Date: Tue, 10 Apr 2001 22:02:13 +0100 From: Brian Somers <brian@Awfulhak.org> To: Zhihui Zhang <zzhang@cs.binghamton.edu> Cc: Matt Dillon <dillon@earth.backplane.com>, Brian Somers <brian@Awfulhak.org>, Jason DiCioccio <Jason.DiCioccio@Epylon.com>, "'current@freebsd.org'" <current@FreeBSD.ORG>, brian@Awfulhak.org Subject: Re: FW: Filesystem gets a huge performance boost Message-ID: <200104102102.f3AL2Da63016@hak.lan.Awfulhak.org> In-Reply-To: Message from Zhihui Zhang <zzhang@cs.binghamton.edu> of "Tue, 10 Apr 2001 16:48:16 EDT." <Pine.SOL.4.21.0104101640100.624-100000@onyx>
next in thread | previous in thread | raw e-mail | index | archive | help
> Why VMIO dir works better if directories are placed close to each other? I
> think it only makes the cache data of an individual directory stay in the
> memory longer. Is there a way to measure the effectiveness of the disk
> drive's cache?
The real performance gain is seen when doing stuff with large
directory hierarchies such as /usr/ports or (I think) a squid cache.
The close proximity of the directories means they can be read/written
far more quickly than before (where they were specifically placed in
different clusters).
> -Zhihui
--
Brian <brian@Awfulhak.org> <brian@[uk.]FreeBSD.org>
<http://www.Awfulhak.org>; <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200104102102.f3AL2Da63016>