Date: Fri, 6 Apr 2001 12:17:25 +0800 From: David Xu <bsddiy@21cn.com> To: Dan Phoenix <dphoenix@bravenet.com> Cc: Charles Burns <burnscharlesn@hotmail.com>, questions@freebsd.org Subject: Re[2]: how can you say ufs is faster? Message-ID: <13713697115.20010406121725@21cn.com> In-Reply-To: <Pine.BSO.4.21.0104012107450.31373-100000@gandalf.bravenet.com> References: <Pine.BSO.4.21.0104012107450.31373-100000@gandalf.bravenet.com>
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Hello Dan, Monday, April 02, 2001, 12:14:17 PM, you wrote: DP> I am not disagreeing with you for your case study or OS for that matter as DP> I do prefer freebsd much over linux anyday. IN a test I did where qmail DP> was overloaded with mail on both a linux fs then a freebsd fs, linux fs DP> outperformed freebsd no problems. Ufs , maybe i am wrong but is way slower DP> when writing to files. Maybe reading sure.....but i am convinced writing DP> there is no way. What i ended up doing was just striping 3 scsi drives DP> together with vinum on freebsd because i try not to use linux unless DP> SMP is a major factor. IF you look over current SMP code in kernel DP> i can say linux and solaris do it way better......and there is no way fbsd DP> can do it without a complete re-write of kernel which they are promising DP> in 5.0....but we will see. I really question your benchmark program.... DP> what do you use and your stats were based on more than 1 benchmark test DP> right? evaluting a FS performance is difficult, I don't think ext2fs is fast, you may not test deleting large file in ext2fs, it is a slowest file system I ever saw, but UFS in FreeBSD is very fast at removing a huge file. I suppose you are hosting a free web server, there are lots of users online, suppose they are all reading mail, and then remove readed mail, you user will hit EXT2FS's weakness, your system will slow down because of EXT2FS is slow at removing file. yes many testing just pass through to SMTP to see if your mail server can receive how many mails in one second, but it is obvious not enough, don't ignore benchmark of removing file! -- Best regards, David Xu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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