Compression methods

Windows NT compression methods

Identifier	Description
COMPRESSION_FORMAT_LZNT1	LZNT1 compression (LZ77). Sometimes also referred to as NTFS compression.
COMPRESSION_FORMAT_XPRESS	LZXPRESS compression (LZ77 + DIRECT2).
COMPRESSION_FORMAT_XPRESS_HUFF	LZXPRESS with Huffman compression.

External Links

• MSDN: RtlCompressBuffer function

• MSDN: RtlDecompressBuffer function

• MSDN: LZNT1