[Fedora-directory-users] multi-master limit

[Rich Megginson]

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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