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Presto、Spark SQL、Hive的比较
Presto、Spark SQL、Hive的比较 1.Presto Presto只有计算分析能力但可以连接多种数据源,包括Hive,Oracle,MySQL,Kafka,MongoDB,Redis等,并且可以将多个不同数据源进行联合分析。可以通过show catalogs 命令看到Presto连接的所有数据源。 Presto是一个低延迟高并发的内存计算引擎,相比Hive,mybatis-plus
官网 MyBatis-Plus (opens new window)(简称 MP)是一个 MyBatis (opens new window)的增强工具,在 MyBatis 的基础上只做增强不做改变,为简化开发、提高效率而生。 一 快速入门 1.1 建库我所使用的生产 Java 17 启动参数
JVM 参数升级提示工具:jacoline.dev/inspect JVM 参数词典:chriswhocodes.com Revolut(英国支付巨头)升级 Java 17 实战:https://www.bilibili.com/video/bv1SA4y1d7sZ 目前正常微服务综合内存占用+延迟+吞吐量,还是 G1 更优秀。但是如果你的微服务本身压力没到机器极限,要求延迟低,那么如何使用 Serverless Devs 部署静态网站到函数计算(上)
简介:部署个静态网站到函数计算~ 前言 公司经常有一些网站需要发布上线,对比了几款不同的产品后,决定使用阿里云的函数计算(FC)来托管构建出来的静态网站。 FC 弹性实例自带的500 Mb 存储空间对静态网站来说简直是太充足了 。 函数计算资源使用:资源使用限制 - 函数计算 - 阿里云uniapp template和block标签 条件渲染 列表渲染
template和block标签 uni-app 支持在 template 模板中嵌套 <template/> 和 <block/>, 用来进行 列表渲染 (opens new window)和 条件渲染 (opens new window)。 <template/> 和 <block/> 并不是一个组件,它们仅仅是一个包装元素,不会在页面中做任何渲染,只接受控制属性。可以说java11模块化springboot集成j2cache笔记
说明 最近学习了模块化,后面工作可能用到,使用springboot写了一个简单的demo 版本说明 springboot 2.6.1 mysql 8.0 redis 6 j2cache 2.8 mybatis-plus 3.4.3.4 遇到的问题 多个模块有相同的导入 Error occurred during initialization of boot layer java.lang.module.ResolutJava9 以上反射报错
Java9 以上反射报错 问题解决 问题 在写javaFx的时候,进行http请求数据库登录操作,要将返回的json字符串转化类对象,下面代码一直报错。 // json字符串转类对象 JavaType javaType; ResponseBean<T> data = new ObjectMapper().readValue(json, javaType); 报了如SkyWalking在JAVA9及以上版本运行时报错module java.base does not "opens java.lang" to unnamed module
SkyWalking在JAVA9及以上版本运行时报错module java.base does not "opens java.lang" to unnamed module 添加 java --add-opens java.base/java.lang=ALL-UNNAMED # webappService.bat set _EXECJAVA=java --add-opens java.base/java.lang=ALL-UNNAMED -Xms256M #oapService.如何在Linux下建立包含lua vm的unit test framwork
0 引言 lua是一种语法极为灵活、扩展性极强的“胶水语言”, 在使用lua/lua capi时常常会写出一些容易出错的code. 因此,有必要建立以lua vm为基础的unit test帮助程序员及早地发现bug,提高代码的质量。为此,有三件事情需要做。 1 编译配置googletest/googlemock环境 https://stackover2020-03 前端技术汇总
2020/03/30 周一 #JSON数据转Blob后,怎么还原 在axios请求下载文件接口时,一般设置responseType: ‘blob’,文件返回正常就没问题,但后台如果处理文件或鉴权有问题,接口返回了包含错误信息的json格式数据,那样json数据也会转为Blob对象,而前端有必要将错误信息展示的,那怎么将Blob数gitee博客搭建
使用代码托管平台搭建个人博客网站 0基本思路 1.使用本地的文档编辑形式 markdown 这里推荐使用markdown 2.使用hexo工具转换为网页文档(依赖于node.js) 3.使用代码托管平台,使用page服务,将网页进行展示 1.本地安装 安装hexo npm install hexo -g 使用node.js将hexo下载并添加至环Docker
(一)什么是 Docker Docker 最初是 dotCloud 公司创始人 Solomon Hykes 在法国期间发起的一个公司内部项目,它是基于 dotCloud 公司多年云服务技术的一次革新,并于 2013 年 3 月以 Apache 2.0 授权协议开源 (opens new window),主要项目代码在 GitHub (opens new window)上进行Windows 10 Shell命令
貌似不能在cmd中使用,只能用在run ? “ shell:AccountPictures” 注:此命令访问Windows 10设备中的帐户图片文件夹。 “ shell:AddNewProgramsFolder” 注:添加一个新的程序文件夹。 “ shell:Administrative Tools” 注:访问管理工具文件夹。 “ shell:AppData” 注:访问WindowsUsing Cisco Mini USB Console Cable to Configure Cisco Switches and Routers
