Copying data between clusters

Mårten Gustafson marten.gustafson at
Sun May 9 07:13:08 EDT 2010

N-val is configurable through default bucket props.

AFAIK there's currently no way change server defaults for R, W and DW.


On 8 maj 2010, at 20.27, Alan McConnell <alanmc at> wrote:

> Thanks Kevin,
> Is there a way to set a default N (and R/W) value across a cluster  
> via configuration?  I know there's a default_props feature in  
> configuration but I don't know if it's possible to use that for  
> default N/R/W values and I don't know what the syntax is.
> In case anyone was wondering I went ahead and tried a backup/restore  
> between production and test and it worked just fine.  Restoring from  
> a backup file will work across different clusters.
> On Fri, May 7, 2010 at 9:17 PM, Kevin Smith <ksmith at> wrote:
> Alan -
> I can't answer your replication questions -- don't have a lot of  
> experience with it yet -- but I can take a stab at setting the  
> global replication setting.
> If I'm understanding correctly I believe you're referring to the N  
> value. N controls how many replicas of an entry Riak stores, in  
> total, around the cluster. Docs on tuning this value can be found  
> here:
> --Kevin
> On May 7, 2010, at 10:06 PM, Alan McConnell wrote:
> >       • Is it possible to use the built-in backup/restore function 
> s of riak-admin to copy data between clusters?  The scenario is that 
>  we have separate test and production environments, each with separa 
> te riak clusters of different sizes and configurations.  Every so of 
> ten we'd like to copy the data from production into test.  Can I run 
>  'backup all' in prod, then run restore on the resultant file in tes 
> t, and have everything work?  Or does restore only work on the same  
> cluster configuration that the backup was performed on?  What's the  
> easiest way of doing this?
> >       • I've noticed that backup takes a very long time, and resul 
> ts in a file that is much larger than the actual cluster data direct 
> ories of the cluster.  Is this normal?
> >       • Not related to backups, but how do I configure the global  
> replication count of the cluster?
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