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From: Marc G. Fournier <[email protected]>
To: Peter Eisentraut <[email protected]>
Cc: Dave Page <[email protected]>
Cc: John Hansen <[email protected]>
Cc: Devrim GUNDUZ <[email protected]>
Cc: PostgreSQL WWW Mailing List <[email protected]>
Subject: Re: Problem with mirrorring
Date: Sun, 3 Oct 2004 11:03:49 -0300 (ADT)
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <E7F85A1B5FF8D44C8A1AF6885BC9A0E407B40D@ratbert.vale-housing.co.uk>
	<[email protected]>

On Sun, 3 Oct 2004, Peter Eisentraut wrote:

> Dave Page wrote:
>> Of course, how it does that is a mystery to me - without fully
>> comparing both versions, how can it create a diff? I guess that's
>> what made it PhD material...
>
> It doesn't create a diff.  It computes checksums for pieces of the file
> and transfers those.
>
> Apparently, though, it first checks the modification time before doing
> all that checksum stuff.

Right, and if you want, you can use the --size-only arg to rsync to 
disable the timestamp check and made it only a size check ... so, if the 
size doesn't change, the page wasn't actually modified ... and, I can't 
think of many situations where if hte file changed, the size wouldn't 
change by *at least* one character, but I imagine it could happen ...

----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email: [email protected]           Yahoo!: yscrappy              ICQ: 7615664

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