The client does not have to know where the data is, thats what the cluster works out see http://www.datastax.com/docs/1.0/cluster_architecture/about_client_requests
> Now I have decommissioned a node but now I don't know how to recommission it > .Please help me http://www.datastax.com/docs/1.0/operations/cluster_management Cheers ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 6/06/2012, at 6:12 PM, Prakrati Agrawal wrote: > Thank you for the reply. > Now I have decommissioned a node but now I don't know how to recommission it > .Please help me > > Thanks and Regards > > Prakrati Agrawal | Developer - Big Data(I&D)| 9731648376 | www.mu-sigma.com > > -----Original Message----- > From: Roshni Rajagopal [mailto:roshni.rajago...@wal-mart.com] > Sent: Wednesday, June 06, 2012 11:42 AM > To: user@cassandra.apache.org > Subject: Re: How to include two nodes in Java code using Hector > > > > In Hector when you create a cluster using the API, you specify an IP address > & cluster name. Thereafter internally which node serves the request or how > many nodes need to be contacted to read/write data depends on the cluster > configuration i.e. Whats your replication strategy, factor, consistency > levels for the col family , how many nodes are there in the ring etc. So you > don't individually need to connect to each node via Hector client. Once you > connect to the cluster & keyspace, via any IP add of any node in the cluster, > when you make Hector calls to read/write data, it would automatically figure > out the node level details and carry out the task. You won't get 50% of the > data, you will get all data. > > > Also when you remove a node, your data will be unavailable ONLY if you don't > have it available in some other node as a replica.. > > > Regards, > > > From: Prakrati Agrawal > <prakrati.agra...@mu-sigma.com<mailto:prakrati.agra...@mu-sigma.com>> > Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" > <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> > Date: Tue, 5 Jun 2012 20:05:21 -0700 > To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" > <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> > Subject: RE: How to include two nodes in Java code using Hector > > But the data is distributed on the nodes ( meaning 50% of data is on one node > and 50% of data is on another node) so I need to specify the node ip address > somewhere in the code. But where do I specify that is what I am clueless > about. Please help me > > Prakrati Agrawal | Developer - Big Data(I&D)| 9731648376 | www.mu-sigma.com > > From: Harshvardhan Ojha [mailto:harshvardhan.o...@makemytrip.com] > Sent: Tuesday, June 05, 2012 5:51 PM > To: user@cassandra.apache.org<mailto:user@cassandra.apache.org> > Subject: RE: How to include two nodes in Java code using Hector > > Use Consistency Level =2. > > Regards > Harsh > > From: Prakrati Agrawal [mailto:prakrati.agra...@mu-sigma.com] > Sent: Tuesday, June 05, 2012 4:08 PM > To: user@cassandra.apache.org<mailto:user@cassandra.apache.org> > Subject: How to include two nodes in Java code using Hector > > Dear all > > I am using a two node Cassandra cluster. How do I code in Java using Hector > to get data from both the nodes. 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