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由于现在hadoop2.0还处于beta版本，在apache官方网站上发布的beta版本中只有编译好的32bit可用，如果你直接下载安装在64bit的linux系统的机器上，运行会报一个INFO util.NativeCodeLoader - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable的错误，但在实际测试中是可以正常安装并可以运行自带的wordcont例子，所以这个错误不会导致hadoop2.1.0的安装和运行失败，此错误引起原因是由于 阅读全文
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Understanding and configuring the physical connections of a host in a CloudStack deployment can at first be very confusing. While Software Defined Networking (SDN) is set to greatly simplify some aspects, its integration within CloudStack is not fully mature yet and it won’t be the right solution fo 阅读全文
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Cloud computing can broadly be broken down into three main categories based on the deployment model. Here is a definition of each one, courtesy of Wikipedia:Public CloudPublic cloud applications, storage, and other resources are made available to the general public by a service provider. These servi 阅读全文
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十一月，红帽公司推出Red Hat Enterprise Linux OpenStack Platform 4.0测试版，这款企业级解决方案集Red Hat Enterprise Linux的稳定性与Red Hat OpenStack技术内在的创新性于一体，为构建开放的私有云或公有云提供一个可扩展的、安全的基础。今天，Red Hat Enterprise Linux OpenStack Platform 4.0全面上市。使用红帽强化的OpenStack Havana代码构建的Red Hat Enterprise Linux 6.5，以及建立在KVM基础上的红帽企业级虚拟化管理程序，Red Ha 阅读全文
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http://shapeblue.com/ 阅读全文
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OpenStack APIBlock Storage Service API Compute API Compute API extensions Identity Service API and extensions Image Service API Networking API and extensions Object Storage API Orchestration API Telemetry APICloudStack API Network Load Balancer Virtual Machine AutoScale VPN VPC Host Usage Account Vo 阅读全文
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What are programs?The OpenStack project mission isto produce the ubiquitous Open Source Cloud Computing platform that will meet the needs of public and private clouds regardless of size, by being simple to implement and massively scalable.OpenStack Programsare efforts which are essential to the comp 阅读全文
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环境：Linux操作语句：[oracle@ora11r2 ~]$ sqlplus /nologSQL*Plus: Release 11.1.0.6.0 - Production on Thu Jun 10 18:22:16 2010Copyright (c) 1982, 2007, Oracle. All rights reserved.SQL> startupORA-01031: insufficient privilegesSQL> quit[oracle@ora11r2 ~]$ sqlplus / as sysdba --得用dba登录才行，汗。。。。。SQL*Plus: R 阅读全文