It's not possible and it's not possible to make the change.
A write to the same key in multiple CF's is written as a single log record. So
it's not possible for difference CF's to use different strategies.
The closest thing is the durable_writes KS property which turns off the commit
log for
I require durability for inserts to my column families so I'm using
batch mode to insert data.
However, I have some column families which I use for less important
data (indexes) which are much more write intensive.
If I could change the commit log setting only for them to periodic
instead of batch,
