From: Martin Steigerwald <Martin@lichtvoll.de>
To: linux-btrfs@vger.kernel.org, 0bo0 <0.bugs.only.0@gmail.com>
Subject: Re: does btrfs have RAID I/O throughput (un)limiting sysctls, similar to md?
Date: Sun, 7 Feb 2010 12:48:20 +0100 [thread overview]
Message-ID: <201002071248.20721.Martin@lichtvoll.de> (raw)
In-Reply-To: <c67eed301002060648p436a7347w3c7189e385ed79bc@mail.gmail.com>
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Am Samstag 06 Februar 2010 schrieben Sie:
> On Sat, Feb 6, 2010 at 5:10 AM, Daniel J Blueman
>
> <daniel.blueman@gmail.com> wrote:
> > These proc entries affect just array reconstruction, not general I/O
> > performance/throughput, so affect just an edge-case of applications
> > requiring maximum latency/minimum throughout guarantees.
>
> although i'd 1st seen the perf hit at the (re)construction stage, i
> didn't recognize that the sysctls were limited to that case.
Limiting rebuild throughput helps to have productively running
applications getting their share of I/O during RAID rebuilds.
> so, iiuc, btrfs has no such issues?
Issues? I would call that a feature, not an issue.
--
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7
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prev parent reply other threads:[~2010-02-07 11:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-06 0:37 does btrfs have RAID I/O throughput (un)limiting sysctls, similar to md? 0bo0
2010-02-06 13:10 ` Daniel J Blueman
2010-02-06 14:48 ` 0bo0
2010-02-07 11:48 ` Martin Steigerwald [this message]
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