Date: Sat, 1 Jun 1996 13:05:19 -0400 (EDT) From: Peter Dufault <dufault@hda> To: bde@zeta.org.au (Bruce Evans) Cc: bde@zeta.org.au, dufault@hda.zipnet.net, hackers@FreeBSD.ORG, terry@lambert.org Subject: Re: Breaking ffs - speed enhancement? Message-ID: <199606011705.NAA10369@hda> In-Reply-To: <199606011623.CAA23320@godzilla.zeta.org.au> from "Bruce Evans" at Jun 2, 96 02:23:12 am
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> You would still have to keep the update marks somewhere :-). They > should compress very well since they are only 1 bit to begin with > and have a steady state value of 1 :-). You need update marks, but if you don't need to change them from marks to time stamps when the files are closed you reduce the overhead of a file system full of many small files being thrashed open and closed. No, I haven't thought through the benefits and drawbacks - I'll shutup. Note that read-only file systems obviously don't have time stamps, giving me some screwy ideas about how to look at the original problem if it is heavily loaded on the read side. -- Peter Dufault Real-Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267
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