From: Loic Dachary <loic@dachary.org>
To: Somnath Roy <Somnath.Roy@sandisk.com>,
ceph-devel <ceph-devel@vger.kernel.org>
Subject: Re: ceph-disk disk partition alignment
Date: Tue, 23 Feb 2016 12:11:49 +0700 [thread overview]
Message-ID: <56CBEA15.4090309@dachary.org> (raw)
In-Reply-To: <BN1PR02MB0555D538EB56A2908359F32F4A30@BN1PR02MB055.namprd02.prod.outlook.com>
Hi,
This not a ceph-deploy issue, rather a ceph-disk issue. Did you file an issue regarding this problem or would you like me to create one ? IIRC there are cases where sgdisk is not able to create a partition aligned as recommended (but parted could). Do you know anything about that ?
Cheers
On 23/02/2016 01:27, Somnath Roy wrote:
> Hi,
> I am seeing ceph-deploy is creating data partition from sector 1 ignoring what sgdisk is recommending (256 in my disk). Basically, it should be aligned with physical sector size (reported in /sys/block/<device>/queue/physical_block_size). In my case it is 16K physical and 4K logical...256 is perfectly fine as sgdisk/fdisk internally decides.
> Disk performance will be severely impacted because of partitioning this way from ceph-deploy , any reason why we are doing like this ?
> Thanks & Regards
> Somnath
>
--
Loïc Dachary, Artisan Logiciel Libre
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next prev parent reply other threads:[~2016-02-23 5:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-22 18:27 ceph-deploy disk partition alignment Somnath Roy
2016-02-23 5:11 ` Loic Dachary [this message]
2016-02-23 5:24 ` ceph-disk " Somnath Roy
2016-02-23 5:49 ` Loic Dachary
2016-02-23 7:09 ` Василий Ангапов
2016-02-23 16:52 ` Somnath Roy
2016-03-07 8:07 ` Ric Wheeler
2016-03-07 8:44 ` Loic Dachary
2016-02-23 12:12 ` ceph-deploy " Alfredo Deza
2016-02-23 16:58 ` Somnath Roy
-- strict thread matches above, loose matches on Subject: below --
2016-02-24 22:01 ceph-disk " Somnath Roy
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