Date: Wed, 7 Dec 2005 20:40:50 +0100 From: "OxY" <oxy@field.hu> To: <freebsd-geom@freebsd.org> Cc: Pawel Jakub Dawidek <pjd@FreeBSD.org> Subject: Re: geom mirror write performance problem Message-ID: <002201c5fb66$23235040$0201a8c0@oxy>
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it's weird, but after the array is synced i ran Sco root# swapoff /dev/mirror/gm0s2b Sco root# dd if=/dev/zero of=/dev/mirror/gm0s2b bs=1m count=1000 dd: /dev/mirror/gm0s2b: short write on character device dd: /dev/mirror/gm0s2b: end of device 507+0 records in 506+1 records out 530972160 bytes transferred in 19.987893 secs (26564689 bytes/sec) it's fast on swap partition, while raid is complete...still slow on other partitions... ----- Original Message ----- From: "OxY" <oxy@field.hu> To: "Pawel Jakub Dawidek" <pjd@FreeBSD.org> Cc: <freebsd-geom@freebsd.org> Sent: Wednesday, December 07, 2005 7:39 PM Subject: Re: geom mirror write performance problem > Sco root# gmirror remove gm0 ad2 > Sco root# swapoff /dev/mirror/gm0s2b > Sco root# dd if=/dev/zero of=/dev/ad2s1b bs=1m count=1000 > dd: /dev/ad2s1b: Operation not supported > Sco root# dd if=/dev/zero of=/dev/ad2s2b bs=1m count=1000 > dd: /dev/ad2s2b: short write on character device > dd: /dev/ad2s2b: end of device > 507+0 records in > 506+1 records out > 530972160 bytes transferred in 18.206418 secs (29164011 bytes/sec) > Sco root# dd if=/dev/zero of=/dev/mirror/gm0s2b bs=1m count=1000 > dd: /dev/mirror/gm0s2b: short write on character device > dd: /dev/mirror/gm0s2b: end of device > 507+0 records in > 506+1 records out > 530972160 bytes transferred in 19.109501 secs (27785768 bytes/sec) > >>Actually it is possible... You said, when only one component is >>connected performance is fine. >>You can try something like this: >> >># gmirror remove gm0 ad2 >># swapoff /dev/mirror/gm0s1b (if you have one) > > ----- Original Message ----- > From: "Pawel Jakub Dawidek" <pjd@FreeBSD.org> > To: "OxY" <oxy@field.hu> > Cc: <freebsd-geom@freebsd.org> > Sent: Wednesday, December 07, 2005 7:08 PM > Subject: Re: geom mirror write performance problem > >
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