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From: Roshni Rajagopal <Roshni.Rajagopal@wal-mart.com>
To: "user@cassandra.apache.org" <user@cassandra.apache.org>
Date: Tue, 5 Jun 2012 23:12:22 -0700
Subject: Re: How to include two nodes in Java code using Hector
Thread-Topic: How to include two nodes in Java code using Hector
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In Hector when you create a cluster using the API, you specify an IP addres=
s & cluster name. Thereafter internally which node serves the request or ho=
w many nodes need to be contacted to read/write data depends on the cluster=
 configuration i.e. Whats your replication strategy, factor, consistency le=
vels 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 clust=
er, when you make Hector calls to read/write data, it would automatically f=
igure 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.Agrawal@mu-sigma.com<mailto:Prakrati.Agraw=
al@mu-sigma.com>>
Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <us=
er@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@cas=
sandra.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 no=
de and 50% of data is on another node) so I need to specify the node ip add=
ress somewhere in the code. But where do I specify that is what I am cluele=
ss about. Please help me

Prakrati Agrawal | Developer - Big Data(I&D)| 9731648376 | www.mu-sigma.com

From: Harshvardhan Ojha [mailto:Harshvardhan.Ojha@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 =3D2.

Regards
Harsh

From: Prakrati Agrawal [mailto:Prakrati.Agrawal@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. Please help

Thanks and Regards

Prakrati Agrawal | Developer - Big Data(I&D)| 9731648376 | www.mu-sigma.com=
<http://www.mu-sigma.com>


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