On Tue, Mar 25, 2014 at 8:36 AM, shahab <shahab.mok...@gmail.com> wrote:
> But after iteration 8, (i.e. inserting 1500000 sensor data), the "select
> count(') ...) throws time-out exception and doesn't work anymore. I even
> tried to execute "select count(*)..." using Datastax DevCenter GUI, but I
> got same result.
>
All operations in Cassandra are subject to (various) timeouts, which by
default are in the scale of single digit seconds.
If you attempt to do an operation (such as aggregates across large numbers
of large objects) which cannot complete in this time, this is a strong
indication that either your overall approach is inappropriate or, at very
least, that your buckets are too large.
=Rob
