Linked by Eugenia Loli on Thu 24th Jul 2008 00:09 UTC, submitted by irbis
BSD and Darwin derivatives Matthew Dillon has announced the availability of DragonFly BSD 2.0. Also HAMMER filesystem is released with the new DragonFly. Read the full Release Notes.
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Awesome
by kaiwai on Thu 24th Jul 2008 04:18 UTC
kaiwai
Member since:
2005-07-06

End of this year I'm looking at putting together a server for my lounge room, its tempting to get an ATOM based CPU/Motherboard combo and use dragonflybsd. The hammer filesystem will be a great file system for the several terabytes I'm looking at setting up to store movies and so forth on.

For those interested, here is an interesting white paper on the matter:

http://apollo.backplane.com/DFlyMisc/hammer01.pdf

I'd love to see it being ported to MacOS X; the problem with ZFS is that it requires a significant amount of memory due to the nature of its design, so I wonder if HAMMER is the better way to ago around it given that Matthew (in the PDF) states that the difference between Hammer and UFS is small in terms of performance.

Edited 2008-07-24 04:21 UTC

Reply Score: 3

RE: Awesome
by kernpanic on Thu 24th Jul 2008 12:22 in reply to "Awesome"
kernpanic Member since:
2008-03-15

If you have a look at the following:

http://www.dragonflybsd.org/hammer/

It doesn't appear as though HAMMER is designed for desktop systems; it reserves quite a lot of space that it uses for a buffer and you won't get free space back immediately after delete operations - you'll need to wait for the cron jobs to run (that you must set up yourself) before the file system is cleaned up.

It certainly looks like something you would deploy on clustered enterprise hardware but I'm not sure it would replace ZFS on the Mac/FreeBSD desktops any time soon, though I do share your ZFS memory requirements concerns.

Reply Parent Score: 3

RE[2]: Awesome
by phoenix on Fri 25th Jul 2008 19:21 in reply to "RE: Awesome"
phoenix Member since:
2005-07-11

The OP wants to use it on a multi-TB fileserver for storing movies and music. Pretty much an ideal use for HAMMER. It's not like you'll be deleting your library all that often. ;)

Reply Parent Score: 2