Date: Tue, 14 Oct 2003 23:48:37 +0800 From: "Michael Lee" <kclee@tiny.ws> To: <freebsd-questions@freebsd.org>, "Kirk Strauser" <kirk@strauser.com> Subject: Re: Hardware RAID vs softupdates Message-ID: <001601c3926a$a2d124f0$6401a8c0@kclee> References: <000b01c39237$c52f8bf0$6401a8c0@kclee> <87ekxfsybe.fsf@strauser.com>
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Hi Kirk, Thank you for your reply but I think that you probably misunderstand me. So far as I know, FFS with softupdates support acts quite similar to async. file system. However, hardware based RAID controller card is usually equipped with some cache RAM. In some aspects, RAID controller card acts somewhat like async. file ssytem. I wonder if RAID controller waits for a certain time before it does command "write" to disk and then this "write" command then was queued by softupdates.... Will it be faster if I use softupdates with hardware RAID system ? Thanks! Michael Lee ----- Original Message ----- From: "Kirk Strauser" <kirk@strauser.com> To: <freebsd-questions@freebsd.org> Sent: Tuesday, October 14, 2003 10:12 PM Subject: Re: Hardware RAID vs softupdates At 2003-10-14T09:44:31Z, "Michael Lee" <kclee@tiny.ws> writes: > I have 4 SCSI hdds connect to this controller card. I wonder if I should > disable the softupdates feature for the FFS to make the system runs > faster. Out of curiosity, what part of the system do you think would be faster without softupdates? -- Kirk Strauser "94 outdated ports on the box, 94 outdated ports. Portupgrade one, an hour 'til done, 82 outdated ports on the box."
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