Multimaster replication + one way replication Q

[Ghiurea, Isabella]

Hi List
I am running a multimaster master  fractional replication (M1, M2 host) with memberof plugin excluded from replication, I am looking  to add 1/2 
dozen DS's  to replication system but ALL   will be read only ( master 
-> slave  replication cfg-one way replication) what will be my options
for cfg replication
-should I consider using M1 or M2 as master wich will replicate to each slave , so  the master M2  will have 6  replcation agreements to each slave host -or -should I consider the cascading replication option one slave  gets data from Master DS and from this slave next one replicates and so on ?
which one of this designs cfg replication solution will give the best performance?

Thank you
Isabella

[William Brown]

On Fri, 2017-09-29 at 12:05 -0400, Ghiurea, Isabella wrote:
> Hi List
> I am running a multimaster master  fractional replication (M1, M2 host) with memberof plugin excluded from replication, I am looking  to add 1/2 
> dozen DS's  to replication system but ALL   will be read only ( master 
> -> slave  replication cfg-one way replication) what will be my options
> for cfg replication

When you say "cfg replication", do you mean replication of the
cn=config?
> -should I consider using M1 or M2 as master wich will replicate to each slave , so  the master M2  will have 6  replcation agreements to each slave host -or -should I consider the cascading replication option one slave  gets data from Master DS and from this slave next one replicates and so on ?

I would approach this differently.

I would disable fractional replication. These days you *want* to
replicate member-of attrs, it doesn't do any harm. Fractional
replication does more harm tbh.

I would setup M1 <-> M2, and then have M1 and M2 connect to each slave.
So that in the case say M1 is down, all slaves are still updated
correctly.

The *only* reason to use fractional repl is referential integrity, and
only with a delayed mode - which I don't advise (refint delay should
always be 0).
> which one of this designs cfg replication solution will give the best performance?

What do you mean by "performance"? As in latency between a write and
appearing on a slave? Or parallel read performance?

Hope this helps,
> Thank you
> Isabella
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William , thank you for feedback ,  2 years ago when I set up 389-DS multi-mater replication with Memberof plugin I was advised by people on this list to use fractional replication (we were seeing strange behavior)  : to exclude Memberof plugin from replication,  your  reply  here mentioned I do not need that  anymore , is this  correct ? I am a bit confuse , if I should reconsider my replication configuration and use full replication for multi -master ?
 Here is my  present 389-DS version , your feedback much appreciate!
389-ds-base-libs-1.3.5.15-1.fc24.x86_64
389-ds-base-1.3.5.15-1.fc24.x86_64

[Mark Reynolds]

On 10/04/2017 12:43 PM, [e-mail] wrote:
> William , thank you for feedback ,  2 years ago when I set up 389-DS multi-mater replication with Memberof plugin I was advised by people on this list to use fractional replication (we were seeing strange behavior)

Correct, you should use fractional replication if you are using memberOf
in a MMR env:

https://access.redhat.com/documentation/en-us/red_hat_directory_server/10/ht...
> : to exclude Memberof plugin from replication,  your  reply  here mentioned I do not need that  anymore , is this  correct ? I am a bit confuse , if I should reconsider my replication configuration and use full replication for multi -master ?
>  Here is my  present 389-DS version , your feedback much appreciate!
> 389-ds-base-libs-1.3.5.15-1.fc24.x86_64
> 389-ds-base-1.3.5.15-1.fc24.x86_64
> _______________________________________________
> 389-users mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]

[carne_de_passaro]

We have 19 master servers and more than 150 slave servers replicating with
each other and all replication agreements are full replication, but only
one master server have the memberof plugin activated. We never have a
problem with this.

Em 4 de out de 2017 2:17 PM, "Mark Reynolds"  escreveu:

On 10/04/2017 12:43 PM, [e-mail] wrote:
> William , thank you for feedback ,  2 years ago when I set up 389-DS

multi-mater replication with Memberof plugin I was advised by people on
this list to use fractional replication (we were seeing strange behavior)

Correct, you should use fractional replication if you are using memberOf
in a MMR env:

https://access.redhat.com/documentation/en-us/red_hat_
directory_server/10/html/administration_guide/advanced_
entry_management#memberof-topology
> : to exclude Memberof plugin from replication,  your  reply  here

mentioned I do not need that  anymore , is this  correct ? I am a bit
confuse , if I should reconsider my replication configuration and use full
replication for multi -master ?
> Here is my  present 389-DS version , your feedback much appreciate!
> 389-ds-base-libs-1.3.5.15-1.fc24.x86_64
> 389-ds-base-1.3.5.15-1.fc24.x86_64
> _______________________________________________
> 389-users mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]

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