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Re: OT: Preserving Information

by Abigail-II (Bishop)
on Oct 08, 2002 at 16:43 UTC ( #203689=note: print w/replies, xml ) Need Help??


in reply to Re: Re: OT: Preserving Information
in thread OT: Preserving Information

I don't have a problem with a pure cache - one that will check whether information is stale before serving it. But caches that don't check the backend are a gray area. Personally, I don't have a problem with them, as long as they have a reasonable expiration period (that is, if the backend data is removed or modified, the cache should reflect that after a not-to-long period). But if a cache doesn't expire documents that have disappeared, or where the expire period is unreasonably large I think they are wrong. It might have legal problems as well.

Abigail

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Re: Re: OT: Preserving Information
by Dog and Pony (Priest) on Oct 09, 2002 at 07:35 UTC
    I don't know how long Google keeps their cache, I can't find that information, but I know that I've upon occassion found sites that were gone (by some time) via their cache instead. Supposedly I guess that the cache would disappear when the site is no longer indexed, ie due to disappearance, but that is a tough one - a site might be down, when do they consider it gone? OTOH, any site owner may request that Google does not cache their site, which is somthing like an opt-out solution then I guess.

    By your definition, I guess theirs is a grey area then.


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[tye]: We use auditd for security monitoring. So we can rely on auditing being enabled. I'm not sure who would want to not be able to audit. Maybe some VM inside another system with audit?
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[erix]: spies should use a type-writer, no power needed, no auditable

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