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From Philippe <watche...@gmail.com>
Subject Re: Bulk loading into live data
Date Wed, 17 Aug 2011 12:36:21 GMT
>
> What if the column is a counter ? Does it overwrite or increment ? Ie if
> the SST I am loading has the exact same setup but value 2, will my value
> change to 3 ?
>
> Counter columns only know how to increment (assuming no deletes), so you
> will get 3. See
> https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/io/sstable/AbstractSSTableSimpleWriter.java#L153
>  and
> https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/db/CounterColumn.java#L138
>
Great, so I assume that I can "add" the same counter column multiple times
for the same key/SC in different nextRow() calls and the counter will still
get incremented ?
My use-case is that my bulk loading has data that's aggregated at a finer
granularity than the data in cassandra.

Thanks

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