March 2008 Web Server Survey

2008年3月的调查显示,全球共有1亿6千2百多万个活跃网站,比上个月增加了450万个。Google、MySpace等社交平台继续增长,但活跃站点数因隐私设置有所下降。轻量级服务器LiteSpeed的增长速度也非常快。
In the March 2008 survey, we received responses from 162,662,052 sites. Growth has continued to rise over the past few months, with this month seeing a gain of four and a half million new sites.

The largest changes this month are once again seen amongst the blogging and social network providers. Google increases its developer share by gaining 842 thousand hostnames; most of which are used for blogspot.com blogs. Although MySpace gained nearly 200 thousand hostnames this month, the total number of active sites fell noticeably after many more users marked their profiles as private.

Apple has recently started hosting sites created with their own iWeb program. iWeb is a template-based web page creation tool, and the latest version is included with Apple's iLife package. The majority — more than 24 thousand — of these iWeb sites are being served from a single IP address, using the new AppleDotMacServer-1B5626 web server.

While Google is the largest developer to gain share this month, the LiteSpeed web server continues to show very rapid growth on the internet — growing by more than a quarter this month — and is now serving 605 thousand websites around the world.

Total Sites Across All Domains August 1995 - March 2008

 

Total Sites Across All Domains, August 1995 - March 2008

Market Share for Top Servers Across All Domains August 1995 - March 2008

 

Graph of market share for top servers across all domains, August 1995 - March 2008

Top Developers
DeveloperFebruary 2008PercentMarch 2008PercentChange
Apache80,580,18350.93%82,454,41550.69%-0.24
Microsoft56,265,52735.56%57,698,50335.47%-0.09
Google8,169,9305.16%9,012,0045.54%0.38
lighttpd1,565,5360.99%1,552,6500.95%-0.04
Sun547,5100.35%546,5810.34%-0.01
DeveloperFebruary 2008PercentMarch 2008PercentChange
Apache32,666,67048.73%33,011,74049.38%0.65
Microsoft24,099,34735.95%23,533,80135.20%-0.75
Google5,686,9798.48%5,571,3118.33%-0.15
Sun180,3920.27%172,2180.26%-0.01
lighttpd103,4040.15%77,4830.12%-0.04
Totals for Active Servers Across All Domains
June 2000 - March 2008


A more detailed list of servers is given here.

TOP 10

 

VendorProductWeb Sites
ApacheApache82,083,768
MicrosoftIIS57,692,890
GoogleGFE9,008,750
UnknownUnknown3,281,088
OverseeOversee1,850,130
lighttpdlighttpd1,552,650
OtherOther1,112,902
nginxnginx954,122
LiteSpeedLiteSpeed604,925
ZeusZeus484,562

nginx的数据量和lighttpd明显缩小阿,赫赫。

带开环升压转换器和逆变器的太阳能光伏系统 太阳能光伏系统驱动开环升压转换器和SPWM逆变器提供波形稳定、设计简单的交流电的模型 Simulink模型展示了一个完整的基于太阳能光伏的直流到交流电力转换系统,该系统由简单、透明、易于理解的模块构建而成。该系统从配置为提供真实直流输出电压的光伏阵列开始,然后由开环DC-DC升压转换器进行处理。升压转换器将光伏电压提高到适合为单相全桥逆变器供电的稳定直流链路电平。 逆变器使用正弦PWM(SPWM)开关来产生干净的交流输出波形,使该模型成为研究直流-交流转换基本操作的理想选择。该设计避免了闭环和MPPT的复杂性,使用户能够专注于光伏接口、升压转换和逆变器开关的核心概念。 此模型包含的主要功能: •太阳能光伏阵列在标准条件下产生~200V电压 •具有固定占空比操作的开环升压转换器 •直流链路电容器,用于平滑和稳定转换器输出 •单相全桥SPWM逆变器 •交流负载,用于观察实际输出行为 •显示光伏电压、升压输出、直流链路电压、逆变器交流波形和负载电流的组织良好的范围 •完全可编辑的结构,适合分析、实验和扩展 该模型旨在为太阳能直流-交流转换提供一个干净高效的仿真框架。布局简单明了,允许用户快速了解信号流,检查各个阶段,并根据需要修改参数。 系统架构有意保持模块化,因此可以轻松扩展,例如通过添加MPPT、动态负载行为、闭环升压控制或并网逆变器概念。该模型为进一步开发或整合到更大的可再生能源模拟中奠定了坚实的基础。
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