Date: Wed, 26 Apr 2000 16:55:58 +0200 (EET) From: Narvi <narvi@haldjas.folklore.ee> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Michael Bacarella <mbac@nyct.net>, Alfred Perlstein <bright@wintelcom.net>, Kevin Day <toasty@dragondata.com>, hackers@FreeBSD.ORG Subject: Re: Double buffered cp(1) Message-ID: <Pine.BSF.3.96.1000426165333.74116e-100000@haldjas.folklore.ee> In-Reply-To: <200004221736.KAA55484@apollo.backplane.com>
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On Sat, 22 Apr 2000, Matthew Dillon wrote: [snip] > disk itself is probably the bottleneck. Disk writes tend to be > somewhat slower then disk reads and the seeking alone (between source > file and destination file), even when using a large block size, > will reduce performance drastically verses simply reading or writing > a single file linearly. Double buffering may help a disk-to-disk > file copy, but I doubt it will help a disk-to-same-disk file copy. > Wouldn't coping the file to another disk and then back to the original one than just a simple copy in some cases be faster then? After all, you are saving a lot of head seeks. > -Matt > Matthew Dillon > <dillon@backplane.com> > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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