#HAMMER2
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ijanc.org
HAMMER2 running on OpenBSD: mount, PFS, snapshots, lz4 compression and fsck, WITNESS enabled. First came the import of the fs and its tools, now it's hunting lock order reversals. Still a TODO list, but it's usable. #OpenBSD
September 23, 2026 at 11:33 PM
ijanc.org
First mount/umount of #HAMMER2 on #OpenBSD

A series of screencasts of hammer2 commands in OpenBSD, exploring everyday situations. Today we'll cover mount and umount. Soon I will publish a video (~6 min) applying a kernel patch + userland to get to the point in this video.
May 5, 2026 at 4:33 PM
dendrobatus-azureus.bsd.cafe.ap.brid.gy
Here you can read how ROBUST the HAMMER2 filesystem is

https://www.dragonflybsd.org/hammer/

#dragonfly #dragonflybsd #bsd #freebsd #opensource #lightweight #hammer2 #filesystem #technology #programming
November 24, 2025 at 9:37 PM
ijanc.org
Fixed a HAMMER2 deadlock on OpenBSD, taking a shared chain lock again would sleep if a writer was waiting, and the writer was waiting on us. Added RW_READAGAIN to rwlock(9) for that. It's the 0x202 in the last two rrw_enter calls. #OpenBSD
gdb disassembly of hammer2_chain_lock showing six rrw_enter calls; the last two pass 0x202 (RW_READ|RW_READAGAIN).
September 25, 2026 at 3:02 AM
DragonFly BSD in 2026: Why This Lightweight BSD Is Still a Powerhouse
techrefreshing.com/dragonfly-bs...
#DragonFlyBSD #DragonFlyBSD2026 #HAMMER2 #BSD #Unix #OpenSource #SysAdmin #LightweightOS
techrefreshing.com
November 22, 2025 at 11:17 AM
ijanc.org
Now we have a starting point #hammer2 #FFS #OpenBSD and FFS won the first match. Perhaps lists.dragonflybsd.org/pipermail/co... XOP (executable operation) github.com/kusumi/openb... doesn't appear to have
April 29, 2026 at 12:28 AM
dendrobatus-azureus.bsd.cafe.ap.brid.gy
Additional Reference Material

HAMMER2 Design v6 (08-Dec-2018)

https://gitweb.dragonflybsd.org/dragonfly.git/blob/57614c517203403e7fe4a34c370c7151ba52c539:/sys/vfs/hammer2/DESIGN

#filesystem #programming #bsd #dragonflybsd #freebsd #opensource #technology #no #fsk
gitweb.dragonflybsd.org Git - dragonfly.git/blob - sys/vfs/hammer2/DESIGN
gitweb.dragonflybsd.org
February 5, 2026 at 11:22 AM
nidouille.bsky.social
Lol

Moi, je veux voir arriver HAMMER2 sur FreeBSD
August 20, 2025 at 7:35 PM
teku-a-fool.bsky.social
YEAR OF BSD #os-tan
September 13, 2026 at 3:12 PM
frenchjoe.bsky.social
How’s the blender integration with hammer2? How much of a map can you make in blender?
October 30, 2024 at 9:38 PM
0x0badc0de.bsky.social
Cheers will buy it then. Been using hammer2 and it's lovely but think using blender for everything will pay off more in the end.
February 7, 2025 at 9:29 PM
aboveheerlen.bsky.social
#PlaneAlert ICAO: #3EBD4D
Owner: #GERMANAIRFORCE
Flt: #HAMMER2 # #
Time: 2026-08-28 09:24:15 CEST
Min Alt: 13250 ft
Squawk: #0032
#aircraft over #heerlen - #adsb #planefence by kx1t - sdr-e airplanes flightaware
August 28, 2026 at 7:26 AM
aboveheerlen.bsky.social
#PlaneAlert ICAO: #3EBD4D
Owner: #GERMANAIRFORCE
Flt: #HAMMER2 # #
Time: 2026-08-24 12:14:56 CEST
Min Alt: 5900 ft
Squawk: #0033
#aircraft over #heerlen - #adsb #planefence by kx1t - sdr-e airplanes flightaware
August 24, 2026 at 10:17 AM
aboveheerlen.bsky.social
#PlaneAlert ICAO: #3F4A57
Owner: #GERMANAIRFORCE
Flt: #HAMMER2 # #
Time: 2026-08-13 15:56:49 CEST
Min Alt: 24000 ft
Squawk: #1347
#aircraft over #heerlen - #adsb #planefence by kx1t - sdr-e airplanes flightaware
August 13, 2026 at 1:57 PM
aboveheerlen.bsky.social
#PlaneAlert ICAO: #3F4A57

