From: H. Peter Anvin <hpa@zytor.com>
Date: Sun, 10 Dec 2006 21:01:50 GMT
Subject: Re: kernel.org mirroring (Re: [GIT PULL] MMC update)
Message-ID: <457C75BE.1010805@zytor.com>
In-Reply-To: <Pine.LNX.4.64.0612101129190.12500@woody.osdl.org>

Linus Torvalds wrote:
> 
> Now, hopefully some of it will be in the disk cache, but when the 
> mirroring happens, it will basically blow the disk caches away totally 
> (when using the "--checksum" option), and then you literally have tens of 
> seconds to generate that one top-level page. 
> 

If that was the only time that happened, it would be a non-issue, since 
that only happens once every 96 hours.  However, the problem is that we 
now have lots of large datasets that blow out the caches on a much more 
frequent basis.