IIS logs are required to be viewed by every Server Manager, and the server's status and source of IP access are recorded in the IIS logs, so the IIS logs are very important to each server Manager, Seoer is no exception, which also makes it easy for site managers to see how the site operates.
IIS logs are saved in the C:\inetpub\logs\LogFiles\ directory
On IIS, right-click Sites, and in the right-hand window you can see that each site has an ID. Logs for each site are saved under the W3svc+ Site ID folder in the directory above
By default, a log file in the form of U_EXyyyyMMdd. Log is daily in days.
IIS7 under Site log default location
Http://www.cnblogs.com/mincyw/p/3425468.html
Baidu Encyclopedia: IIS Logs
Http://baike.baidu.com/link?url=DKu5BFLSgDFrx2389_-qHR7mBDYaLEtxDsIjHOKJZ2Rfa331wEX3XSKXXpBx-kHdkMWvoaxQbEdBzCG4o4gtBK
IIS Log Analysis tool: Light-years, seoer common tools. If the log file is small, you can also use Excel to analyze and view
IIS Log View