cassandra sstable version in filename

Look in the filename of the sstable, you'll see some letters between hyphens/dashes, ie "-"; these are the version of your sstable, see below for possible values.

See: https://github.com/QwertyManiac/cassandra-cdh4/blob/master/src/java/org/apache/cassandra/io/sstable/Descriptor.java

Btw, cassandra "support" loves to send you to look at code, so download the code and get familiar with the basic structure (somehow).

        public static final Version LEGACY = new Version("a"); // "pre-history"
        // b (0.7.0): added version to sstable filenames
        // c (0.7.0): bloom filter component computes hashes over raw key bytes instead of strings
        // d (0.7.0): row size in data component becomes a long instead of int
        // e (0.7.0): stores undecorated keys in data and index components
        // f (0.7.0): switched bloom filter implementations in data component
        // g (0.8): tracks flushed-at context in metadata component
        // h (1.0): tracks max client timestamp in metadata component
        // hb (1.0.3): records compression ration in metadata component
        // hc (1.0.4): records partitioner in metadata component
        // hd (1.0.10): includes row tombstones in maxtimestamp
        // he (1.1.3): includes ancestors generation in metadata component
        // hf (1.1.6): marker that replay position corresponds to 1.1.5+ millis-based id (see CASSANDRA-4782)
        // ia (1.2.0): column indexes are promoted to the index file
        // records estimated histogram of deletion times in tombstones
        // bloom filter (keys and columns) upgraded to Murmur3
        // ib (1.2.1): tracks min client timestamp in metadata component