question Re: Apache Cassandra :Is a a key-value or a column-oriented (or tabular) database management system? in Support Questions

Apache Cassandra :Is a a key-value or a column-oriented (or tabular) database management system?

amit_dass — Fri, 21 Oct 2016 02:14:41 GMT

Can anyone clarify this :

Apache Cassandra is a key-value or a column-oriented (or tabular) database management system?

Re: Apache Cassandra :Is a a key-value or a column-oriented (or tabular) database management system?

sunile_manjee — Fri, 21 Oct 2016 04:00:56 GMT

@Amit Dass Yes it is a key value store similar to Apache HBase. Think of it as a map. To get a "column" you need to know how to find it. That is through the rowkey design. the rowkey+column name provide you the "Map" to the column of where it physically resides.

Re: Apache Cassandra :Is a a key-value or a column-oriented (or tabular) database management system?

cstanca — Fri, 21 Oct 2016 05:40:04 GMT

@Amit Dass

Both, Cassandra and HBase are columnar.

Key-Value stores store keys value pairs, generally in buckets, exactly like a hash table data structure. Example is Redis, Memcache, etc.

Column stores seem to store data in related rows, but they actually serialize the data into columns.

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