`sstable_compression_user_table_options` allows configuring a
node-global SSTable compression algorithm for user tables via
scylla.yaml. The current default is `LZ4Compressor` (inherited from
Cassandra).
Make `LZ4WithDictsCompressor` the new default. Metrics from real datasets
in the field have shown significant improvements in compression ratios.
If the dictionary compression feature is not enabled in the cluster
(e.g., during an upgrade), fall back to the `LZ4Compressor`. Once the
feature is enabled, flip the default back to the dictionary compressor
using with a listener callback.
Signed-off-by: Nikos Dragazis <nikolaos.dragazis@scylladb.com>
(cherry picked from commit 2fc812a1b9)
3b801f3d80