Date: Fri, 21 Apr 2000 21:55:19 -0500 (CDT) From: Kevin Day <toasty@dragondata.com> To: hackers@freebsd.org Subject: Double buffered cp(1) Message-ID: <200004220255.VAA29433@celery.dragondata.com>
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Has anyone attempted to create a double buffered version of cp(1)? When copying from one disk to another, disk activity seems to ping-pong between the two, rather than keeping both active at the same time. If I were to fork and do something similar to afio, or maybe even doing something weird like using sendfile(it's faster than it sounds, and zero-copy), does anyone think I'd see any kind of speed boost? I'm effectively getting a little less than half the performance of just writing files filled with zero's, so I'm guessing this is where the bottleneck is, correct? -- Kevin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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