Re: Get Confuse on N-Way & Mirror Mode Replication

["Chris G. Sellers" <chris.sellers@nitle.org>]

I thought N-Way was true multimaster and not a hot standby method ?    
MultiMaster Mirror Mode is mirroring of the data, likeRAID 1.  The  
data is written to one and mirrored to the other, no matter which unit  
in the one or the other.   However, you can't have two writes to  
record X at the same time on both systems .

N-Way handles that I thought?  (now that I think about I guess I don't  
see specifics documented anywhere on how it does that ?))

Sellers

On Jan 7, 2008, at 11:48 AM, Buchan Milne wrote:

> On Monday 07 January 2008 05:10:25 Data Leung wrote:
> > Dear List ,
> >        I am testing on Openldap-2.4.7 multi-master replication ,  
> > and I had
> > been read Openldap Admin page for a while already ( URL :
> > http://www.openldap.org/doc/admin24/replication.html#delta-syncrepl%20repli
> > cation )
> >
> >
> > Now I get confuse on " N-Ray Multi-Master " & " Mirror Mode Multi- 
> > Master "
> > Hope somebody else could help.
>
> The primary difference between N-Way Multi-Master and Mirror Mode is  
> that
> Mirror Mode is limited to two masters. Thus, it seems only N-Way is  
> suitable
> for you. However, I would have considered a configuration with 3  
> masters (to
> reduce the network traffic, while still allowing each site to write,  
> and
> having read redundancy in the site).
>
> Regards,
> Buchan

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Chris G. Sellers			|	NITLE Technology
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