Seastar now supports two RPC compression algorithm: the original LZ4 one and LZ4_FRAGMENTED. The latter uses lz4 stream interface which allows it to process large messages without fully linearising them. Since, RPC requests used by Scylla often contain user-provided data that potentially could be very large, LZ4_FRAGMENTED is a better choice for the default compression algorithm. Message-Id: <20190417144318.27701-1-pdziepak@scylladb.com>