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From Andrey Kornev <andrewkor...@hotmail.com>
Subject RE: Cluster group affinity
Date Tue, 06 Oct 2015 14:07:33 GMT
Andrey, thanks!

But a "properly formed AffinityFunctionContext" is the problem:
1) I'm expected to return an instance of the internal class AffinityTopologyVersion.
2) the consequences of returning null from AffinityFunctionContext.previousAssignment and
AffinityFunctionContext.discoveryEvent methods (because I can't provide any meaningful implementation
for them) are not clear.

Please advise.

Thanks
Andrey

> Date: Tue, 6 Oct 2015 16:43:10 +0300
> Subject: Re: Cluster group affinity
> From: agura@gridgain.com
> To: dev@ignite.apache.org
> 
> Andrey,
> 
> See AffinityFunction.assignPartitions method. It returns assignment list as
> List<List<ClusterNode>> where index of element in returned list corresponds
> to partition number. Assignment for each partition represented as list of
> nodes where primary node is always the first. So you can use existing
> affinity functions for you case just passing properly formed
> AffinityFunctionContext to assignPartitions method.
> 
> On Tue, Oct 6, 2015 at 4:25 PM, Andrey Kornev <andrewkornev@hotmail.com>
> wrote:
> 
> > Dmitriy,
> >
> > The affinity function only maps a key to a partition id and it doesn't
> > seem to provide a way to map the partition id to a cluster node. So I'm a
> > little bit confused right now.
> >
> > Could you please clarify?
> >
> > Thanks a lot
> > Andrey
> >
> > > From: dsetrakyan@apache.org
> > > Date: Mon, 5 Oct 2015 09:53:25 -0700
> > > Subject: Re: Cluster group affinity
> > > To: dev@ignite.apache.org
> > >
> > > On Mon, Oct 5, 2015 at 2:28 AM, Andrey Kornev <andrewkornev@hotmail.com>
> > > wrote:
> > >
> > > > Hello,
> > > >
> > > > I have a user-defined cluster group and I'd like to be able to
> > > > consistently pick the same node in the group for a given key.
> > Essentially,
> > > > what I want is a cluster group affinity that is not associated with any
> > > > cache. How can I do it?
> > > >
> > >
> > > Andrey, perhaps you could just take our affinity function and use it
> > > directly, no?
> > >
> > >
> > > >
> > > > Thanks
> > > > Andrey
> > > >
> >
> >
> 
> 
> 
> -- 
> Andrey Gura
> GridGain Systems, Inc.
> www.gridgain.com
 		 	   		  
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