Are there any specific operational considerations one should make when using counter columns families?
Performance, as they incur a read and a write. 
There were some issues with overcounts in log replay (see the changes.txt). 
 
 How are counter column families stored on disk? 
Same as regular CF's. 

How do they effect compaction?
None.

Cheers

-----------------
Aaron Morton
Freelance Cassandra Developer
New Zealand

@aaronmorton

On 6/02/2013, at 7:47 AM, Drew Kutcharian <drew@venarc.com> wrote:

Hey Guys,

Are there any specific operational considerations one should make when using counter columns families? How are counter column families stored on disk? How do they effect compaction?

-- Drew