From: Bastian Blank <bblank@thinkmo.de>
To: linux-lvm@redhat.com
Subject: Re: [linux-lvm] raid0 - no performance increase??
Date: Sun, 11 Oct 2020 22:15:33 +0200 [thread overview]
Message-ID: <20201011201533.waxeyvbrp6cjdi2z@shell.thinkmo.de> (raw)
In-Reply-To: <269f632e-591e-56c3-a3be-31ac6060f73f@yahoo.co.uk>
On Sat, Oct 10, 2020 at 05:52:32PM +0100, lejeczek wrote:
> I have a simple raid0 lvm comprising of two NVME devices.
> I'd expect performance of such a volume to be higher than a
> "regular" volume ran of a single NVME, but simple dbench
> shows such raid0 volume to the same "slow" as a single NVME
> volume.
Why do you think? What is dbench anyway? Linear access is not going to
be faster, as it is dominated by latency. Please use fio with _random_
reads or writes and a useful queue depth.
Also, what do you mean with slow? 500k IOPS?
Bastian
--
War is never imperative.
-- McCoy, "Balance of Terror", stardate 1709.2
prev parent reply other threads:[~2020-10-11 20:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <269f632e-591e-56c3-a3be-31ac6060f73f.ref@yahoo.co.uk>
2020-10-10 16:52 ` [linux-lvm] raid0 - no performance increase?? lejeczek
2020-10-11 20:15 ` Bastian Blank [this message]
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