前段时间陆续发布了一些对公有云服务性能评测的数据。经常有同行问我怎么样去做这些性能评测。其实这些性能评测都很简单，任何一个具备Linux基础知识的工程师都可以完成。我们通常使用UnixBench来评估虚拟机CPU性能，mbw来评估内存性能，iozone来评估文件IO性能，iperf来评估网络性能，pgbench来评估数据库性能。在这里我将我自己做性能测试的过程整理一下，供各位同行参考。
（0）安装必要的软件
假定VM的操作系统是Ubuntu，可以按照如下步骤安装必要的软件：
sudo apt-get install python-software-properties
sudo add-apt-repository ppa:pitti/postgresql
sudo apt-get update
apt-get install libx11-dev libgl1-mesa-dev libxext-dev perl perl-modules make gcc nfs-...
Reblogged from Technological Musings: The latest release of Eucalyptus has introduced a new user user console. The user console is written in Python and is using the logging module that can easily be setup to work with rsyslog. It even uses it out the box! Unfortunately, the user console is sending a lot of verbose [...]...
The latest release of Eucalyptus has introduced a new user user console. The user console is written in Python and is using the logging module that can easily be setup to work with rsyslog. It even uses it out the box! Unfortunately, the user console is sending a lot of verbose and useless information into /var/messages which I don’t like. /var/log/messages is...
On December 18, 2012, Eucalyptus v3.2 was released. One of the main focuses on this release was to harden the High Availability design of Eucalyptus. I recently have been looking at additional configuration features of DRBD – which is used by Eucalyptus Walrus HA - that can be used in the Enterprise to help add robustness and [...]...
这个帖子是为2011年11月所发布的《Ubuntu 11.04 Server安装配置OpenNebula 3.0》一文的升级版。本教程在Ubuntu 12.04 Server的32位版本和64位版本上都进行过测试。在设备匮乏的情况下，本教程也可以在一台笔记本电脑上完成（在这种情况下，业务内网和管理内网合并成一个网络）。文章中嵌入的图片可能看得不是很清楚，可以点击图片看到清晰大图。
[网络拓扑]
存储设备（可以是FC SAN，可以是磁盘阵列，可以是管理节点上的本地硬盘，也可以是基于MooseFS或者Ceph的分布式文件系统）通过直连管理节点，并挂载为管理节点上的一个目录/srv。
管理节点和计算节点各有两个网卡，其中一个网卡连接业务内网，另外一个网卡连接存储内网。在条件允许的情况下，建议业务内网和存储内网都使用万兆网。在不能全面使用万兆网的情况下，建议管理节点（尤其是管理节点上的存储网络）连接到交换机的万兆网口，...
This is not the blog I wanted to write. I had hoped that today would be the day we would formally launch the EUCA3 certification exam. Most of the time we write blog posts trumpeting our successes or strategic advantages. Today I write to let you know of an unforeseen issue that - while seemingly minor from a company and product standpoint – has, for now, pushed back the EUCA3 certification launch.
Early last week it was discovered that while it is technically feasible to support two...
The ami2emi project has been moving along. As in, it actually works for a number of cases now. Configure cloud parameters for AWS and Euca, run a script, and boom: your chosen AMIs are brought to life on your Euca cloud. When it works, it Just Works. It’s cool. 
Note that these cases do *not* yet cover configuration of...
Continuous integration: the practice of frequently integrating one’s new or changed code with the existing code repository [wikipedia]
In this blog we will talk about how the continuous integration process was put in place for the new component, Eucalyptus User Console, in order to collaborate the efforts among the dev, QA...
Background I really enjoy OpenLDAP. I think folks really don’t understand the power of OpenLDAP, concerning its robustness (i.e. use multiple back-ends), speed and efficiency. I think its important to have sandboxes to test various technologies. The “cloud” is the best place for this. To test out the latest builds provided by OpenLDAP (via git), [...]...
Reblogged from Coders Like Us: The Eucalyptus User Console can be used standalone, but generally people run Tornado apps (as this is) behind a reverse proxy. There are a few reasons, but most commonly, it is so SSL termination can be handled in one place and several Tornado instances can be managed behind one front [...]...
