. Net Performance Test and optimization 3 load balancing, IIS, HTTP Optimization

Load Balancing

In a high-load system, a single server generally fails to meet the requirements. In this case, the session status issue needs to be solved when multiple servers are distributed to the Server Load balancer.

The following are some references:

SessionstateConfigurationHttp://blog.csdn.net/nihongyuan/archive/2009/04/30/4139928.aspx

ASP. NETApplication-basedSessionstateOf"Status programming framework"Solution Http://www.cnblogs.com/artech/archive/2010/10/31/State_Management.html

IIS Problems

The version of IIS, 6 and 7, has changed a lot.

HTTP Compression

Static content settings: it is better to apply static content to other dedicated web servers.

HTTP header settings:

Cache-control, expires etag

Reverse Proxy

Open-source squid as reverse proxy

Iis7 www.iis.net/expand/applicationrequestrouting

CDN

Microsoft provides a CDN to serve the standard Ajax JavaScript libraries including www.asp.net/ajaxlibrary/cdn.ashx

HTTP Optimization

The following tools are useful for Web Client optimization and performance problems:

Firebug http://getfirebug.com/

Fiddler http://www.fiddlertool.com

YslowHttp://developer.yahoo.com/yslow/

Internet Explorer Dev ToolbarIE8Built-in

TIPS:

• Make all of your static files as small as possible on the wire.

• Reduce your page sizes and compress whatever you can.

• Optimize your JavaScript and CSS and use HTTP efficiently.

• Analyze your site with yslow.

• Use firebug's net analysis to discover your page processing profile.

• Look at content expiration and compression.

• Profile your JavaScript-rich pages first.

• Compress your images as much as possible.

• Use CSS Sprites.

• Look for 404 errors.

• Remove white space and comments.