Prevent tombstones creation

Question

I need to perform an insert to Cassandra table without creating tombstones for any column. I am using a query similar to this :

insert into my_table(col1,col2,col3

Answer 1

Don't include col3 in your insert and it just wont set anything.

insert into my_table(col1,col2) values(val1,val2)

If curious about structure on disk, do a nodetool flush and run sstabledump on the sstable created to see difference.