[Linux-cluster] SEMI OT. Synchronizing jboss cache dir.

[Juan Ramon Martin Blanco]

On Tue, Sep 1, 2009 at 1:05 PM, ESGLinux <esggrupos at gmail.com> wrote:

>
>
> 2009/9/1 Juan Ramon Martin Blanco <robejrm at gmail.com>
>
>>
>>
>> On Tue, Sep 1, 2009 at 12:38 PM, ESGLinux <esggrupos at gmail.com> wrote:
>>
>>> Hi All,
>>> First, sorry if this can be considered Off Topic but my first aproach was
>>> using clustering to my problem so I suposse you could have the same problem.
>>>
>>> I have 2 computers running JBoss and I need to share a directory for the
>>> cache (I use OSCache).
>>>
>>> First I try to use a NFS service on a Red hat Cluster ( I use this
>>> reference
>>> http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Configuration_Example_-_NFS_Over_GFS/index.html
>>> )
>>>
>>
>> Do you have a shared storage? If the answer is yes, just use gfs and mount
>> the filesystem on both machines.
>>
>>
> Nop, I haven´t but your answer makes me a new question. Can I use GFS
> directly without making a cluster?
> I mean can I attach the iSCSI devices for example, and mount a GFS
> filesystem on it without creating a cluster, and a service asociated to this
> GFS filesystem?
>
You should use one iscsi lun shared by both cluster nodes. You can mount a
GFS filesystem without locking (lock=nolock) with (correct me if I am wrong)
the node not being part of a cluster, but only in one node at a time.
You can mount a GFS filesystem created for a certain cluster  without having
the filesystem configured as a resource, the only requisite is that the
nodes mounting the filesystem have to be part of that certain cluster.

Regards,
Juanra

>
>
> Thanks
>
> ESG
>
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