Yeah this is confusing.
What they are trying to say is that adding partitions doesn't move data
that is already in existing partitions. I.e. say you have 10 partitions
(0-9) each containing 1GB of data and you add an 11th partition. When this
is complete partitions 0-9 will contain the exact same data as before but
there will be an empty partition 10.
This is relevant to people who are partitioning their data by some key or
other semantic feature. If you are partitioning by primary_key %
partition_count and the partition_count changes then your data is now in
the wrong partition. That is what the warning is trying to call out.
On Thu, Jan 30, 2014 at 12:26 PM, Marc Labbe <[EMAIL PROTECTED]> wrote: