1ms per add operation is the general order of magnitude I have seen with my tests.

On Wed, Aug 31, 2011 at 6:04 PM, Ian Danforth <idanforth@numenta.com> wrote:

 I've got a 4 node cluster (ec2 m1.large instances, replication = 3)
that has one primary counter type column family, that has one column
in the family. There are millions of rows. Each operation consists of
doing a batch_insert through pycassa, which increments ~17k keys. A
majority of these keys are new in each batch.

 Each operation is taking up to 15 seconds. For our system this is a
significant bottleneck.

 Does anyone know if this write speed is expected?

Thanks in advance,