From owner-FreeBSD-tech-jp@jp.freebsd.org  Thu Aug  6 10:57:03 1998
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To: FreeBSD-tech-jp@jp.freebsd.org
From: Kenichi Okuyama <okuyama@trl.ibm.co.jp>
In-Reply-To: Your message of "Thu, 06 Aug 1998 00:17:55 +0900"
	<199808051517.AAA19974@volvo.kom.comm.waseda.ac.jp>
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Subject: [FreeBSD-tech-jp 1694] Re: Disk write speed 
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$B1|;3!w#I#B#M$G$9!#(B

>>>>> "$B2,@%(B" == Yasuyuki OKASE <yokase@volvo.kom.comm.waseda.ac.jp> writes:
>> > $B$b$7$+$7$F(BFreeBSD$B$N(BDISK-IO$B$C$FCY$$$s$G$7$g$&$+!)(B
>> AIX$B$N(B $B$=$N%^%7%s$HHf$Y$F$O(B $B$I$&$@$+$o$+$j$^$;$s$,!"(B
>> SCSI$B$O(B $BCY$$$G$9!#(BIDE$B$O(B FreeBSD 3.X $B$K$J$k$HAa$$$G$9!#(B

AIX $B$O$=$b$=$b!"%U%!%$%k%7%9%F%`$,0c$&$N$G$9$+$i!"(BSCSI $B$H$+(B IDE $B$H$+(B
$B$N(B write cache $B5!G=$N(B ON/OFF $B$H$$$&C1=c$JHf3SLdBj$K$O$J$i$J$$$H;W$&(B
$B$N$G$9$,!D(B

AIX $B$N%U%!%$%k%7%9%F%`$O!"(BJFS $B$H$$$C$F!"(BBSD4.4 $B$G$$$&$H$3$m$N(B Log
Structured File System $B$K6a$$%U%!%$%k9=B$$K$J$C$F$$$^$9!#$3$$$D$O4p(B
$BK\E*$KDI5-7?$N%U%!%$%k%7%9%F%`$J$N$G!"$=$b$=$b!"(BWrite Cache $B$J$I$r(B
ON $B$K$7$F$b:,K\E*$K2u$l$K$/$$9=B$$K$J$C$F$$$^$9!#(B

$B$3$l$r!"(BuFS $B$d(B FFS $B$J$I$N(B
$B!V=q$-9~$_$r(B cache $B$7$F$$$k:GCf$K%^%7%s$,$3$1$?$iBgA{$.!W(B
$B$J%U%!%$%k%7%9%F%`$HC1=cHf3S$9$k$N$ONI$/$J$$$H;W$$$^$9!#(B


JFS $B$K$b7gE@$,$"$j$^$7$F!"$3$$$D$O(B
1)$BFI$_9~$_%-%c%C%7%e$,M-8z$K$J$k$0$i$$$?$/$5$s<B%a%b%j$,$"$k$H$$$&2>(B
  $BDj$,I,MW$G$"$k!#(B
2)$BDI5-7?$J$N$G!"$H$-$I$-(B GC $B$KAjEv$9$k$b$N$,F0$-=P$9$,(B($B$=$7$F!"4pK\(B
  $BE*$K$O2K$J$H$-$KF0$$$F$/$l$k$N$@$,(B)$B$3$l$,7c$7$/CY$$!#$7$?$,$C$F!"(B
  $BIT9,$,=E$J$k$H(BIO $B$OCx$7$/Nt2=$9$k!#(B
$B$J$I$NLdBj$,$"$j$^$9!#FC$K(B2$BHVL\$O$3$-;H$C$F$$$k$H$H$F$bL\$K$D$/7y$J(B
$B@-<A$G$9!#(B
---- 
$B1|;3(B $B7r0l(B@$BEl5~4pAC8&5f=j(B.$BF|K\(BIBM($B3t(B)[$BFzLn(BFC:No.0000000015]
http://karin.isl.titech.ac.jp/~okuyama/index.html
#$B:#F|$N$*8@MU!X$U$)$*!"(BMew$B$,(BMeadow+NT$B$GF0$$$?!Y(B:$B$d$O$j(B b51 $B$r(B
#$BA*$V$H$$$&$N$,%-!<$G$"$C$?$+!#(B


