Cache question.

Jim Reid jim at rfc1035.com
Wed Aug 9 08:52:10 UTC 2000


>>>>> "Niels" == Niels =?iso-8859-1?Q?Stenh=F8j?= <Niels> writes:

    Niels> When using a Linux computer with nothing but an ISDN dial
    Niels> up connection it's normal procedure to shut down your
    Niels> computer at night.

    Niels> But then of course the cache gets lost. It would ease the
    Niels> overall functionality of your computer if the DNS cache
    Niels> could be saved and reloaded when booting. Bind 8.2.2 P5
    Niels> doesn't seem to allow for such a function.

    Niels> If anybody knows of workaround of this issue, suggestions
    Niels> are mostly wellcome.

Er, don't shut down your computer at night?

If there was some way of restoring an old cache - "old" is the
operative word here! - it would be a largely futile exercise. By the
time you put back the cache the next day, most of the cached data will
have expired. The feature could maybe be useful for debugging or
troubleshooting purposes, but not for routine operation. Expecting the
name server's cache to persist across reboots is a bit like expecting
TCP connections to be preserved across reboots too. After all the name
server's cache is a transient data structure.



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