Questions tagged [cassandra]

Apache Cassandra is an open source distributed database management system. It is designed to handle very large amounts of data spread out across many commodity servers while providing a highly available service with no single point of failure. It is a NoSQL solution.

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Database software advice [closed]

I have this strange question. I'm building a service that stores information into one table. That table has 20 columns. My database will have many billion rows. Right now I'm using Cassandra, but it ...
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How does Apache Cassandra handle dynamic column set conflicts?

I know that each column in Apache Cassandra has a timestamp attached and that read conflicts for a single column is resolved deterministically by looking at timestamp or by comparing the value. Let's ...
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Is there any open source GUI tool to monitor cassandra? [closed]

I would like to monitor cassandra database as well as need to check the values in the database. Could any one suggest me best open source GUI tool ? Regards, Arun Raj.
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Cassandra multidatacenter configuration with 1 external ip

I'm trying to setup a multi-datacenter Cassandra cluster. The problem is that my datacenters have only 1 external IP (wan IP), I can setup port forwarding on the data centers switchs to access each ...
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2answers
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Cassandra in multiple data center - EC2MultiRegionSnitch

I was reading article from : http://www.datastax.com/docs/1.0/cluster_architecture/replication#networktopologystrategy and I have a question about - EC2MultiRegionSnitch. I did not understand it well. ...
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1answer
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Which database to use? [closed]

Hey there. I am looking for a free to use for commercial website database that should have these design features, in the given order: Auto-Sharding (getting more free space by adding more server ...
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1answer
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What are the practical limitations on a column family in Cassandra?

In Cassandra, it's not recommended to have more than a few thousand column families, let's say 2,000 for the sake of argument. In cases where more than 2,000 types of data need to be persisted, one ...
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2answers
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Cassandra encryption at rest

I need to store some sensitive data in Cassandra and require it to be encrypted at rest. Is it likely Cassandra would function normally on top of a Linux encrypted file system (something like the open ...
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Strugling with updating a cassandra row in FluentCassandra

I have this problem with using Fluent Cassandra in a test application. All I want to do is set the IsOnline field to true inside the SignIn method, but I keep getting the exception supercolumn ...
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1answer
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Cassandra upgrade/repair issues in migration

I wanted to migrate part of the column families in a cluster to a new cluster. I made a snapshot of the source cluster and copied the data, made a new cluster with the same name, same number of nodes ...
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How can I generate Cassandra data model from a MySQL schema?

Is there a tool for generating a Cassandra model from a MySQL database?
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Cassandra cqlsh browser queries possible only in bytes

I am using Cassandra database through cqlsh client on Linux. I can make only queries with values given as bytes, but I would like to search with the client like in SQL where everything is Strings. ...
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Commercial database systems versus open source database systems [closed]

Can anyone tell me what are the reasons for buying a commercial database system and not using an open-source free version? The reason for my question is that: Commercial systems cost upwards of 10....
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What is different bettween Cassandra NoSQL data model and SQL data model

can any one tell. cassandra data model and sql data model how we can define row and column with cassandra data model?
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What are the penalties of using many (thousands) of column families or keyspaces in Cassandra?

I am in the process of evaluating the best design for our Cassandra installation. There is not so much information out there on the Internet about using the first two levels of access that Cassandra ...