When data is stored on disk based storage devices, it is stored as blocks of data. These blocks are accessed in their entirety, making them the atomic disk access operation. Disk blocks are structured in much the same way as linked lists; both contai…

Binary Tree : It is a tree data structure in which each node has at most two children. As such there is no relation between a parent and its left and right descendants. Hence they are unordered. Binary Search Tree : These are ordered binary trees wit…

简介参考 TokuMX 和 MongoDB 各自的官方站点.       ##  Tokutek 最重要的特点和 marketing word 是所谓 fractal tree indexing technology,相关链接: 1. 由于 per-node buffer 的引入所导致的 ACID 里的 Durability 问题应对方式(通过更合理的规划物理机器布局.增加单事务数据量等方式来分摊 fsync 开销:更「松弛」的持久化处理,即不要求每次 operation 都做持久化.而是「延迟…

国内用到的EPiServer应该不多,所以记录点用到过的东西,以便分享 1.EPiServer office site http://www.episerver.com/ 2.EPiServer CMS installation. First: download EPiServer CMS from office site and install the cms, after install the cms, you will find the EPiServer Deployment Cent…

01.数据库管理系统(Database Management Systems,DBMS) A database management system (DBMS) is a computer software application that interacts with the user, other applications, and the database itself to capture and analyze data. A general-purpose DBMS is desig…

原文地址:http://www.infoq.com/articles/microframeworks1-spring-boot Spring Boot is a brand new framework from the team at Pivotal, designed to simplify the bootstrapping and development of a new Spring application. The framework takes an opinionated appr…

https://stackoverflow.com/questions/11299217/how-can-i-optimize-this-sql-query-using-indexes --------------------------------------------------------------------------------------------------- Intro: There is a lot to talk about here, and because of…

HashMap的具体学习,认识了解. 前言 也是最近开始面试才发现,HashMap是问的真多.以前听学长或自己在网上看到过一些面试资料都在说集合.线程这块比较重要,面试的重点.自己也是有那抵触情绪,所以自认为这块不重要,但最终发现自己真的太狭隘了,Map这块的知识真的是对数据存储有一个新的认识.但我现在认识尚浅,所以也真的说不出来什么感悟.只能就是对这块来一个简单的入门吧(主要原因还是自己的不注重基础知识的回顾,和一些重点源码的学习,导致时间一长,啥也不知道!). 希望写完这篇随笔可以让自己对这…

原文地址:https://gist.github.com/maxivak/3e3ee1fca32f3949f052 Install Solr download and install Solr from http://lucene.apache.org/solr/. you can access Solr admin from your browser: http://localhost:8983/solr/ use the port number used in installation. M…

This article is from blog of Amazon CTO Werner Vogels. -------------------- Today is a very exciting day as we release Amazon DynamoDB, a fast, highly reliable and cost-effective NoSQL database service designed for internet scale applications. Dynamo…