a timeline management tool for filesystems.


Protecting ones data has always been a tough challenge. Fortunetly there has been a lot of new technology developed that give new ways to solve old problems. Here are tools that enable people to manage and protect their data, in a better way.

This tool will help you manage your filesystems, including snapshots with a simpler more flexible policy format. We're also building backups based on indexing and checksum'ing files from the snapshot. There are several design advantages that one gets when backing up the snapshot vs the live filesystem, but the backup functionality can be used without snapshots as well.


This tool is designed to be ported to any storage technology. Currently works with:

  • linux
  • btrfs
  • zfs
  • ext4
  • gpt partition tables
  • dm-crypt (luks/cryptsetup) for crypto


  • General - This software is still experimental. Not everthing works, but the scripts and execution follow a simple design, that anyone who feels comfortable running commands as root that can reformat filesystem should be able to review any command simply.

  • Lowlevel - There are scripts to assist setting up partitions setting up crypto block devices, adding filesystems to partitions. All disk level commands are contained in shell scripts that average less then 40 lines per file. There is a tool to help run through all the steps to create a new filesystem on a new disk.

See USAGE for more details.

  • Snapshots - There is a tool to manage snapshots with a simple policy. Gone are the hourly/daily concepts, and replaced with a unified policy regarding snapshot density.
# crontab -l
10,40 * * * * snapmgr create /my/vol --noprompt
0     4 * * * snapmgr manage /my/vol --policy="0-1dy: all, 1dy-1wk: 8hr, \
                                               4wk-1yr: 2wk, 1yr+: none" --noprompt

See USAGE for more details.

  • Backups - This tool is currently in progress. Currently there is a sqlite database that stores indexes and checksums of files. There will be more support code to place each file on a set of fileystems registerd as "archive" where each file will be encrypted with it's own key.

See lib/saveme/ for details.