The lz4_decompress utility decompresses mysqlpump output that was created using LZ4 compression. lz4_decompress was added in MySQL 5.7.10.

Invoke lz4_decompress like this:

lz4_decompress input_file output_file

Example:

mysqlpump --compress-output=LZ4 > dump.lz4
lz4_decompress dump.lz4 dump.txt

To see a help message, invoke lz4_decompress with no arguments.

To decompress mysqlpump ZLIB-compressed output, use zlib_decompress. See Section 4.8.5, “zlib_decompress — Decompress mysqlpump ZLIB-Compressed Output”.