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docs: working around btrfs send issues isn't really a feature

Browse Source 
The critical kernel bugs in send have been fixed for years.
The limitations that remain aren't bugs, and bees has no sustainable
workaround for them.

Also update copyright year range.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell 2023-03-07 10:20:16 -05:00
parent b7665d49d9
commit da3ef216b1
2 changed files with 10 additions and 13 deletions
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3
README.md
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@ -17,7 +17,6 @@ Strengths
* Space-efficient hash table and matching algorithms - can use as little as 1 GB hash table per 10 TB unique data (0.1GB/TB)
* Daemon incrementally dedupes new data using btrfs tree search
* Works with btrfs compression - dedupe any combination of compressed and uncompressed files
* **NEW** [Works around `btrfs send` problems with dedupe and incremental parent snapshots](docs/options.md)
* Works around btrfs filesystem structure to free more disk space
* Persistent hash table for rapid restart after shutdown
* Whole-filesystem dedupe - including snapshots
@ -70,6 +69,6 @@ You can also use Github:
Copyright & License
-------------------
Copyright 2015-2022 Zygo Blaxell <bees@furryterror.org>.
Copyright 2015-2023 Zygo Blaxell <bees@furryterror.org>.
GPL (version 3 or later).

20
docs/index.md
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@ -6,11 +6,10 @@ Best-Effort Extent-Same, a btrfs deduplication agent.
About bees
----------
bees is a block-oriented userspace deduplication agent designed to scale
up to large btrfs filesystems. It is a daemon that performs offline
dedupe automatically as required. It uses an incremental data scan
capability to minimize memory usage and dedupe new data soon after it
appears in the filesystem.
bees is a block-oriented userspace deduplication agent designed for large
btrfs filesystems. It is an offline dedupe combined with an incremental
data scan capability to minimize time data spends on disk from write
to dedupe.
Strengths
---------
@ -18,23 +17,22 @@ Strengths
* Space-efficient hash table and matching algorithms - can use as little as 1 GB hash table per 10 TB unique data (0.1GB/TB)
* Daemon incrementally dedupes new data using btrfs tree search
* Works with btrfs compression - dedupe any combination of compressed and uncompressed files
* Works around btrfs filesystem structure issues to free more disk space than generic dedupe tools
* Persistent hash table and checkpoint for rapid restart after shutdown
* Works around btrfs filesystem structure to free more disk space
* Persistent hash table for rapid restart after shutdown
* Whole-filesystem dedupe - including snapshots
* Constant hash table size - no increased RAM usage if data set becomes larger
* Works on live data - no scheduled downtime required
* Automatic self-throttling based on system load
* Low memory footprint (excluding the hash table)
Weaknesses
----------
* Whole-filesystem dedupe - has no include/exclude filters, does not accept file lists, terminates only when explicitly requested
* Requires root privilege (or `CAP_SYS_ADMIN`) to work
* Whole-filesystem dedupe - has no include/exclude filters, does not accept file lists
* Requires root privilege (or `CAP_SYS_ADMIN`)
* First run may require temporary disk space for extent reorganization
* [First run may increase metadata space usage if many snapshots exist](gotchas.md)
* Constant hash table size - no decreased RAM usage if data set becomes smaller
* btrfs only (bcachefs and xfs are missing various features)
* btrfs only
Installation and Usage
----------------------