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kimono-koans
httm
Rust2022–2024
kimono-koans / httm

httm

Interactive, file-level Time Machine-like tool for ZFS/btrfs/nilfs2 (and even Time Machine and Restic backups!)

Command LineSystems & InfrastructureSelf-hosted
Explore on GitHubRead Hacker News discussions
7Distinct people
29Mentions
1Explicit recommenders
1.7KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Interactive, file-level Time Machine-like tool for ZFS/btrfs/nilfs2 (and even Time Machine and Restic backups!)

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

From the help and man page[0]: --roll-forward="snap_name" traditionally 'zfs rollback' is a destructive operation, whereas httm roll-forward is non-destructive. httm will copy…

mustache_kimono used a recommendation phrase. One indexed comment matches. This is a phrase match, not a verdict.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 6:59:22 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by month29 dated mentions

Observed mentions: 2022-03-08 03:57:35 UTC to 2024-07-23 11:53:14 UTC.

012342022-03-01 00:00:00 UTC to 2022-04-01 00:00:00 UTC (exclusive): 3 mentions; 1 submissions, 2 commentsMar 20222022-04-01 00:00:00 UTC to 2022-05-01 00:00:00 UTC (exclusive): 3 mentions; 2 submissions, 1 comments2022-05-01 00:00:00 UTC to 2022-06-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2022-06-01 00:00:00 UTC to 2022-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2022-07-01 00:00:00 UTC to 2022-08-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2022-08-01 00:00:00 UTC to 2022-09-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2022-09-01 00:00:00 UTC to 2022-10-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2022-10-01 00:00:00 UTC to 2022-11-01 00:00:00 UTC (exclusive): 4 mentions; 0 submissions, 4 comments2022-11-01 00:00:00 UTC to 2022-12-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2022-12-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-01-01 00:00:00 UTC to 2023-02-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-02-01 00:00:00 UTC to 2023-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-03-01 00:00:00 UTC to 2023-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-04-01 00:00:00 UTC to 2023-05-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-05-01 00:00:00 UTC to 2023-06-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 commentsMay 20232023-06-01 00:00:00 UTC to 2023-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-07-01 00:00:00 UTC to 2023-08-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-08-01 00:00:00 UTC to 2023-09-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2023-09-01 00:00:00 UTC to 2023-10-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2023-10-01 00:00:00 UTC to 2023-11-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2023-11-01 00:00:00 UTC to 2023-12-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-12-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-01 00:00:00 UTC to 2024-02-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-02-01 00:00:00 UTC to 2024-03-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-03-01 00:00:00 UTC to 2024-04-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-04-01 00:00:00 UTC to 2024-05-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2024-05-01 00:00:00 UTC to 2024-06-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-06-01 00:00:00 UTC to 2024-07-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-07-01 00:00:00 UTC to 2024-08-01 00:00:00 UTC (exclusive): 3 mentions; 1 submissions, 2 commentsJul 2024

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
Mar 20222022-03-01 00:00:00 UTC2022-04-01 00:00:00 UTC312
Apr 20222022-04-01 00:00:00 UTC2022-05-01 00:00:00 UTC321
May 20222022-05-01 00:00:00 UTC2022-06-01 00:00:00 UTC101
Jun 20222022-06-01 00:00:00 UTC2022-07-01 00:00:00 UTC000
Jul 20222022-07-01 00:00:00 UTC2022-08-01 00:00:00 UTC101
Aug 20222022-08-01 00:00:00 UTC2022-09-01 00:00:00 UTC101
Sep 20222022-09-01 00:00:00 UTC2022-10-01 00:00:00 UTC101
Oct 20222022-10-01 00:00:00 UTC2022-11-01 00:00:00 UTC404
Nov 20222022-11-01 00:00:00 UTC2022-12-01 00:00:00 UTC202
Dec 20222022-12-01 00:00:00 UTC2023-01-01 00:00:00 UTC000
Jan 20232023-01-01 00:00:00 UTC2023-02-01 00:00:00 UTC000
Feb 20232023-02-01 00:00:00 UTC2023-03-01 00:00:00 UTC000
Mar 20232023-03-01 00:00:00 UTC2023-04-01 00:00:00 UTC000
Apr 20232023-04-01 00:00:00 UTC2023-05-01 00:00:00 UTC101
May 20232023-05-01 00:00:00 UTC2023-06-01 00:00:00 UTC202
Jun 20232023-06-01 00:00:00 UTC2023-07-01 00:00:00 UTC000
Jul 20232023-07-01 00:00:00 UTC2023-08-01 00:00:00 UTC101
Aug 20232023-08-01 00:00:00 UTC2023-09-01 00:00:00 UTC202
Sep 20232023-09-01 00:00:00 UTC2023-10-01 00:00:00 UTC202
Oct 20232023-10-01 00:00:00 UTC2023-11-01 00:00:00 UTC000
Nov 20232023-11-01 00:00:00 UTC2023-12-01 00:00:00 UTC101
Dec 20232023-12-01 00:00:00 UTC2024-01-01 00:00:00 UTC000
Jan 20242024-01-01 00:00:00 UTC2024-02-01 00:00:00 UTC000
Feb 20242024-02-01 00:00:00 UTC2024-03-01 00:00:00 UTC000
Mar 20242024-03-01 00:00:00 UTC2024-04-01 00:00:00 UTC000
Apr 20242024-04-01 00:00:00 UTC2024-05-01 00:00:00 UTC101
May 20242024-05-01 00:00:00 UTC2024-06-01 00:00:00 UTC000
Jun 20242024-06-01 00:00:00 UTC2024-07-01 00:00:00 UTC000
Jul 20242024-07-01 00:00:00 UTC2024-08-01 00:00:00 UTC312

What Hacker News says

1 sources
mustache_kimono·Jul 4, 2023
Excited, because in addition to ref copies/clones, httm will use this feature, if available (I've already done some work to implement), for its `--roll-forward` operation, and for faster file recoveries from snapshots [0]. As I understand it, there will be no need to copy any data from the same dataset, and this includes all snapshots. Blocks written to the live dataset can just be references to the underlying blocks, and no additional space will need be used. Imagine being able to continuously switch a file or a dataset back to a previous state extremely quickly without a heavy weight clone, or a rollback, etc. Right now, httm simply diff copies the blocks for file recovery and roll-forward. For further details, see the man page entry for `--roll-forward`, and the link to the httm GitHub below: --roll-forward="snap_name" tradi
Read the rest
tionally 'zfs rollback' is a destructive operation, whereas httm roll-forward is non-destructive. httm will copy only the blocks and file metadata that have changed since a specified snapshot, from that snapshot, to its live dataset. httm will also take two precautionary snapshots, one before and one after the copy. Should the roll forward fail for any reason, httm will roll back to the pre-execution state. Note: This is a ZFS only option which requires super user privileges. [0]: https://github.com/kimono-koans/httm
In ZFS 2.2.0 (RC): Block Cloning merged

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