User manual
Cache logs
Cobalt CacheRaQ 4 User Manual 47
Usage statistics
Four options let you view HTTP traffic statistics for individual clients (users) and
individual HTTP servers. Each option returns a list of client or server host names,
and for each host name, a count of documents sent by a server or received by a
client and a count of bytes sent by a server or received by a client.
• All clients. This option returns a list of clients that requested documents
through the CacheRaQ 4. The list contains the number of bytes sent to each
client and the number of documents sent to each client.
• A specific client. For a specified client host name or IP address, this option
returns a list of servers accessed by this client.
• All servers. This option returns a list of all servers that were accessed by one
or more clients through the CacheRaQ 4.
• A specific server. For a specified server host name or IP address, this option
returns a list of clients who made requests for documents on that server.
Each of the above options can be sorted by number of documents or by number
of bytes. Finally, you can specify the number of sites to be displayed by each of
the above options.
Cache logs
The CacheRaQ 4’s caching software logs data to two files in its normal course of
operation—access.log and cache.log.
• Access.log contains one line per request served. Among other things, each
line lists the URL of the requested document, the client’s IP address, the size
of the document and the time of the request. Access.log files can grow quite
large (up to approximately 100 MB per day). The amount of disk storage
devoted to access.log files can be set in the Cache Settings page, as described
in “1. Cache setup” on page 20.
• Cache.log contains informational messages describing the state of the cache
software. Cache.log also lists error messages that arise during normal
operation. For example, a message is logged whenever the caching software
fails to connect to a remote HTTP server.
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Note: The statistics can take some time to calculate. This is
particularly true of statistics for the current day, which must be
calculated from the raw access.log file.