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Apache web server is a public-domain open source web server and probably the most popular HTTP web server. This web server was originally developed for UNIX systems however Black Clayton Thorson Jersey , with development over the years, different versions of this server now supports other platforms like OS2 and Windows. Being easy to configure, the Apache HTTP server is used to support various plug-in modules for extensibility. It further supports web server features like CGI and SSL along with other virtual domains. Apache servers have excellent logging capabilities as well and most the events that take place on these servers are logged in different Apache log file formats.


Apache HTTP servers generate two basic types of event logs, viz. Black Shareef Miller Jersey , Apache Access Logs and Apache Error Logs. With the help of these logs, network administrators are able to categorize activities being performed on the servers. Events like site’s activity status, sites accessed by users, accessed files Black JJ Arcega-Whiteside Jersey , traversed paths, web browsers used, searches performed and page referred get recorded in the Apache log files. These log files are then viewed and analyzed with the help of Apache log analyzers such as Lepide Event Log Manager.


Using Apache log analyzers, network administrators are able to view both Error log files and Access log files in any log file format. The Common Log Format is the standardized format in which Apache log files are written although many hosting providers set Combined Log Format for their Apache server log files.


1. Apache Error log files record all the diagnostic information and errors encountered during processing requests or whenever some problem occurs in the server. The location of Apache error log files is controlled by the directive Error Log.


2. Apache Access log files contain information related to all incoming request which the Apache web server processes. The format of access log files is configurable and their location as well as content is controlled by the directive Custom Log.


Apache HTTP serves are capable of writing access and error log files to other processes through pipes rather than directly to the files. This very feature Black Miles Sanders Jersey , making the logging highly flexible as the need to write codes to the main server gets eliminated.


Apart from the “reliable piped logging”, Apache web serves also support “Conditional logging”. Conditional logging is performed when certain entries from the access logs are to be excluded based on client requests. The task can be performed in an in-built manner by Apache using “environment variables”. Although this type of logging makes Apache flexible and more powerful, it is not the right way to control log contents. The best way to control log content is to use Apache log analyzer tools which first collect every single data and later helps in removing the non-critical information.


As is evident, Apache log files provide critical information about web server activities Black Andre Dillard Jersey , tracking them down in a continuous basis is equally important for network administration. Event log analyzers help in this respect by monitoring real time events of the HTTP web servers and correlating the data for further analysis.


Tools like Lepide Event Log Manager are capable of monitoring log files in different formats like Common Log format, Combined format, W3C format, W3C Extended Log file format Black DeSean Jackson Jersey , IIS Log file format and NCSA Common Log file format. Other than monitoring and analyzing these common types of log file format, Apache log analyzer tools also tracks HTTP.sys Error Logging and Centralized Binary Logging.


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