Fedora directory users - Dec 2007 - multi-master limit

Hi all,

New to FedoraDS.  I''m doing some research for an upcoming application
that will require LDAP.
This App will consist of multiple servers (10 or more) in different geographical
locations.
Each server will authenticate against itself and serve its own local data.  
The full LDAP directory needs to be replicated across all servers so that users
can login to any server.

I''ve read that there is a limit of 4 writable servers in multi-master
replication.  Is this a hard limit or a soft (reccomendation) limit?
The application will need to write changes directly to itself on all servers so
that they are immediately available locally, then replicated to other servers.

Is this possible with FedoraDS?

Thanks in advance!

Beavrz1




     
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Jason Beavers wrote:
> Hi all,
>
> New to FedoraDS.  I''m doing some research for an upcoming
application
> that will require LDAP.
> This App will consist of multiple servers (10 or more) in different 
> geographical locations.
> Each server will authenticate against itself and serve its own local 
> data. 
> The full LDAP directory needs to be replicated across all servers so 
> that users can login to any server.
>
> I''ve read that there is a limit of 4 writable servers in
multi-master
> replication.  Is this a hard limit or a soft (reccomendation) limit?
That means 4 is the highest number of masters we''ve tested 
exhaustively.  The protocol supports up to 2^32-2 masters, but you will 
usually hit a practical limit in the number of replication agreements.  
Each repl. agreement runs a separate thread, so you will usually be 
constrained by resources - available RAM, processors,
etc.
> The application will need to write changes directly to itself on all 
> servers
The application will write the changes directly to each of the 10
masters?
> so that they are immediately available locally, then replicated to 
> other servers.
>
> Is this possible with FedoraDS?
Yes, it is possible.
>
> Thanks in advance!
>
> Beavrz1
>
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