From: Sander <sander@humilis.net>
To: Richard Sharpe <realrichardsharpe@gmail.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Tuning of btrfs for throughput?
Date: Tue, 31 Jan 2012 08:08:03 +0100 [thread overview]
Message-ID: <20120131070803.GA24017@attic.humilis.net> (raw)
In-Reply-To: <CACyXjPxb3Ped7yvv5je_g76T+uDKKYkhC7t7MY_-GQK3WuTQ-Q@mail.gmail.com>
Richard Sharpe wrote (ao):
> I am running on 3.2.1 and have set up btrfs across 11 7200RPM 1TB 3.5"
> drives. I told btrfs to mirror metadata and stripe data.
> However, what I would like to know is are there any tuning parameters
> I can tweak to push the numbers up a bit?
>
> I see lots of idle time (80+%) on my 16 cores (probably two by four by two).
Do you have a partition on the disks? On a partitionless disk you don't
have to deal with aligning.
You could try mkfs.btrfs -l 32k -n 32k as per
http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg14585.html
Depending on the nature of your data, you could try with zlib, lzo or
snappy compression.
I'd say dd is a lousy benchmarktool btw.
Sander
--
Humilis IT Services and Solutions
http://www.humilis.net
next prev parent reply other threads:[~2012-01-31 7:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-30 19:35 Tuning of btrfs for throughput? Richard Sharpe
2012-01-31 7:08 ` Sander [this message]
2012-01-31 8:59 ` Duncan
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