From: Ingo Franzki <ifranzki@linux.ibm.com>
To: Bernd Eckenfels <ecki@zusammenkunft.net>,
LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] Filesystem corruption with LVM's pvmove onto a PVwith a larger physical block size
Date: Fri, 1 Mar 2019 09:00:36 +0100 [thread overview]
Message-ID: <7d5474d4-a7f5-0321-1acb-fe1a5f1dbd19@linux.ibm.com> (raw)
In-Reply-To: <5c789f6a.1c69fb81.bdd85.c1bb@mx.google.com>
On 01.03.2019 03:56, Bernd Eckenfels wrote:
> Hello,
>
> I think the filesystems address in Logical blocks, so this is the size which should match.
>
> However the physical size might be relevant for alignment/sizing decisions of mkfs (but you would expect the to be encoded in the metadata of the filesystem so you can transport them (losing proper alignment which might affect Performance or robustness).
>
> For ext3/4 I think the mkfs will use -b 4k by Default if your FS is at least 0,5GB.
That may make a difference. My tests were with relatively small volumes, so it might not be using -b 4k due to the size of the volume?
>
> BTW: some applications (like SQL Server) also care about the physical size to make sure they always write complete sectors in transactions and avoid read-modify-write scenarios.
>
> Gruss
> Bernd
>
--
Ingo Franzki
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next prev parent reply other threads:[~2019-03-01 8:00 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-25 15:33 [linux-lvm] Filesystem corruption with LVM's pvmove onto a PV with a larger physical block size Ingo Franzki
2019-02-27 0:00 ` Cesare Leonardi
2019-02-27 8:49 ` Ingo Franzki
2019-02-27 14:59 ` Stuart D. Gathman
2019-02-27 17:05 ` Ingo Franzki
2019-03-02 1:37 ` L A Walsh
2019-02-28 1:31 ` Cesare Leonardi
2019-02-28 1:52 ` Stuart D. Gathman
2019-02-28 8:41 ` Ingo Franzki
2019-02-28 9:48 ` Ilia Zykov
2019-02-28 10:10 ` Ingo Franzki
2019-02-28 10:41 ` Ilia Zykov
2019-02-28 10:50 ` Ilia Zykov
2019-02-28 13:13 ` Ilia Zykov
2019-03-01 1:24 ` Cesare Leonardi
2019-03-01 2:56 ` [linux-lvm] Filesystem corruption with LVM's pvmove onto a PVwith " Bernd Eckenfels
2019-03-01 8:00 ` Ingo Franzki [this message]
2019-03-01 3:41 ` [linux-lvm] Filesystem corruption with LVM's pvmove onto a PV with " Stuart D. Gathman
2019-03-01 7:59 ` Ingo Franzki
2019-03-01 8:05 ` Ingo Franzki
2019-03-02 1:36 ` Cesare Leonardi
2019-03-02 20:25 ` Nir Soffer
2019-03-04 22:45 ` Cesare Leonardi
2019-03-04 23:22 ` Nir Soffer
2019-03-05 7:54 ` Ingo Franzki
2019-03-04 9:12 ` Ingo Franzki
2019-03-04 22:10 ` Cesare Leonardi
2019-03-05 0:12 ` Stuart D. Gathman
2019-03-05 7:53 ` Ingo Franzki
2019-03-05 9:29 ` Ilia Zykov
2019-03-05 11:42 ` Ingo Franzki
2019-03-05 16:29 ` Nir Soffer
2019-03-05 16:36 ` David Teigland
2019-03-05 16:56 ` Stuart D. Gathman
2019-02-28 14:36 ` Ilia Zykov
2019-02-28 16:30 ` Ingo Franzki
2019-02-28 18:11 ` Ilia Zykov
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