f14e6e73bb
This adds the option to compress sstables using the Zstandard algorithm (https://facebook.github.io/zstd/). To use, pass 'sstable_compression': 'org.apache.cassandra.io.compress.ZstdCompressor' to the 'compression' argument when creating a table. You can also specify a 'compression_level'. See Zstd documentation for the available compression levels. Resolves #2613. Signed-off-by: Kamil Braun <kbraun@scylladb.com>
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