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From: Martin Steigerwald <Martin@lichtvoll.de>
To: linux-btrfs@vger.kernel.org
Cc: Remco Hosman <remco@hosman.xs4all.nl>
Subject: Re: Very slow samba file transfer speed... any ideas ?
Date: Fri, 20 Jul 2012 14:58:11 +0200	[thread overview]
Message-ID: <201207201458.12018.Martin@lichtvoll.de> (raw)
In-Reply-To: <500923E5.6040609@hosman.xs4all.nl>

Am Freitag, 20. Juli 2012 schrieb Remco Hosman:
> > 11 really fast 15000rpm FC / SAS disks could possibly do 936 MB/s.
> > But regular 7200rpm SATA disks depending to the on disk location
> > might be as slow as 40-50 MB/s – just try fio disk-zone-profile on
> > one if you do not believe this – and then even with 11 disks 936
> > MB/s is out of reach.
> 
> My BTRFS array consists of 5 WD Green 2T disks. each of them goes a
> bit  over 100MB/sec on sequential read/write.

I tested 2 WD Green 1,5 TB and each of them goes about 90-100 MB/s at the 
beginning of the disk and about 40-50 MB/s at the end of the disk.

So did you run fio disk-zone-profile on the whole disk and made a graph?

If not, I do not believe your figures.

Thanks,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7

      parent reply	other threads:[~2012-07-20 12:58 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-19  1:42 Very slow samba file transfer speed... any ideas ? Shavi N
2012-07-19  2:00 ` Bernhard Redl
2012-07-19 11:04   ` Martin Steigerwald
2012-07-19 12:39     ` Shavi N
2012-07-19 12:43       ` Fajar A. Nugraha
2012-07-19 14:19       ` Martin Steigerwald
2012-07-19 22:09         ` Shavi N
2012-07-20  9:15           ` Martin Steigerwald
2012-07-20  9:24             ` Remco Hosman
2012-07-20 10:23               ` Shavi N
2012-07-20 12:19                 ` Fajar A. Nugraha
2012-07-20 12:58               ` Martin Steigerwald [this message]

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