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From: Marcin Sura <mailing-lists@sura.pl>
To: Eric Sandeen <sandeen@sandeen.net>
Cc: linux-xfs@vger.kernel.org
Subject: Re: Can I add external log device after filesystem was created?
Date: Thu, 3 Nov 2016 22:14:14 +0100	[thread overview]
Message-ID: <CACNifpV7qQ_5YzJJfdaKi3SThBa7x4N=VNeK1f_OkijiXh6zPA@mail.gmail.com> (raw)
In-Reply-To: <1e60fac5-f2b9-3903-c18c-0a73d0206e0a@sandeen.net>

Hi,

We are building huge test system with hundreds TB of data. We want to
execute some performance tests without and with external log device.
Filling in the data is a time consuming process, so my first idea was
to create the filesystem without external log, execute the tests and
then add external log and repeat the tests without recreating the
filesystem. Now I know I have to do this. Thanks

BR
Marcin

2016-11-03 20:57 GMT+01:00 Eric Sandeen <sandeen@sandeen.net>:
> On 11/3/16 2:28 PM, Marcin Sura wrote:
>> Hi,
>>
>> I've created filesystem with default mkfs.xfs command, started to use
>> the filesystem. Few days later I've got nice SSD-based lun which can
>> be used as external log device.
>>
>> Can I add that lun as external log device to an existing filesystem? How?
>>
>> BR
>> Marcin
>
> There is no supported mechanism for doing this.  It can be done with xfs_db
> disk-editing surgery, but that's not really recommended.
>
> What is your reason for wanting to move the log?
>
> -Eric

  reply	other threads:[~2016-11-03 21:14 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-03 19:28 Can I add external log device after filesystem was created? Marcin Sura
2016-11-03 19:57 ` Eric Sandeen
2016-11-03 21:14   ` Marcin Sura [this message]
2016-11-04  0:37     ` Eric Sandeen

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