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36 Intel NetStructure Cache Appliance Administrator’s Guide
Storage
The following table describes the storage options.
Freshness
The following table describes the freshness options.
Option Description
Maximum
HTTP/FTP
object size in
bytes
Specifies the maximum size of HTTP or FTP objects the
appliance can cache.
Use a 0 (zero) to indicate no limit.
Maximum
number of
alternate
versions
(HTTP)
Specifies the maximum number of HTTP alternates that the
appliance can cache.
Use a 0 (zero) to indicate no limit. If a popular URL has
thousands of alternates, you might observe increased cache
hit latencies (transaction times) as the appliance searches
through the alternates for each request. In particular, some
URL addresses can have large numbers of alternates due to
cookies. If the appliance is set to vary on cookies, you might
encounter this problem. See Variable content‚ on page 38 for
more information.
Option Description
Verify
freshness
by checking
Configures the appliance to ask the original content server to
verify the freshness of objects according to the following list
before serving them.
❚ when the object has expired
❚ when the object has expired or if the object has no
expiration date
❚ always
❚ never
Minimum
freshness
information for
a document to
be cached
Specifies the minimum freshness information required to
consider a document able to be cached:
❚ an explicit lifetime
❚ a last-modified time
❚ nothing
If an object
has no
expiration
date
Specifies the time limits the appliance will keep an object in
the cache:
❚ minimum time in the cache. You can specify from
15 minutes to two weeks.
❚ maximum time in the cache. You can specify from
15 minutes to two weeks.