86_64/国内其它镜像也可以下载wgethtt...

Windows 7 Service Pack 1 (KB976932)

Windows7ServicePack1(KB976932)https://www.catalog.update.microsoft.com/Search.aspx?q=KB976932...
开发笔记 ·2024-07-04

Nginx在Windows下注册为服务开机自动启动

Windows下开机自启动我们可以借助WindowsServiceWrapper小工具,将Nginx转换为Windows服务,这样就可以在开机时自动启动Nginx了。下载后将该工具放入Nginx的安装目录下,并且将其重命名为nginx-service.exe,在该目录下新建nginx-service.xml文件,写入配...

CountDownLatch是什么?

CountDownLatch是Java中一个同步工具类,用于控制多个线程的执行顺序。它可以让某个线程一直等待,直到其他线程完成各自的操作后再继续执行。CountDownLatch通过一个计数器来实现,计数器的初始值为线程数量,每当一个线程完成任务后,计数器的值就会减1,当计数器的值变为0时,等待的线程就会被唤醒继续执行...
开发笔记 ·2024-03-19

Vue3中的readonly怎么使用

在Vue3中,可以通过readonly函数将一个对象转化为只读的,使其属性成为只读的,无法被修改。使用方法如下:import{readonly}from'vue';constmyObject={name:'Alice',age:25};constreadonlyObject=readonly(myObject);//尝...

hadoop中combiner是什么

Combiner(合并器)在Hadoop中,Combiner(合并器)是一个可选的阶段,用于优化MapReduce任务的性能。它是在Map阶段输出之后、规约(reduction)之前执行的。Combiner的作用是在Map任务的本地节点上对Map阶段的输出进行局部聚合。它接收Map任务输出的键值对,并将具有相同键的键值...
开发笔记 ·2024-01-23

CSS3 text-shadow 属性

 基本文字阴影(text-shadow):h1{text-shadow:2px2px#ff0000;}在此页底部有更多的例子。表格中的数字表示支持该属性的第一个浏览器版本号。属性     text-shadow4.010.03.54.09.6text-shad...
开发笔记 ·2023-12-03

ORA-39034: Table string does not exist.

文档解释ORA-39034:Tablestringdoesnotexist.Cause:TheuserreferencedatableinanAPIthatdidnotexist.Action:CorrecttablenameandretryAPI.ORA-39034:Tablestringdoesnotexist.这...

ORA-31181: PL/SQL DOM handle accesses node that is no longer available

文档解释ORA-31181:PL/SQLDOMhandleaccessesnodethatisnolongeravailableCause:Thespecifiedpl/sqlhandleisreferencinganodeinaDOMDocumentthatisnolongeravailable.Action:Ens...
IT技术学习 ·2023-07-28

ORA-42028: materialized view log “string”.”string” does not exist

文档解释ORA-42028:materializedviewlog“string”.”string”doesnotexistCause:Anattemptwasmadetoregisteranonexistentmaterializedviewlogasadependen...

ORA-24167: incompatible rule engine objects, cannot downgrade

文档解释ORA-24167:incompatibleruleengineobjects,cannotdowngradeCause:thereareruleengineobjectsinthedatabasethatcannotbedowngraded.Action:checkutlincmp.sqlandremovea...

ORA-24404: connection pool does not exist

文档解释ORA-24404:connectionpooldoesnotexistCause:Anattemptwasmadetousetheconnectionpoolbeforecreatingit.Action:Createtheconnectionpool.ORA-24404:连接池不存在官方解释ORA-2440...
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