Date: Wed, 7 Mar 2007 22:29:42 +0300 From: "Artem Kuchin" <matrix@itlegion.ru> To: <freebsd-stable@freebsd.org>, "Ivan Voras" <ivoras@fer.hr> Cc: freebsd-geom@freebsd.org Subject: Re: Some Unix benchmarks for those who are interesed Message-ID: <001601c760ee$f76fa300$0c00a8c0@Artem> References: <20070306020826.GA18228@nowhere> <45ECF00D.3070101@samsco.org><20070306050312.GA2437@nowhere><008101c75fcc$210c74a0$0c00a8c0@Artem> <esk9vq$uhh$1@sea.gmane.org><001a01c7601d$5d635ee0$0c00a8c0@Artem> <eskka8$adn$1@sea.gmane.org><001801c7603a$5339e020$0c00a8c0@Artem> <eskpd1$sm4$1@sea.gmane.org> <20070307105144.1d4a382f@daydream.goid.lan><002801c760e2$5cb5eb50$0c00a8c0@Artem> <esmvnp$khs$1@sea.gmane.org><005b01c760e6$9a798bf0$0c00a8c0@Artem> <esn2s6$1i9$1@sea.gmane.org>
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>>Artem Kuchin wrote: >> Hmm. what kind of HDD, RAID or whatever are you using? >> My raid pretty much sucks. It is build it on the intel motherboard >> LSI Megaraid. But i still get 81Mb/sec when doing >> dd if=/dev/ar0 of=/dev/null bs=1M >> >> How much do you get on this? > >geom_mirror on 2 desktop SATA drives, but the results of dd are pretty low: > ># dd if=/dev/mirror/data of=/dev/null bs=1m count=1000 >1000+0 records in >1000+0 records out >1048576000 bytes transferred in 17.817686 secs (58850290 bytes/sec) > >As you can see, results with a single drive are better: > ># dd if=/dev/ad4 of=/dev/null bs=1m count=1000 >1000+0 records in >1000+0 records out >1048576000 bytes transferred in 16.219518 secs (64649023 bytes/sec) Now i am lost. i get 81MB/sec on dd but still you get File Copy 1024 bufsize 2000 maxblocks 3960.0 159513.0 402.8 and i get File Copy 1024 bufsize 2000 maxblocks 3960.0 109313.0 276.0 The drives i use are Seagate 7200.10 (320Gb, SATA II, 16MB cache with perpendicular heads) How is it possible that you get 2x file copy perfomance ? What's the matter?! -- Artem
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