Tools helping find duplicated directories in the backups.
The motivation was a bloated backup with 0.5TB of familiy photos.
listfiles
listfiles lists all the files recursively, prints size and the hash. The hash is used to determine if files are duplicates. The different hash options are:
- Full file - read the whole file and calculate the hash. Slow, requires reading all of the content.
- Sampled - use file name, file size and 1KB of bytes from the middle of the file to calculate the hash. This is "good enough" e.g. for family photos.
- Name and size - use only file name and size. The fastest to use, but obviously error prone. Might be a good way to have a first look at the data.
analyze
Basic usage:
analyze -t -dd output_of_listfiles`
Print tree of directories that are duplicates