The log files in the following table are available to help you monitor your NetCache appliance.
Log type
|
Type of information logged
|
Customizable?
|
|---|
ContentDirector log
|
Reports diagnostic information about the ContentDirector agent software.
|
No
|
CMS log
|
Reports details of the appliance processing of the the table of contents (TOC) file generated by the DataFabric Manager (DFM computer).
This log is available only if the CMS (Content Management System) agent is enabled on the appliance through DFM or a third-party product.
|
No
|
DNS log
|
Reports information about the DNS lookups that were initiated by the NetCache resolvers.
|
No
|
FTP transfer access log
|
Records the details of FTP transactions on the NetCache appliance.
|
No
|
GRM server access log
|
If the GRM server is configured as a DNS server, the GRM server access log provides DNS query information from interactions between DNS nameservers and the GRM server.
If the GRM server is configured as an L7 server, the log reports the URL redirection information between the client and the GRM server (client IP address, the requested URL, and the agents to be returned).
|
Yes
|
GRM server details log
|
The GRM server details log records information about agents and IP addresses and the proximity data they send to the GRM server.
|
Yes
|
ICAP log
|
Reports information about ICAP server transactions. The default ICAP log file format captures common errors, such as unavailable services or ACL configuration problems.
|
Yes
|
Messages log
|
Reports NetCache events, such as reboots, device failures, and errors. Critical system events are also reported to the console. Use this log when you are looking for NetCache configuration or runtime errors.
Note
The syslog daemon automatically sends messages to the Messages log and the system console. Optionally, you can configure the Send the Appliance Messages to a Remote Server option on the System - Logging page in the Appliance Manager to immediately send syslog messages to a remote server's syslog daemon that is listening on port 514. |
No
|
--
|
Messages log file management
The Messages log is always enabled and cannot be disabled. The Messages log normally uses only a small amount of memory and generating it should not affect normal NetCache operations. The Messages log is never pushed or rotated like other NetCache logs. Regardless of the log file switching technique you select, a new Messages log is started every Sunday at midnight. At that time, the recently replaced messages file is copied to messages.0, the messages.0 file is copied to messages.1, and so on. The oldest Messages log is deleted.
|
|
NNTP access log
|
The NNTP access log records information about client transactions conducted through the appliance for news services.
|
Yes
|
Streaming access log
|
Reports information about client connections, including the client IP address and port number, the server host name and port number, the number of bytes sent, and the total connection time.
|
Yes
|
Streaming details log
|
Reports information about the internal transactions that occur during streaming connections, including object hit and miss information and bit-rate switching data.
|
Yes
|
Web server acceleration log
|
Reports transactions between the NetCache appliance configured as an accelerator and one or more Web servers that it accelerates, depending on how you have configured your Web (HTTP) accelerator rules.
You can log Web server acceleration transactions in the Web access log or in one or more Web server acceleration logs. Some organizations, such as CDNs, log Web server transactions separately for each customer for which they provide acceleration services.
Note
Log header settings for HTTP logging apply to the Web access log and the Web server acceleration logs. |
Yes
|
Web access log
|
Reports client transactions received by NetCache, whether requests are serviced or denied, and cache hits and misses. This log is used only for Web-based requests (such as HTTP and Gopher).
The Web access log is helpful for tracking the types of objects that are cache hits and misses. The Web access log is also helpful for evaluating the load on the NetCache appliance (for example, peak performance and the content requested at peak times).
|
Yes
|
NetCache appliance log files are enabled by default except for the Web server acceleration logs. The Messages log is always enabled and cannot be disabled. However, you can manually enable and disable the other NetCache logs from the Appliance Manager.
