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From Ran Tavory <>
Subject Re: Is ReplicationFactor values number of replicas or number of copies of data?
Date Mon, 07 Jun 2010 11:26:15 GMT
to have two copies you need RF=2.
RF=0 doesn't make sense as far as I understand it.

On Mon, Jun 7, 2010 at 2:16 PM, Per Olesen <> wrote:

> Hi,
> I am unclear about what the ReplicationFactor value means.
> Does RF=1 mean that there is only one single node that has the data in the
> cluster (actually no replication), or, does it mean, that there are two
> copies of the data - one "actual" and one "replica" (as in "replicated one
> time")?
> I noticed, that I CAN start a node with RF=0, but I get
> UnavailableException when trying to insert, so I assume RF=0 is wrong then?
> Put another way: If I want my data to always live on exactly 2 nodes in the
> cluster, do I set RF=2 or RF=1? :-)
> /Per

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