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Managing Web sites at CERN

Managing Web sites at CERN

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Statistics & Logs

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Requests to all centrally managed web sites are logged, i.e. a record is kept for every request for a web page or file (including images), whether it is succesful or not. Web site logs have many usages: statistics generation, analysis of site usage, debugging of errors, identification of broken links...
Web site administrators can download the log files for their web site from the log file download page. Different log formats are proposed for easy analysis of the information.

Please notice that logs are only available for the current year.

Options when retrieving log files

Log formats

Several text formats are available for the log files
  • HTML: renders log files in a human-readable way that can be displayed in the web browser.
  • CSV: (coma-separated values) a common, text-based data exchange format. Use it to import the log data into a spreadsheet or database for further processing.
  • W3C Extended: a standard log format that can be processed natively by most log-analysis tools in order to generate statistics.

Time zones

You can control how each log entry's timestamp is computed
  • UTC: (Universal Time Coordinated) is equivalent to GMT (Greenwich Meridian Time). This is the standard international time.
  • Local Geneva Time: (UTC+1) timestamps will indicate Geneva time, including daylight savings changes.

Download formats

You can choose how log files are retrieved
  • Single log file: all the log entries over the requested period will be retrieved in a single, flat file. It can be compressed within a ZIP file in order to save bandwidth.
  • Daily log files: generates a separate log file for each day over the requested time period. These log files are packaged in a single ZIP file for you to download.

Meaning of the fields in the log files

Field Appears As Description
Date date The date on which the activity occurred.
Time time The time the activity occurred.
Client IP Address c-ip The IP address of the client that accessed your server.
User Name c-username The name of the authenticated user who accessed your server. This does not include anonymous users, which are represented by a hyphen.
Server IP s-ip The IP address of the server on which the log entry was generated.
Server Port s-port The port number the client is connected to.
Method cs-method The action the client was trying to perform (for example, a GET method).
URI Stem cs-uri-stem The resource accessed; for example, Default.htm.
URI Query cs-uri-query The query, if any, the client was trying to perform.
HTTP Status sc-status The status of the action, in HTTP terms.
HTTP Version cs-version The version of the HTTP protocol used.
Bytes Transferred sc-bytes The number of bytes sent by the server.
User Agent cs(User-Agent) The browser used on the client.
Referer cs(Referer) The page the user is coming from.

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