Gzip files are allowed to consist of multiple streams. Bgzip (block gzip) is one tool that reads and writes gzip-compatible files in parallel. The output can be

Gzip files are allowed to consist of multiple streams. Bgzip (block gzip) is one tool that reads and writes gzip-compatible files in parallel. The output can be decompressed in parallel by bgzip, or semi-random access, or decompressed normally by gzip.