Lempel–Ziv Ross Williams, (LZRW) refers to variants of the LZ77 lossless data compression

Lossless data compression

Lossless data compression is a class of data compression algorithms that allows the exact original data to be reconstructed from the compressed data. The term lossless is in contrast to lossy data compression, which only allows an approximation of the original data to be reconstructed, in exchange...

 algorithms with an emphasis on improving compression speed through the use of hash tables and other techniques. This family was explored by Ross Williams

Ross Williams

Ross Neil Williams is an Australian computer scientist and entrepreneur who has made significant contributions to data compression and data deduplication technologies...

, who published a series of algorithms beginning with LZRW1 in 1991.

The variants are:

• LZRW1
• LZRW1-A
• LZRW2
• LZRW3
• LZRW3-A
• LZRW4
• LZRW5

The LZJB

LZJB

LZJB is a lossless data compression algorithm invented by Jeff Bonwick to compress crash dumps and data in ZFS. It includes a number of improvements to the LZRW1 algorithm, a member of the Lempel-Ziv family of compression algorithms.-External links:* * *...

 algorithm used in ZFS

ZFS

In computing, ZFS is a combined file system and logical volume manager designed by Sun Microsystems. The features of ZFS include data integrity verification against data corruption modes , support for high storage capacities, integration of the concepts of filesystem and volume management,...

is derived from LZRW1.