Flt: #HAMMER2 # #
Time: 2026-08-12 09:50:01 CEST
Min Alt: 15375 ft
Squawk: #0032
#aircraft over #heerlen - #adsb #planefence by kx1t - sdr-e airplanes flightaware
August 12, 2026 at 7:50 AM
aboveheerlen.bsky.social
#PlaneAlert ICAO: #3F4A57
Owner: #GERMANAIRFORCE
Flt: #HAMMER2 # #
Time: 2026-08-11 09:34:45 CEST
Min Alt: 21575 ft
Squawk: #0032
#aircraft over #heerlen - #adsb #planefence by kx1t - sdr-e airplanes flightaware
August 11, 2026 at 7:36 AM
aboveheerlen.bsky.social
#PlaneAlert ICAO: #3EA03F
Owner: #GERMANAIRFORCE
Flt: #HAMMER2 # #
Time: 2026-08-07 09:32:32 CEST
Min Alt: 11450 ft
Squawk: #0032
#aircraft over #heerlen - #adsb #planefence by kx1t - sdr-e airplanes flightaware
August 7, 2026 at 7:34 AM
aboveheerlen.bsky.social
#PlaneAlert ICAO: #3E9C83
Owner: #GERMANAIRFORCE
Flt: #HAMMER2 # #
Time: 2026-07-23 09:04:05 CEST
Min Alt: 11075 ft
Squawk: #0032
#aircraft over #heerlen - #adsb #planefence by kx1t - sdr-e airplanes flightaware
July 23, 2026 at 7:06 AM
aboveheerlen.bsky.social
#PlaneAlert ICAO: #3F976B
Owner: #GERMANAIRFORCE
Flt: #HAMMER2 # #
Time: 2026-07-22 09:29:56 CEST
Min Alt: 18275 ft
Squawk: #0032
#aircraft over #heerlen - #adsb #planefence by kx1t - sdr-e airplanes flightaware
July 22, 2026 at 7:32 AM
rifka.bsky.social
thoughts on zfs vs hammer2?
May 19, 2024 at 6:11 PM
the-real-f1sh.bsky.social
Germany's HAMMER2 (EUROFIGHTER 2000) doing training or probably making rounds around Germany. February 2, 2025 13:43 (UTC).
www.flightradar24.com/2025-02-03/1...
globe.adsbexchange.com?icao=3eafb6&...
#Germany
#NATO
#FlightRadar24
#ADS-B
February 3, 2025 at 2:01 PM
dendrobatus-azureus.bsd.cafe.ap.brid.gy
Quote from Hammer2 page

Because HAMMER2 is a block copy-on-write filesystem, the "atime" field is not supported and will typically just reflect local system in-memory caches or mtime.

The radix tree is dynamic in that each entry can dynamically control how many bits it chops off. This allows […]
Original post on mastodon.bsd.cafe
mastodon.bsd.cafe
February 5, 2026 at 11:35 AM
dendrobatus-azureus.bsd.cafe.ap.brid.gy
The amazing DragonFlyBSD has the fantastic
Hammer2 filesystem:

* Block copy-on-write filesystem
* Instant recovery on mount
* Instant snapshots
* Mounted snapshots are writable
* Automatic snapshotting can be enabled at the system level via periodic scripts
* Default Periodic also does daily […]
Original post on mastodon.bsd.cafe
mastodon.bsd.cafe
February 5, 2026 at 11:18 AM
nidouille.bsky.social
Je trouve HAMMER2 comme étant un bon compromis
August 20, 2025 at 7:49 PM