Re: problems creating new ceph cluster when using journal on block device

[Mark Kirkwood <mark.kirkwood@catalyst.net.nz>]

On 08/11/12 21:08, Wido den Hollander wrote:
>
>
> On 08-11-12 08:29, Travis Rhoden wrote:
>> Hey folks,
>>
>> I'm trying to set up a brand new Ceph cluster, based on v0.53.  My
>> hardware has SSDs for journals, and I'm trying to get mkcephfs to
>> intialize everything for me. However, the command hangs forever and I
>> eventually have to kill it.
>>
>> After poking around a bit, it's clear that the problem has something
>> to do with the journal.  If I comment out the journal in ceph.conf,
>> the commands proceed just find.  This is the first time I've tried to
>> throw a journal on a block device rather than a file, so maybe I've
>> done something wrong with that.
>>
>> Here is the info from ceph.conf:
>>
>>
>> [osd]
>>          osd journal size = 4000
>
> Not sure if this is the problem, but when using a block device you don't
> have to specify the size for the journal.

Also might be useful to know make/model of ssd, plus motherboard 
make/model (in case commenting out size does not fix)!

Regards

Mark