get_range_slices with no columns could be made faster by scanning the index file
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Key: CASSANDRA-2904
URL: https://issues.apache.org/jira/browse/CASSANDRA-2904
Project: Cassandra
Issue Type: Improvement
Components: Core
Affects Versions: 0.7.6
Reporter: Jean-Francois Im
When scanning a column family using get_range_slices() and a predicate that
contains no columns, the scan operates on the actual data, not the index file.
Our use case for this is that we have a column family that has relatively wide
rows(varying from 10kb to over 100kb of data per row) and we need to do iterate
through all the keys to figure out which rows we are interested in; obviously,
going through the index file than the data is faster in this case(in the order
of minutes versus hours).
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