Re: 100 million columns vs 100 million rows/keys

2010-11-26 Thread Nick Telford
Prior to Cassandra 0.7, there was a limitation of 2GB on row sizes as the entire row had to fit in memory for compaction. As far as I'm aware, in Cassandra 0.7, the limit has changed to 2^31 (approximately 2 billion) columns. See http://wiki.apache.org/cassandra/CassandraLimitations for more detai

100 million columns vs 100 million rows/keys

2010-11-26 Thread Marcin
Hi guys, I would like to be able to do slices but have been reading that when using too many columns under one key Cassandra becomes very slow? Is it true and if so what are the suggestions. P.S. The value of the column is just 1 so its quite flat model, reasons behind are slicing on name.