From: Marian Csontos <mcsontos@redhat.com>
To: LVM general discussion and development <linux-lvm@redhat.com>,
Daniel Janzon <daniel.janzon@edgeware.tv>
Subject: Re: [linux-lvm] Best way to run LVM over multiple SW RAIDs?
Date: Mon, 9 Dec 2019 15:26:04 +0100 [thread overview]
Message-ID: <85c8a1e5-946b-cb38-87b6-90e46be7de6a@redhat.com> (raw)
In-Reply-To: <A8A53B0E4B7ACF4BAD5C77D3671AC8976ABE90D8@EX01.edgeware.tv>
On 12/9/19 11:26 AM, Daniel Janzon wrote:
>
> The origin of my problem is indeed the poor performance of RAID5,
> which maxes out the single core the driver runs on. But if I accept that
> as a given, the next problem is LVM striping. Since I do get 10x better
What stripesize was used for striped LV? IIRC the default is 64k.
IIUC you are serving mostly large files. I have no numbers, and no HW to
test the hypothesis, but using larger stripesize could help here as this
would split the load on multiple RAID5 volumes, while not splitting the
IOs too early into too many small requests.
-- Marian
next prev parent reply other threads:[~2019-12-09 14:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-09 10:26 [linux-lvm] Best way to run LVM over multiple SW RAIDs? Daniel Janzon
2019-12-09 14:26 ` Marian Csontos [this message]
2019-12-10 11:23 ` Gionatan Danti
2019-12-10 21:29 ` John Stoffel
-- strict thread matches above, loose matches on Subject: below --
2019-12-16 8:22 Daniel Janzon
2019-10-29 8:47 Daniel Janzon
2019-12-07 16:16 ` Anatoly Pugachev
2019-12-07 17:37 ` Roberto Fastec
2019-12-07 20:34 ` Stuart D. Gathman
2019-12-07 22:44 ` John Stoffel
2019-12-07 23:14 ` Stuart D. Gathman
2019-12-08 11:57 ` Gionatan Danti
2019-12-08 22:51 ` John Stoffel
2019-12-09 10:40 ` Guoqing Jiang
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