Persistent cache

[Danny Mayer]

At 07:23 PM 10/31/02, Jim Reid wrote:
>None of what you say conflicts or corrects what I said earlier. It is
>highly improbable that you can measure a discernable difference from
>pre-loading the cache. [With stale data no less!] Remember all you're
>saving is the overhead of the initial lookup. At best this is a
>micro-optimisation. One big drawback of loading an old cache is that
>the server is fed possibly out of date information. The consequences
>of that could be far reaching and very unpleasant: much, much worse
>than the cost of an extra DNS lookup or two.

For example, cache poisoning becomes much harder to get rid of and
the costs of the first lookup are going to be lost in the noise of
everything else the server is doing. It's almost not measurable outside
of a test.

Danny