posted on 9:00 AM, October 16, 2009
The Webalizer is a fast web server log file analysis program. It produces highly detailed, easily configurable usage reports in HTML format, for viewing with a standard web browser.
By default, The Webalizer produces two kinds of reports - a yearly summary report and a detailed monthly report, one for each analyzed month.
The yearly summary report provides such information as the number of hits, file and page requests, hosts and visits, as well as daily averages of these counters for each month. The report is accompanied by a yearly summary graph.
Each of the monthly reports is generated as a single HTML page containing a monthly summary report (listing the overall number of hits, file and page requests, visits, hosts, etc), a daily report (grouping these counters for each of the days of the month), an aggregated hourly report (grouping counters for the same hour of each day together), a URL report (grouping collected information by URL), a host report (by IP address), website entry and exit URL reports (showing most common first and last visit URLs), a referrer report (grouping the referring third-party URLs leading to the analyzed website), a search string report (grouping items by search terms used in such search engines as Google), a user agent report (grouping by the browser type) and a country report (grouping by the host's country of origin).
Each of the standard HTML reports described above lists only top entries for each item (e.g. top 20 URLs). The actual number of lines for each of the reports is controlled by configuration. The Webalizer may also be configured to produce a separate report for each of the items, which will list every single item, such as all website visitors, all requested URLs, etc.
Website traffic analysis is produced by grouping and aggregating various data items captured by the web server in the form of log files while the website visitor is browsing the website. Some of the most commonly-used website traffic analysis terms are listed below:
In order to illustrate the difference between hits, pages and files, let's consider a user requesting an HTML file referring to five images, one of which is missing. In this case the web server will log six hits (i.e. one successful for the HTML file itself and four for successfully retrieved images and one for the missing image), five files (i.e. five successful HTML requests) and one page (i.e. the HTML file).
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