Wojciech Puchar wrote: >> >>> What about DragonFlyBSD's new HAMMER FS? I hear it has similar >>> capabilities >>> as ZFS without the overhead. Though, strangely, I haven't really heard >>> anyone discuss it even though it was released some months ago. > > it's maybe pre-pre-prerelease. > > it's not finished yet.
I don't think HAMMER intends to implement a significant portion of ZFS's features. In particular, IIRC Matt specifically said he won't do anything about volume management (the data storage / RAID layer of ZFS) which among many other things means no ad-hoc file system creation. Also, HAMMER needs to be "vacuumed" periodically by design (the reason for this seems to me similar to that of pgsql) which isn't a particularly nice design.
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