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From Viktor Jevdokimov <Viktor.Jevdoki...@adform.com>
Subject RE: Persistent connection among nodes to communicate and redirect request
Date Tue, 02 Oct 2012 11:26:00 GMT
9160 is a client port. Nodes are using messaging service on storage_port (7000) for intra-node
communication.


Best regards / Pagarbiai

Viktor Jevdokimov
Senior Developer

Email: Viktor.Jevdokimov@adform.com
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 [mailto:niteesh.k@directi.com]
> Sent: Tuesday, October 02, 2012 12:32
> To: user@cassandra.apache.org
> 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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