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From: Kawaguti Ginga <ginga-freebsd@ginganet.org>
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Date: Wed, 27 Nov 2002 11:49:52 +0900
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Subject: [FreeBSD-users-jp 72349] RAID5 performance(software,hardware)
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$B@n8}$G$9(B

$BJL%9%l%C%I$G(B RAID $B4XO"$rD4$Y$F$$$F(B
RAID5 on MegaRAID i4 $B$N@-G=$K>W7b$r<u$1$?$N$G$9$,!$(B
$B0lHLE*$J(B RAID5 $B$N@-G=$C$F$I$s$J46$8$J$N$G$7$g$&$+(B?

$B0lJ}$G(B athlon $B$J$I$r%V%s2s$;$k(B software raid
(vinum $B$J$s$+$O(B RAID5 $B2DG=$G$9$h$M(B)$B$@$H$I$s$J@-G=$+!$(B
$B4J0W%Y%s%A%^!<%/$G$b$J$s$G$b$4B8$8$NJ}$O$$$i$C$7$c$$$^$9$G$7$g$&$+(B?

$B<j85$N(B "pdumpfs $B%5!<%P!<(B" (athlon(K7) 700MHz,256MB RAM, 4.7-stable)$B$K(B
MegaRAID i4 $B$rA^$7!$(B1$BBf(B/ch $B$G(B
 117800MB <IC35L120AVVA07-0> [239340/16/63]
 (IBM 120GXP; 7200rpm 2MB cache)
$B$r(B 4$BBf@\B3$7$F(B write through, cached I/O, 128KB block $B$N(B RAID5 $B$K(B
$B$7$F$_$^$7$?!%(B($B%+!<%I>e$O(B i960 100MHz w/ 16MB RAM $B$i$7$$(B)

$B$G!$(BRAID5 $B$G(B sequential I/O $B$N(B bench mark $B$ODL>o$O0UL#$,$J$$$N$O(B
$B=E!9>5CN$N$&$($GD64J0W%Y%s%A%^!<%/$H$7$F(B 1GB $B$N(B null write $B$r(B
	% cstream -o /Amrd0/null.bin -i - -b 2m -B 8m -n 1g -v 3
$B$J$s$F$d$k$H(B 3.24MB/s $B$H=P$^$9!%(B
(read $BB&$O(B 30MB/s $B$H$+(B 50MB/s $B$H$+=P$^$9(B)

RAID5 $B$N(B write $B$O(B max $B$G$bC1FH(B disk $BDxEY$N@-G=$G$"$k$HJ9$$$?$3$H$O(B
$B$"$k$N$GC1FH(B disk $B$N(B 1/2 $BDxEY$O=P$F$/$l$J$$$+$J!$$H(B
$B;W$C$F$$$?$N$G$9$,!$$3$l$[$ICY$$$H$O(B...

mirror $B$O$H$b$+$/(B RAID5 $B$N$h$&$JJ#;($J$b$N$K(B vinum $B$r(B
$B;H$&$N$O$A$g$C$Hm4m0$7$F$$$?$N$G$9$,!$(Bdisk server $B0J30$K$O(B
$B;HMQM=Dj$N$J$$%[%9%H$J$N$G(B software RAID5 $B$G@-G=$,(B
$BJ*@($/0c$&$N$G$"$l$P(B vinum $B$b8!F$$7$F$_$?$$$H;W$C$F$$$^$9!%(B

$B$b$7!$$I$J$?$+;29M%G!<%?$J$I$4B8$8$G$7$?$i65$($FD:$1$l$P9,$$$G$9!%(B


$B$A$J$_$K(B... RAID5 $B$K$O<e$$$O$:$N(B 3ware 7410 $B$G(B
Seagate Barracuda ATA IV(80GB) x3 $B$G$N(B
RAID5 plex $B$@$H(B 10.53MB/s $B$H=P$^$9(B(read $B$O(B 165MB/s)$B!%(B
$B$d$C$Q$j(B MegaRAID i4 $B$,<e$9$.$k$@$1$J$N$+$J(B...


$B;29M(B:
http://vmag.vwalker.com/series/testlab/art.asp?newsid=2033
http://www6.tomshardware.com/storage/02q4/021112/raid_controller-10.html

(vwalker $B8+$F$b!$(BMegaRAID i4 $B$O(B sequential I/O $B$K$O0[>o$J$^$G$K(B
$B<e$$$h$&$K8+$($^$9$M(B; random I/O $B$G$OIaDL$J$N$+$J(B)
-- 
       $B"J"J(B
Zzz.. (- - )$B"^"^"=!A(B           $B@n8}(B $B6d2O(B
      ##############   ginga-freebsd@ginganet.org
