From owner-freebsd-hackers Wed Mar 12 18:01:15 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id SAA25866 for hackers-outgoing; Wed, 12 Mar 1997 18:01:15 -0800 (PST) Received: from parkplace.cet.co.jp (parkplace.cet.co.jp [202.32.64.1]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id SAA25859; Wed, 12 Mar 1997 18:01:11 -0800 (PST) Received: from localhost (michaelh@localhost) by parkplace.cet.co.jp (8.8.5/CET-v2.1) with SMTP id BAA24481; Thu, 13 Mar 1997 01:59:13 GMT Date: Thu, 13 Mar 1997 10:59:12 +0900 (JST) From: Michael Hancock To: Joe Greco cc: Tom Samplonius , taob@risc.org, mmead@goof.com, isp@freebsd.org, hackers@freebsd.org Subject: block and frag size for news (was Re: freebsd as a news server?) In-Reply-To: <199703111608.KAA28112@solaria.sol.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk On Tue, 11 Mar 1997, Joe Greco wrote: > Yeah, well, I've traditionally used 4096/512 but in the last year or so > it's seemed to me that a few machines that I have with 8192/1024 are > "faster" (based mostly on feel). I had done some experimentation that > seemed to support that. I'm using 4096/1024. I think the overhead of managing 512K frags is not worth the efficient use of space and this is probably the performance problem. I would think that having a block size at 8192 would cause too many frag to block promotions on a news spool. Again I've been using. newfs -i 3072 -b 4096 -f 1024 -a 8 I used -a 8 to leave it at the default and as Bruce points out since the rotational delay now defaults to 0 the maxcontig setting probably doesn't matter. It might matter I suppose if it actually goes thru the motion of triggering a rotational delay, even if it's 0, after every 8 blocks. Using -i 3072 makes my df and df -i %Free columns very close for most spools. Regards, Mike Hancock