Date: Wed, 25 Oct 1995 12:00:01 -0700 From: Bruce Evans <bde@zeta.org.au> To: freebsd-bugs Subject: Re: kern/792: cd9660 very slow Message-ID: <199510251900.MAA05655@freefall.freebsd.org>
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The following reply was made to PR kern/792; it has been noted by GNATS. From: Bruce Evans <bde@zeta.org.au> To: FreeBSD-gnats-submit@freebsd.org, murduth@ludd.luth.se Cc: Subject: Re: kern/792: cd9660 very slow Date: Thu, 26 Oct 1995 04:50:07 +1000 >I only get 200k/s transfer speed from the cdrom when mounted. But cat'ing from t >he raw-device yeilds 600k/s what gives. Huge overhead on the cd9660 fs? Slowness is normal for small files on most file systems :(. I get only 129K/sec for `tar cf /dev/null /usr/src/bin' on a SCSI disk that has a raw throughput of 2500K/sec and an iozone throughput of 1200K/sec. How big are the files that you only get 200K/sec on? cd9660 doesn't support clustering unless the block size is >= 4K (unlikely) so it is likely to be slow on large files too. Bruce
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