DragonFly 5.6.0 has been released. This version brings an improved virtual memory system, updates to radeon and ttm, and performance improvements for HAMMER2. Matthew Dillon did some informal testing of the VM improvements, and posted results to the users@ list.
My users@ post has the usual details on upgrading (pay no attention to my 5.4 typo), as do the release notes.
I love me some dragonfly
Hi!
How does hammer and/or hammer2 on single HDD behave at power outages (in an workstation scenario)? Linux with EXT4 or XFS have no problems.
Recently, I used FreeBSD 12 stable with ZFS (again, on a single HDD) as my main graphical workstation, happy with the performance, but after a series of power outages (frequently in my zone), some errors showed up at boot time and, even if the system was still working, my confidence disappeared. I am back on Linux Fedora + XFS now, but I always looked at DragonFlyBSD as more than a file server.
Thank you!
HAMMER is intended to come back immediately in the case of a power failure – no long fsck.
http://man.dragonflybsd.org/?command=HAMMER§ion=5
HAMMER2 is I assume the same – look at the design document around line 129:
https://gitweb.dragonflybsd.org/dragonfly.git/blob/57614c517203403e7fe4a34c370c7151ba52c539:/sys/vfs/hammer2/DESIGN
I recall Matt was testing HAMMER when first designing it by loading up a machine with a very heavy disk load, then yanking the power cable out of the back. And then repeating it, over and over. So yeah, designed to handle power loss as well as possible.
Thank you very much @Justin Sherrill!
This is very encouraging!