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Date: Wed, 21 Jul 1999 16:16:45 +0900
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From: Shunsuke Akiyama <akiyama@kme.mei.co.jp>
To: FreeBSD-users-jp@jp.freebsd.org
In-Reply-To: In your message of "Wed, 21 Jul 1999 15:40:52 +0900"
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$B$"$-$d$^$G$9!#(B

At Wed, 21 Jul 1999 15:40:52 +0900,
Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> wrote:

> $B$"$i(B, $B$=$&$G$9$+(B. root filesystem $B$,(B 2048 bytes/sector $B$J$N$G$7$g$&$+(B?
> $B$3$A$i$G$O(B, $B$=$&$$$&4D6-$G$O;n$7$F$$$^$;$s(B.

$B%F%9%H4D6-$,<j85$K$J$$$N$G!"$3$l$O$A$g$C$H$o$+$j$^$;$s!#(B

> > spec_getpages() $B$G85$N(B file system $B$N%U%i%0%a%s%H!&%5%$%:$H$+$,I,MW$G(B
> > $B$7$g$&$+!)(B
> > $B$3$3$O!"3:Ev$9$k%G%P%$%9$KBP$9$k!":G>.(B I/O $B%5%$%:$,$o$+$l$P!"$=$l$G$$(B
> > $B$$$N$G$O!#(B
> 
> $BK\Mh$O$=$&$G$9$M(B. $B$H$j$"$($:4JC1$J$N$G(B, fragment size $B$GBeMQ$7$F(B
> $B$7$^$$$^$7$?(B.

$B$G$OM>7W$K!"(Bspecinfo $B$KFM$C9~$s$I$$$F!"$3$l$r;H$&$H$$$&$N$,4JC1$@$H;W(B
$B$$$^$9$M!#(B

> > $B$=$l$H!"(Bstruct specinfo $B$K5M$a9~$`$@$1$J$i!"(Bspec_open $B$N;~$K$d$C$F$7$^(B
> > $B$($P!"$=$l$G=*$j$N$h$&$J5$$,$7$^$9!#(B
> > $B<B:]!"ESCf$^$G%3!<%G%#%s%0$7$F$_$F!"%;%/%?!&%5%$%:$,<h$l$k$H$3$m$^$G$O(B
> > $B3NG'$7$F$^$9$,!"$=$l$G$O%@%a$J$N$+$J$"!#(B
> > 
> > $B!t(B $B$$$d!";d$,A4A3$o$+$C$F$J$/$F!"JQ$J$3$H$r$7$F$k!"$H$$$&$3$H$+$b$7$l(B
> > $B!t(B $B$^$;$s$1$I!#(B
> 
> $B$$$d(B, $B$=$l$b0l$D$N<j$@$H;W$$$^$9(B.
> $B$?$@(B, $B:rF|$^$G$N(B -curret $B$NOHAH$G$O(B, d_open $B$G$O$J$/(B d_parms $B$G(B,
> $B$D$a$3$`$h$&$K$J$C$F$$$?$N$G$9$,(B, $B:#F|(B phk $B$,$^$?JL$N$K=q$-$+$($F(B,
> $B$=$NOHAH$_$O>C$($F$^$9$M(B....
> $B$A$g$C$HD4$Y$F$_$J$$$H$o$+$j$^$;$s(B.

d_parms $B$r;H$&J}K!$G$O!"$&$^$/$$$+$J$$$G$7$g$&!#(B
[bc]devsw $B$N%a%s%P7PM3$G$O!"%^%$%J!<HV9f$,9MN8$5$l$F$^$;$s$+$i!#(B

> DVD-RAM $B$NFI$_$3$_$,CY$/$J$k$H$$$&7o$O(B, $BC1$K=q$-$3$s$G$J$$$H$3$m(B
> $B$rFI$`$,CY$$$@$1$G(B, $B<BMQ>eLdBj$J$$$3$H$,$o$+$j$^$7$?(B.
> sequential $B$K$O(B
> READ:  1.3 - 1.4 MB/s
> WRITE: 400 - 500 KB/s
> 
> $B$H$$$&$3$H$G(B, WRITE $B$,(B READ $B$N(B 1/3 $B$0$i$$$J$s$G$9$,(B, $B$=$s$J$b$s$G$7$g$&$+(B.
> $B$"$H$d$C$Q(B seek $B$,CY$$$G$9$M(B. LFS $B$H$+M_$7$/$J$j$^$9(B.

$B$3$s$J$b$N$G$O$J$$$G$9$+!)(B
$B$A$H!"8E$$$G$9$,!"0JA0(B iozone $B$G<h$C$?%G!<%?$,$"$j$^$9$+$i!"=P$7$F$*$-(B
$B$^$9!#(B

# iozone 128

        IOZONE: Performance Test of Sequential File I/O  --  V2.01 (10/21/94)
                By Bill Norcott

        Operating System: FreeBSD 2.x -- using fsync()

        Send comments to:       b_norcott@xway.com

        IOZONE writes a 128 Megabyte sequential file consisting of
        262144 records which are each 512 bytes in length.
        It then reads the file.  It prints the bytes-per-second
        rate at which the computer can read and write files.


Writing the 128 Megabyte file, 'iozone.tmp'...217.070312 seconds
Reading the file...92.937500 seconds

IOZONE performance measurements:
        618314 bytes/second for writing the file
        1444171 bytes/second for reading the file

-- 
	$B=);3=SJe(B
	akiyama@kme.mei.co.jp
