User manual

Cobalt CacheRaQ Administration

Download Log Files. This page lets you download entire log

ﬁles on a daily basis — it lists all the available access.log and

cache.log ﬁles from previous days. To download a log ﬁle via

your browser, you shift-click the ﬁlename. You can also click a ﬁle

to view it; but keep in mind that these ﬁles (particularly

access.log) can be quite large and therefore may be cumbersome

to display in a Web browser.

Cache Statistics

The CacheRaQ's caching software records information on all

HTTP requests it receives. Statistics are calculated nightly from

this data and are available on a daily basis for the current month

and the preceding month.

Using the Cache Statistics page is a two-step process. First, you

select the type of statistics you want to display. Then you specify

a time period for which you want to see the statistics. You can

select an arbitrary combination of days from the last two months

for which you want to see statistics. Or you can enter a time value

(in minutes, seconds, or hours) to have statistics calculated for the

immediate past for the amount of time you’ve speciﬁed (up to the

start of the current day).

There are two main types of statistics available: summary statistics

and usage statistics. Summary statistics are described

immediately below; usage statistics are described later.

Summary Statistics. This option displays the following

information for the time period you specify:

• Number of clients. This is the number of unique client IP

addresses that made requests through the CacheRaQ.

• Number of cache hits. A cache hit is a request in which the

requested document was delivered from the cache — the

document didn’t have to be downloaded from the original

server.

• Number of cache misses. A cache miss is a request in which

the requested document was not in the cache and had to be

retrieved from the original server.

• Total number of documents sent to clients

• Number of bytes sent to clients from cache hits

• Number of bytes sent to clients from cache misses

• Total number of bytes sent to clients