Date: Fri, 23 May 1997 20:47:08 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: current@FreeBSD.ORG Subject: Re: cd9660 filesystem slowed down ??? Message-ID: <19970523204708.YT49812@uriah.heep.sax.de> In-Reply-To: <199705231314.XAA27893@godzilla.zeta.org.au>; from Bruce Evans on May 23, 1997 23:14:52 %2B1000 References: <199705231314.XAA27893@godzilla.zeta.org.au>
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As Bruce Evans wrote: > The second dd uses the too-small block size of 512. Apparently > read-ahead doesn't work for too-small block sizes in -current. > I get 50K/sec for a block size of 512 and almost 1200K/sec for > a block size of 2K. Indeed: j@uriah 146% dd if=/cdrom/yyyy of=/dev/null bs=2k 1392+1 records in 1392+1 records out 2850915 bytes transferred in 8.732749 secs (326462 bytes/sec) (No, this was a different file than in the other example.) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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