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.jevdoki...@adform.com Phone: +370 5 212 3063 Fax: +370 5 261 0453 J. Jasinskio 16C, LT-01112 Vilnius, Lithuania Disclaimer: The information contained in this message and attachments is intended solely for the attention and use of the named addressee and may be confidential. If you are not the intended recipient, you are reminded that the information remains the property of the sender. You must not use, disclose, distribute, copy, print or rely on this e-mail. If you have received this message in error, please contact the sender immediately and irrevocably delete this message and any copies.> -----Original Message----- > From: Niteesh kumar [mailto:nitees...@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...
