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From Tomas Vondra ...@fuzzy.cz>
Subject Re: multiple nodes sharing the same IP
Date Sat, 23 Apr 2011 14:42:42 GMT
Dne 23.4.2011 10:15, Maki Watanabe napsal(a):
> storage_port: Used for Gossip and Data exchange. So in your word, it
> is the port for the seeds.
> 
> You CAN change the storage_port, but all nodes in your ring need to
> use same storage_port number.
> That's why you need different IP address for each node.

Oh, I see. So if the nodes can't use different storage ports, then it's
obvious why it's not needed to specify a port for seeds (there's only
one possible value, shared by all the nodes). I don't see a reason for
this restriction, but it explains the need for multiple IPs.

> rpc_port: Used for Thrift which the Cassandra clients connect to.
> 
> I can't understand why you can't change rpc_port.

That statement (I've mixed rpc and storage port in my previous post) was
based on the logic that if you can't specify a port for a seed, you
can't actually change it. I didn't know all the nodes need to share the
same storage port, which means you don't need to specify the port
because it's equal to the port for the new node.

regards
Tomas

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