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Posted to users@jackrabbit.apache.org by "Andrea K." <ak...@alteanet.it> on 2007/06/18 09:00:53 UTC

Re: Clustering documentation

Hi Dominique,
just another question about JR clustering. Everything is working, but I want
to know if
the cluster could be used with ExternalBLOB feature "enabled" or is a must
having binaries
in db blobs.

Thanks in advance.

Bye,
Andrea -


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Re: Clustering documentation

Posted by "Andrea K." <ak...@alteanet.it>.
So, is there a way to control/configure JackRabbit cache (talking about
filesystem blob cache) and
tune the service?

Thanks again.

Bye,
Andrea -


Dominique Pfister wrote:
> 
> Hi Andrea,
> 
> It is a must. The journal - whether stored in a file or in the
> database - does not contain the actual data but only the information
> about what items did change. This implies that the BLOB storage must
> be visible to all nodes in the cluster. Further on, changes to this
> storage must be transactionally safe, e.g. changes made by one node in
> the cluster may only be visible to all other nodes AFTER the change
> has been committed.
> 
> Kind regards
> Dominique
> 
> On 6/18/07, Andrea K. <ak...@alteanet.it> wrote:
>>
>> Hi Dominique,
>> just another question about JR clustering. Everything is working, but I
>> want
>> to know if
>> the cluster could be used with ExternalBLOB feature "enabled" or is a
>> must
>> having binaries
>> in db blobs.
>>
>> Thanks in advance.
>>
>> Bye,
>> Andrea -
>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Clustering-documentation-tf3703496.html#a11170805
>> Sent from the Jackrabbit - Users mailing list archive at Nabble.com.
>>
>>
> 
> 

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View this message in context: http://www.nabble.com/Clustering-documentation-tf3703496.html#a11171879
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Re: Clustering documentation

Posted by Dominique Pfister <do...@day.com>.
Hi Andrea,

It is a must. The journal - whether stored in a file or in the
database - does not contain the actual data but only the information
about what items did change. This implies that the BLOB storage must
be visible to all nodes in the cluster. Further on, changes to this
storage must be transactionally safe, e.g. changes made by one node in
the cluster may only be visible to all other nodes AFTER the change
has been committed.

Kind regards
Dominique

On 6/18/07, Andrea K. <ak...@alteanet.it> wrote:
>
> Hi Dominique,
> just another question about JR clustering. Everything is working, but I want
> to know if
> the cluster could be used with ExternalBLOB feature "enabled" or is a must
> having binaries
> in db blobs.
>
> Thanks in advance.
>
> Bye,
> Andrea -
>
>
> --
> View this message in context: http://www.nabble.com/Clustering-documentation-tf3703496.html#a11170805
> Sent from the Jackrabbit - Users mailing list archive at Nabble.com.
>
>