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From rohit bhatia <>
Subject Re: Persistent connection among nodes to communicate and redirect request
Date Tue, 02 Oct 2012 11:35:09 GMT
i guess 7000 is only for gossip protocol. Cassandra still uses 9160
for RPC even among nodes....
Also, I see Connections over port 9160 among various cassandra Nodes
in my cluster.
Please correct me if i am wrong..

PS: mentioned Here

On Tue, Oct 2, 2012 at 4:56 PM, Viktor Jevdokimov
<> wrote:
> 9160 is a client port. Nodes are using messaging service on storage_port (7000) for intra-node
> Best regards / Pagarbiai
> Viktor Jevdokimov
> Senior Developer
> Email:
> Phone: +370 5 212 3063
> Fax: +370 5 261 0453
> J. Jasinskio 16C,
> LT-01112 Vilnius,
> Lithuania
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and any copies.> -----Original Message-----
>> From: Niteesh kumar []
>> Sent: Tuesday, October 02, 2012 12:32
>> To:
>> Subject: Persistent connection among nodes to communicate and redirect
>> request
>> while looking at netstat table i observed that my cluster nodes not using
>> persistent connection  to talk among themselves on port 9160 to redirect
>> request. I also observed that local write latency is around
>> 30-40 microsecond, while its takes around .5 miliseconds if the chosen node
>> is not the node responsible for the key for 50K QPS. I think this attributes to
>> connection making time among servers as my servers are on same rack.
>> how can i configure my servers to use persistent connection on port 9160
>> thus exclude connection making time for each request that is redirected...

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