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Date:      Fri, 29 Dec 2006 15:16:36 +0100
From:      Ivan Voras <ivoras@fer.hr>
To:        freebsd-geom@freebsd.org
Subject:   Re: gstripe performance scaling with many disks
Message-ID:  <en380a$tl7$1@sea.gmane.org>
In-Reply-To: <20061229120517.GA12877@qlovarnika.bg.datamax>
References:  <20061228171858.GA11296@qlovarnika.bg.datamax> <20061229120517.GA12877@qlovarnika.bg.datamax>

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Vasil Dimov wrote:

> Here is what further tests showed:

> This are gstat screen shots during the test:
>=20
> 1 drive:
> dT: 0.501s  w: 0.500s
>  L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w   %busy Name
>     8     12     12   1003  548.1      0      0    0.0   96.6| ggate100=


> 8 drives:
> dT: 0.501s  w: 0.500s
>  L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w   %busy Name
>     6    116    116   1028   63.4      0      0    0.0   97.6| ggate100=


> 17 drives:
> dT: 0.563s  w: 0.500s
>  L(q)  ops/s    r/s   kBps   ms/r    w/s   kBps   ms/w   %busy Name
>     5    185    178    848   18.9      0      0    0.0   88.8| ggate100=


Ok, so ops/s is increasing but it's not conclusive. Does anyone know how
to get KB/t stats for synthetic geom devices?




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