Cisco Device Mini USB Port Cisco has added mini usb port into their products for many years. The key to use this port is to get a right cable. At most situations we are using regular RJ45 console port with a USB to Serial Adapter connecting to your coAdd static route in Smoothwall
Add static route in Smoothwall Firstly, edit the file /etc/rc.d/rc.netaddress.up Above the 'echo "setting up firewall ……."', add: /sbin route add -net destination netmask subnetmask gw gateway devdeviceinterface ————————————Checkpoint Domain Object
Was thinking to use Domain Object as a source in our firewall rule. After consulted with checkpoint support, it seems impossible if your domain object represented multiple ip addresses. SK42128 Symptoms Rules containing a Domain object will onno response when ping MS Cluster’s ip address – Solution
There is a Citrix cluster deployed in our environment. But cluster ip not working from an outside network, although working fine in same network. Checked MS doc – http://technet.microsoft.com/en-us/library/cc732592(WS.10).aspx troubleshooting NLB, fSecureXL Vs CoreXL Vs ClusterXL (Some Checkpoint Terms)
From Checkpoint Sites: “SecureXL: Security acceleration Patented SecureXL is a technology interface that accelerates multiple, intensive security operations, including operations that are carried out by Check Point’s Stateful Inspection firewall. UsiSteps to Set up Juniper Secure Access (SA) / SSL Virtual Appliance
This products looks similar as UAC products. http://www.juniper.net/support/products/sa/ 1. Download file SPE Virtual Appliance ServiUSB to Serial Cable Driver Issue on Windows 10
I have been using a Usb-to-Serial cable for many years without problem at windows xp and windows 7 system. Just recently upgraded to windows 10 , the cable does not work properly any more. The Prolific USB-to-Serial Comm Port shows not working properly2016 Technology Salary Report (GTA) from Lannick
Established in 1985, Lannick Group has been the GTA’s premier specialized recruitment and staffing firm for more than 30 years and we place more than 700 professionals annually. 2016 Technology Salary Repor is the latest technology report in their inMy Top Network Security Tools
I listed some of my favorite and useful Internet websites and network tools in previous post which has been used in my daily IT life. There are some network security related tools I am using at my environment. This post is a summarize for those tools aFirefox Warning Message -“This Connection is Untrusted” Caused by Proxy Server Certificate
I am getting the “This Connection Is Untrusted” message in Firefox for all security website using https even when I go to the Mozilla support page. Any secure site is viewed as an untrusted connection only in Firefox browser, but IE and Chrome are fin在idea启动服务器时出现这个问题,有大佬知道怎么办嘛?
NOTE: Picked up JDK_JAVA_OPTIONS: --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED Error occurred during initialization of boot layer java.lang.module.FindException