Cassandra in the outer structure is the cluster within the cluster there is one or more keyspaces, which is the container for the application data, similar to a relational database. Within the keyspace will one or more objects of the column family, which are analogous to tables. And a set of related motion sensor door chime columns is identified by a key. Each row of a family column is not required to have the same number of columns. Cassandra has no relations between the column families in the same way that relational databases have between tables: there are no foreign keys in Cassandra, this way is not possible to unite families of columns motion sensor door chime in query time.
2013 (9) May (4) April (2) March (1) January (2) 2012 (7) November (3) Customers motion sensor door chime CAdmin Tool for high-level Cassandra Data Model Apache Cassandra September (3) May (1)
No comments:
Post a Comment