Compression of data for a file system utilizing protection groups can be implemented and managed. A compression management component (CMC) can control compression of data via inline or post-process compression for storage in protection groups in memory, including determining whether to compress data, determining a compression algorithm to utilize to compress data, and/or determining whether to perform inline and/or post-process compression of data. CMC can generate protection group (PG) metadata for a PG in which compressed data is stored. PG metadata can comprise a logical extent map that describes which logical blocks contain compressed data, a list of cyclic redundancy check values for logical blocks, and a list of compression chunks that store individual metadata regarding individual compressed streams, wherein, for an individual compressed stream, the individual metadata comprises a compression format, compressed size, uncompressed size, and/or starting offset in physical space within the PG.
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