max-uncheck
|
(Optional) is the maximum time in seconds, allowed between consecutive
up-to-date checks. If set to 0 (default), a check is made every time the document
is accessed, and the lm-factor has no effect.
|
lm-factor
|
(optional)A floating point number representing the factor used in estimating
expiration time (how long a document might be up to date based on the time
it was last modified). The time elapsed since the last modification is multiplied
by this factor, and the result gives the estimated time the document is likely
to remain unchanged. Specifying a value of 0 turns off this function, and
then the caching system uses only explicit expiration information (rarely
available). Only explicit Expires HTTP headers are used. This value has no
effect if max-uncheck is set to 0.
|
connect-mode
|
Specifies network connectivity and can be set to these values:
-
always (default) connects to remote servers
when necessary.
-
fast-demo connects only if the item isn’t
found in the cache.
-
never no connection to a remote server
is ever made; returns an error if the document is not found in the cache.
|
cover-errors
|
If present and greater than 0, returns a document from the cache if
the remote server is down and an up-to-date check cannot be made. The value
specified is the maximum number of seconds since the last up-to-date check;
if more time has elapsed, an error is returned. Using this feature involves
the risk of getting stale data from the cache while the remote server is down.
Setting this value to 0, or not specifying it (default) causes an error to
be returned if the remote server is unavailable.
|
term-percent
|
means to keep retrieving if more than the specified percentage of the
document has already been retrieved.
|