> On 1 Oct 2020, at 05:25, Paul Whitney <[email protected]> wrote:
> 
> Hi Eugen,
> 
> I think that is what was tested by Red Hat and not necessarily a hard limit.

Correct, however Red Hat also tested up to 60 for FreeIPA. Certainly I know 
there is a deployment in the world that has scaled up past 1000 servers. 

Generally once you get past say 8 servers, you need to think about your 
replication topology and how the data will flow. The largest sites I know tend 
to go to maximum 8 write-accepting servers, and then replicate to N hubs and 
replicas that are read only past that for the best performance and reliability. 

> 
> Regards,
> 
> 
> Paul M. Whitney
> [email protected]
> 
> 
> Sent from my Mac Book Pro
> 
>> On Sep 30, 2020, at 9:56 AM, Eugen Lamers <[email protected]> 
>> wrote:
>> 
>> Hi,
>> We use the 389 Directory Server version 1.4.2.15. 
>> In the documentation of the Red Hat Directory Server it says, as many as 20 
>> masters are supported in an MMR. It sounds to be a hardcoded limitation 
>> defined to avoid overloaded servers and network. Shouldn't it be depending 
>> on the MMR topology, i.e. rather on the total number of replication 
>> agreements within the whole scenario? Or does "20 masters" indeed mean that 
>> the limitation of the MMR topology is the number of 380 replication 
>> agreements as shown in the "fully connected mesh" scenario 
>> (https://access.redhat.com/documentation/en-us/red_hat_directory_server/10/html/deployment_guide/designing_the_replication_process-common_replication_scenarios)
>>  with 20 masters and 20x19 replication agreements?
>> Is there someone who possibly has experience with scenarios of more than 20 
>> master servers?
>> Thanks,
>> Eugen
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—
Sincerely,

William Brown

Senior Software Engineer, 389 Directory Server
SUSE Labs, Australia
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