There are cases in which a Summary file will not be present, and imported
SSTables will have just the Index and Data files. In earlier versions of
Cassandra, a Summary didn't exist, so one may not be generated when migrating.
In Issue #1170, we can see an example of tables generated by CQLSSTableWriter,
and they lack a Summary. Cassandra is robust against this and can cope
perfectly with the Summary not existing. I will argue that we should do the
same.
Signed-off-by: Glauber Costa <glauber@scylladb.com>
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