Date: Thu, 30 May 2002 06:03:58 +0200 From: Matthias Buelow <mkb@mukappabeta.de> To: Kirk Strauser <kirk@strauser.com> Cc: freebsd-questions@freebsd.org Subject: Re: mv vs. tar [overlapping] Message-ID: <20020530040358.GA1262@altair.mukappabeta.net> In-Reply-To: <87bsayjouu.fsf@pooh.int> References: <20020530022609.GA956@altair.mukappabeta.net> <20020529223005.O79882-100000@earl-grey.cloud9.net> <20020530030413.GA1063@altair.mukappabeta.net> <87bsayjouu.fsf@pooh.int>
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Kirk Strauser writes: [not much difference between 1 process doing sequential read/write, and 2 processes, one reading from disk, other writing] >That's assuming that 1) the source and destination are on the same drive, >and 2) the filesystem(s) in question aren't on RAID volumes. In either of >those cases, parallelizing transfers will certainly increase performance. But will the sending process be able to write to the pipe when it's locked up by reading from disk, and will the receiving process be able to read from the pipe, when it's locked up writing to (possibly a different) disk? The whole issue will get serialized again. --mkb To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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