> I do limit the number of rows I'm asking for in Pycassa. Queries on primary > keys still work fine,
Is it feasable in your situation to keep track of the oldest possible data (for example, if there is a single sequential writer that rotates old entries away it could keep a record of what the oldest might be) so that you can bound your index lookup >= that value (and avoid the tombstones)? -- / Peter Schuller (@scode, http://worldmodscode.wordpress.com)
