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The "CassandraLimitations" page has been changed by SilvereLestang. The comment on this change is: Adds "maximum of column per row". http://wiki.apache.org/cassandra/CassandraLimitations?action=diff&rev1=26&rev2=27 -------------------------------------------------- == Stuff that isn't likely to change == * All data for a single row must fit (on disk) on a single machine in the cluster. Because row keys alone are used to determine the nodes responsible for replicating their data, the amount of data associated with a single key has this upper bound. * A single column value may not be larger than 2GB. + * The maximum of column per row is 2 billion. == Artifacts of the current code base == * Cassandra has two levels of indexes: key and column. But in super columnfamilies there is a third level of subcolumns; these are not indexed, and any request for a subcolumn deserializes _all_ the subcolumns in that supercolumn. So you want to avoid a data model that requires large numbers of subcolumns. https://issues.apache.org/jira/browse/CASSANDRA-598 is open to remove this limitation.
