[Spark] 读取MySQL大Table的效能问题

在测试从 Spark Shell读取MySQL一张Large Table时,发生了Out of memory和connection timeout问题,记录一下处理的过程: MySQL Table资料笔数:1400万笔左右 Spark Cluster配置
What does partition mean?

**What is a partition? ** Partitioning is the operation done to your hard drive and turns hard drive into multiple sectors. Hard drive is just like a library which has different areas to store differen
批次档自动安装软体

@echo off ECHO ============================================================================= ECHO ============================================================================= echo 软体正在安装中
[转贴分享资讯] Petya 病毒全球爆发中 ! 比 WannaCry 强 电脑更新过也中招 : Wind

这篇是我看过最详细的解说,备而不用希望大家用不到。 转贴如有不妥请小财神删除。 https://unwire.hk/2017/06/28/petya/tech-secure/
MBR VS GPT

This page introduces two difference partition plans: MBR and GPT and how to choose partition plans correctly. Besides, this guide touches upon basic knowledge about BOIS and EFI and gives samples about
C++读取bmp图档

纯灌水,不要理我 fstream file;int x = 0,y = 0; WORD bmpId;IBYTE fileSize;WORD bmpReserved1;WORD bmpReserved2;IBYTE bmpOffset;IBYTE bmpInfoHeaderSize;IWORD bmpWidth;IWORD bmpHeight;WORD bmpPlane
Ch.1 认识windows server

初次接触 Windows Server,此为一边看书一边整理的笔记,参考书籍为:(1) 旗标出版的Mircrosoft Windows Server 2008 系统实务 (2) 碁峯出版的Windows Server 2012系统建置
建立与管理AD帐户

新增AD帐户 安装AD网域服务后,预设会有以下五种容器: Builtin:存放内建群组,如:Administrators, Account Operators, Guests, UsersComputers:存放网域内的电脑帐户,
SMTP 实例

简单邮件传输协定 (Simple Mail Transfer Protocol, SMTP) 是在Internet传输email的标準。 SMTP是一个相对简单的基于文字的协定。在其之上指定了一条讯息的一个或多个
pfsense free dynamic dns ubddns configure

pfsense free dynamic dns ubddns configure 透过 http updata 我们以图说明 当然是要在 uddns.org 先申请 其他只要透过 http updata 语法就可以了 https://www.ublink.org 免费的ddn