super-columns

Are there any Ruby clients for Cassandra with support of counters and supercolumns? 1) gem cassandra doesn't support counters 2) gem cassandra-cql doesn't support supercolumns (cql doesn't support them) The 'cassandra' gem does support counters, its just not well documented. Support was added in May 2011 ( a1a085469 ). To increment a counter: @twitter.add(:UserCounters, 'bob', 5, 'tweet_count') Where :UserCounters is the column family 'bob' is the row key 5 is the amount to increment the counter by 'tweet_count' is the column_name 来源： https://stackoverflow.com/questions/9307825/are-there-any

I want the following structure in my database with the cassandra -cli for example I have a person with an address and the address contains a zipcode, housenumber etc schematic it looks like this: name: "address", value: { city: {name: "city", value: "San Francisco"}, street: {name: "street", value: "555 Union Street"}, zip: {name: "zipcode", value: "94105"}, } I know how to create a supercolumn and normal columns. But I want to use the column_metadata to specify how the colums in a supercolumn look like. So that would end up something like this: Create column family person with comparator =

I have read in the latest release that super columns are not desirable due to "performance issues", but no where is this explained. Then I read articles such as this one that give wonderful indexing patterns using super columns. This leave me with no idea of what is currently the best way to do indexing in Cassandra. What are the performance issues of super columns? Where can I find current best practices for indexing? jericevans Super columns suffer from a number of problems, not least of which is that it is necessary for Cassandra to deserialze all of the sub-columns of a super column when