If you run a manual compaction with nodetool each CF will be compacted to a single SSTable.
Not that this is not normally recommended as it means that automatic compaction will take a long time to get to the file. Take a look at nodetool cfhistograms to get an idea of how spread out your data is. Cheers ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 17/02/2012, at 8:14 PM, zhangcheng wrote: > > Cassandra has no way of knowing that all the data is in the most recent > sstable, and will have to check the others too, and this bring a lot of > difficulty to data compaction. > > I have a question that if I want a high performance data compaction, how can > I implement that all the columns are all in the most recent sstable, by this, > I think the read and write performace will be better. > > Thanks. > > > 2012-02-17 > zhangcheng
