Dan,
Is it true that "ring_creation_size" should only be altered at the
creation of a cluster? Once you already have physical nodes in a
cluster you shouldn't adjust the "ring_creation_size". True?
Thanks, Alexander.
@siculars on twitter
http://siculars.posterous.com
Sent from my iPhone
On Sep 30, 2010, at 19:16, Dan Reverri <d...@basho.com> wrote:
Hi Michael,
There is no hard coded limit to the number of nodes that can belong
to a cluster. Depending on how quickly you are adding nodes to the
cluster you may be running into an issue with the ring not
converging on a single state.
Can you try using the "riak-admin ringready" command between each
join of a node? This command will return TRUE if the nodes all agree
on a particular ring state. You should run this command until it
returns TRUE after each join.
Also, Alexander is correct; you should deploy your nodes with an
increased value for the "ring_creation_size" parameter in
app.config. The typical recommendation is to have a minimum of 10
partitions per node and the value should be a power of 2 (64, 128,
256, 512, 1024). For a 63 node cluster a value of 1024 would work
well.
Thanks,
Dan
Daniel Reverri
Developer Advocate
Basho Technologies, Inc.
d...@basho.com
On Thu, Sep 30, 2010 at 12:02 PM, Alexander Sicular <sicul...@gmail.com
> wrote:
The default vnode number is 64. If you are connecting 63 physical
nodes togeter in one riak cluster than you really want to increase
the number of vnodes. There is some recommended metric for physical
nodes to vnodes. I think it's like a minimum of 4 vnodes per
physical node. But I could be totally making that up.
-Alexander.
@siculars on twitter
http://siculars.posterous.com
Sent from my iPhone
On Sep 30, 2010, at 14:26, Michael Colussi <mcolu...@gmail.com> wrote:
Hey guys,
My team was trying to launch a 63 node Riak cluster yesterday,
using version 0.13rc3 and the bitcask backend.
All 63 nodes agreed that the ring consisted of nodes 1-42 only.
Any ideas? Is there a hardcoded limit to the number of nodes
allowed?
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