enhancement: tarsnap chunker / importer (Content defined, polynomial, fast converging chunking)
#3.603 geöffnet am 17. Jan. 2017
Repository-Metriken
- Stars
- (13.906 Stars)
- PR-Merge-Metriken
- (Durchschn. Merge 4T 2h) (28 gemergte PRs in 30 T)
Beschreibung
Version information:
go-ipfs version: 0.4.4
Type: Feature, Enhancement
Priority: P4
Area: Tools, Importer
Description:
Better suited for maximizing deduplication ratio then current Rabin chunker.
Using smaller chunks with faster convergence yields greater space savings, and the benefit depending on dataset can be great in comparison to Rabin.
The mean chunk size used by tarsnap is 64k.
Source: https://github.com/Tarsnap/tarsnap/blob/master/tar/multitape/chunkify.h https://github.com/Tarsnap/tarsnap/blob/master/tar/multitape/chunkify.c
Related: https://moinakg.wordpress.com/2012/11/11/inside-content-defined-chunking-in-pcompress/ https://moinakg.wordpress.com/2012/11/15/inside-content-defined-chunking-in-pcompress-part-2/