User manual

Chapter 3
24
CPU Usage
This page displays a graph of the CacheRaQ’s load average as it
varies over time. The system’s load average is a rough indicator
of overall system activity. Generally speaking, a high load
average indicates a busy system. A CacheRaQ with a load
average that routinely exceeds 1.0 may be overloaded— a Cache
Cluster might be appropriate for the workload in this situation.
Contact Cobalt Support for diagnostic assistance if you believe
your CacheRaQ is overloaded.
Maintenance
This section of the administrative interface combines three
unrelated maintenance features.
Admin Setup. This page lets you configure the Administrator’s
password (which is required) and an external e-mail address that
will receive mail to the admin user (this e-mail address is
optional). Note that email Reports (described in the Report Setup
section above) will be sent to admin, so use the Admin Setup page
to set the real e-mail address to which you want the reports sent.
Time Setup. This page lets you set the time and time zone on the
CacheRaQ. It is important to set the time correctly, because the
CacheRaQ software does log-file rotation and statistics
generation shortly after midnight each day. This time is chosen
because it’s close to the start of the day. This way, each day’s log
files and statistics accurately reflect the actual usage that occurred
on the corresponding calendar day.
Update Software. From time to time, Cobalt Networks, Inc. may
issue updates to critical software that runs on its products.
Updates can be obtained from the Cobalt Web page
(www.cobaltnet.com). Updates come in the form of a “Package”
file with a “.pkg” file name suffix. The Update Software page
allows you to install new packages on the CacheRaQ.
To install a package, first obtain the pkg file from Cobalt
Networks, Inc. Save this file on your local computer (i.e., on the
computer on which you run your Web browser). Then access the
Update Software page on the CacheRaQ administrative interface.
On the Update Software page, enter the filename of the .pkg file
you want to install. The “Browse...” button lets you find the file
on the computer running your Web browser.