zfsp
Infrastructure
filesystem
SHOW HN2019
How HN took it
7 positive, 10 neutral or asking, 2 mixed, 11 critical, out of 30 comments about the project. Thread score +0.04.
Idea: 4 for, 2 againstPerformance: 0 for, 5 againstDesign: 0 for, 3 againstDocs: 0 for, 1 against
The thread, comment by comment
Each row is a top-level comment and its replies, in HN's order. Select a cell to open that comment on HN.
positive neutral or mixed critical about another commenter or something else the maker
What HN said
What people liked
Impressive and fun reverse-engineering work
From 3 comments
What?! How?! Why?! This is the greatest thing ever. I wish I could just write code for the fun of it. Every time I wonder whether people will use it and give up before I even get…
AlexanderDhoore on HNHell yeah, dude. This is awesome.
gaze on HNThis is all kinds of funny. I'm awash with awe and admiration.
RantyDave on HN
Useful as a documented reference implementation for other ports
From 1 comment
It's capable of doing IO against a real ZFS array without any other code. ARC is an implementation detail and not necessary for correctness. If you removed ARC from ZoL it would…
lunixbochs on HN
Objections
Python is too slow for a filesystem
From 3 comments
PyPy is faster than Python, yes. But Go, C and many other (compiled) languages are way faster than PyPy. Plus, if you use a language like Go or Rust then you avoid Python's GIL…
cure on HNMaybe plenty fast for most applications but a filesystem is not one of these IMHO, especially for something as naturally resource hungry as ZFS. A good filesystem implementation…
GuB-42 on HN> Plus, if you use a language like Go or Rust then you avoid Python's GIL No, but then you run into Go's GC and green threads. File systems fit squarely in the realms of "systems…
deaddodo on HN
Title overstates it; it is a userspace reader, not a full ZFS implementation
From 3 comments
Bad title. It’s not a ZFS implementation, so hold your horses.
lelf on HNYou don’t need CDDL to use ZFS. Which is all the library does. It does not implement ZFS.
lelf on HNNo ARC/L2ARC? Edit: of course not. This is actually just it’s just a ZFS user-facing ”front-end”, not a ZFS implementation.
lelf on HN
Requests
Write-up of the reverse-engineering process
From 1 comment
This is awesome! Do you plan on blogging anything about how you went about reverse-engineering?
4oo4 on HN
Zfs send/receive compatibility
From 1 comment
Might be interesting/useful to aim for zfs send/receive compatibility :) And thanks for the Borges callout.
randrus on HN
Questions
Whether the CDDL applies to this implementation
From 2 comments
Would the CDDL matter for a python implementation that will never become part of the kernel?
newnewpdro on HNYou'd want a reverse-engineering lawyer, so be certain. But my (IANAL) guess is: If this is a proper reverse-engineered implementation, you could then convert _this_…
CaliforniaKarl on HN
How the implementation was built without a specification
From 1 comment
Pierre Menard, author of The Filesystem. But I'm surprised this is possible without a specification - how can you test a filesystem through hexdumps? The effects of some…
ivanbakel on HN
Alternatives named
TFS, a ZFS-inspired filesystem in Rust
From 1 comment
There's also TFS a ZFS inspired FS in Rust https://github.com/redox-os/tfs
adamnemecek on HN
ZboxFS, a userspace filesystem
From 1 comment
There is an userspace implementations of filesystems ZboxFS: https://github.com/zboxfs/zbox.
burmecia on HN