Hi David, Alexander is correct, bucket properties are gossiped across the cluster. If the backend property has been set for a bucket, any new nodes added to the cluster will learn about that backend setting.
A few notes about multi backend: 1. I found a couple of issues with the current multi backend functionality: Nodes don't store data if a backend is not defined on the node: https://issues.basho.com/show_bug.cgi?id=670 Nodes can't find data if the backend property of a bucket is changed after adding data: https://issues.basho.com/show_bug.cgi?id=671 Until these issues are fixed I would suggest: 1. Define a consistent "multi_backend" configuration in all nodes 2. Do not change the "backend" property of a bucket once set I also filed a feature request proposing an alternate method for managing multiple backends, you can remove this request here: https://issues.basho.com/show_bug.cgi?id=672 Thanks, Dan Daniel Reverri Developer Advocate Basho Technologies, Inc. d...@basho.com On Tue, Aug 24, 2010 at 4:01 PM, Alexander Sicular <sicul...@gmail.com>wrote: > Hi David, > > AFAIK, bucket properties are shared via gossip chatter. That is why it is > recommended that you modify the bucket defaults via the config file if you > are going to have a lot of buckets with different params from the default. > Bucket properties and the backends that buckets use are different. > Properties play at the ring/gossip level and backends play at the node > level. So, for instance you can have the same logical 'bucket' have two > different backends on two different physical nodes, afaik. > > -Alexander > > On Aug 24, 2010, at 6:46 PM, David Weldon wrote: > > > Do bucket properties get propagated to new riak nodes? For example, if > > I have 3 nodes, and on each I called riak_client:set_bucket/2, then I > > add a 4th node - does the new node know all of the existing bucket > > properties (n_val, allow_mult, etc.)? In particular, I'd like to know > > if the 'backend' property gets propagated to new nodes. If it does > > not, I should probably run my bucket setup every time I start my > > application. > > > > _______________________________________________ > > riak-users mailing list > > riak-users@lists.basho.com > > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com >
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