Re: Misc Performance Questions

2011-06-08 Thread Richard Low
On Wed, Jun 8, 2011 at 12:30 PM, AJ wrote: >> There is however a difference in running multiple column families >> versus putting everything in the same column family and separating >> them with e.g. a key prefix.  E.g. if you have a large data set and a >> small one, it will be quicker to query

Re: Misc Performance Questions

2011-06-08 Thread AJ
Thank you Richard! On 6/8/2011 2:57 AM, Richard Low wrote: There is however a difference in running multiple column families versus putting everything in the same column family and separating them with e.g. a key prefix. E.g. if you have a large data set and a small one, it will be quicker to

Re: Misc Performance Questions

2011-06-08 Thread Richard Low
Hi AJ, On Wed, Jun 8, 2011 at 9:29 AM, AJ wrote: > Is there a performance hit when dropping a CF?  What if it contains .5 TB of > data?  If not, is there a quick and painless way to drop a large amount of > data w/minimal perf hit? Dropping a CF is quick - it snapshots the files (which creates

Misc Performance Questions

2011-06-08 Thread AJ
Is there a performance hit when dropping a CF? What if it contains .5 TB of data? If not, is there a quick and painless way to drop a large amount of data w/minimal perf hit? Is there a performance hit running multiple keyspaces on a cluster versus only one keyspace given a constant total