Cassandra SSTable Format Version Numbers

find /var/lib/cassandra/data/ -type f | grep -v -- -ib- | grep -v "/snapshots"

The version numbers, to date are:

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
ic (1.2.5): omits per-row bloom filter of column names

ja (2.0.0):
- super columns are serialized as composites (note that there is no real format change, this is mostly a marker to know if we should expect super columns or not. We do need a major version bump however, because we should not allow streaming of super columns into this new format)
- tracks max local deletiontime in sstable metadata
- records bloom_filter_fp_chance in metadata component
- remove data size and column count from data file (CASSANDRA-4180)
- tracks max/min column values (according to comparator)
jb (2.0.1): switch from crc32 to adler32 for compression checksums
- checksum the compressed data

shyamsalimkumar/sstable-format-version-numbers.md