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Date: Wed, 25 Oct 1995 12:00:01 -0700
Message-Id: <199510251900.MAA05655@freefall.freebsd.org>
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From: Bruce Evans <bde@zeta.org.au>
Subject: Re: kern/792: cd9660 very slow
Reply-To: Bruce Evans <bde@zeta.org.au>
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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