From mboxrd@z Thu Jan  1 00:00:00 1970
From: Fyodor Ustinov <ufm@ufm.su>
Subject: Re: How to create new empty journal?
Date: Thu, 09 Jun 2011 13:19:04 +0300
Message-ID: <4DF09E18.5090006@ufm.su>
References: <4DEFF804.9010606@ufm.su> <1307614145.2906.2.camel@wido-desktop>
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To: Wido den Hollander <wido@widodh.nl>
Cc: ceph-devel@vger.kernel.org

On 06/09/2011 01:09 PM, Wido den Hollander wrote:
> Hi,
>
> On Thu, 2011-06-09 at 01:30 +0300, Fyodor Ustinov wrote:
>> Hi!
>>
>> I need to create new fresh journal for OSD server without removing data.
>> How?
> This can be done with:
>
> $ cosd -i<osdnum>  -c /etc/ceph/ceph.conf --mkjournal
Thanx!

> This will reset your journal.
>
> Why do you want to do this?
>

Many cases:

1. I have journal on tempfs and want to stop ceph cluster and restart 
servers. After that I lose journal.

2. I want to increase journal size.

3. I want to decrease journal size.

4. I want replace journal device.

And so on.

WBR,
     Fyodor.