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From: Patrick Dung <patrick_dkt@yahoo.com.hk>
To: Steven Hartland <killing@multiplay.co.uk>
To: Ivailo.TANUSHEFF@raiffeisen.bg <Ivailo.TANUSHEFF@raiffeisen.bg>
To: Michael Schmiedgen <schmiedgen@gmx.net>
Cc: owner-freebsd-fs@freebsd.org <owner-freebsd-fs@freebsd.org>
Cc: freebsd-fs@freebsd.org <freebsd-fs@freebsd.org>
Cc: pgsql-admin@postgresql.org <pgsql-admin@postgresql.org>
Cc: freebsd-jail@freebsd.org <freebsd-jail@freebsd.org>
Subject: Re: ZFS-FreeBSD + postgresql performance
Date: Sat, 26 Oct 2013 13:24:23 +0800 (SGT)
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On , Patrick Dung <patrick_dkt@yahoo.com.hk> wrote:
 


On Saturday, October 26, 2013 1:04 AM, Steven Hartland <killing@multiplay.co.uk> wrote:
 
----- Original Message ----- 
From: "Patrick Dung" <patrick_dkt@yahoo.com.hk>
Sent: Friday, October 25, 2013 4:53 PM
Subject: Re: [ADMIN] ZFS-FreeBSD + postgresql performance


>> I would also recommend to use 4K sector size
 using
>
> gnop and zpool export/import.

This will have no effect, the ashift for a pool is set at creation.

    Regards
    Steve


---------------------

To be specific, I think the steps should be gnop create, create zfs pool, export zfs, remove gnop and reimport zfs.
This link have the deatils and steps:
The link is:

http://ivoras.sharanet.org/blog/tree/2011-01-01.freebsd-on-4k-sector-drives.html


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