Linus Torvalds has announced the first release candidate for version 2.6.22 of the Linux kernel, noting that the changelog itself for this release is just too big to put on the mailing list. According to the kernel-meister himself: "The diffstat and shortlogs are way too big to fit under the kernel mailing list limits, and the changes are all over the place. Almost seven thousand files changed, and that's not double-counting the files that got moved around. Architecture updates, drivers, filesystems, networking, security, build scripts, reorganizations, cleanups... You name it, it's there."
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Member since:2005-07-08
If you follow the linux kernel mailing list you'll find that most of kernel hackers don't care or even bother about ZFS. ZFS is mostly a user request, not certainly a kernel development goal. Linux kernel hackers don't even think that ZFS is that interesting as much as some people does, nor they feel that Linux is inferior. Most of them agree that Sun marketing is great and has a lot of effect though.
Edited 2007-05-14 21:51
Member since:2006-01-19
If you follow the linux kernel mailing list you'll find that most of kernel hackers don't care or even bother about ZFS. ZFS is mostly a user request, not certainly a kernel development goal. Linux kernel hackers don't even think that ZFS is that interesting as much as some people does, nor they feel that Linux is inferior. Most of them agree that Sun marketing is great and has a lot of effect though.
Yes, of course, the famous Not Invented Here syndrome.
Those pesky users and their requests can be annoying to the enlightened. Everyone knows all you have to do is use LVM2 for snapshots.
Everyone who has never used ZFS, anyway 
Not to mention the value of automatic, transparent checksumming on block IO to detect or correct corruption before it is too late...
Member since:2005-07-08
No way. No only would the Linux community need to re-implement it using a clean-room procedure, but we'd also need to steer clear of the dozens of patents Sun holds on ZFS. Even if Sun follows through with their plans to license OpenSolaris under the GPLv3, it still can't be ported to Linux without being completely re-written. Unless Sun wants to distribute a Linux distribution with ZFS support, they will not license it under the GPLv2, and I'm inclined to think they want to keep this as a differentiating feature for Solaris.
The way forward for enterprise storage on Linux appears to be doublefs, which combines a ZFS-style COW filesystem with a log-structured filesystem as an on-disk write buffer. It should offer the same kinds of features as ZFS (100% metadata consistency, atomic transactions, inexpensive snapshots, etc.) while providing reduced write transaction latency. The idea was conceived leading up to the 2006 OLS by a former ZFS developer and other Linux hackers. I'd be surprised to see it hit the mainline before the end of 2008 unless some huge corporate Linux supporter decides that this is crucially important for competing against Sun...
Member since:2005-07-07
The way forward for enterprise storage on Linux appears to be doublefs, which combines a ZFS-style COW filesystem with a log-structured filesystem as an on-disk write buffer. It should offer the same kinds of features as ZFS (100% metadata consistency, atomic transactions, inexpensive snapshots, etc.) while providing reduced write transaction latency. The idea was conceived leading up to the 2006 OLS by a former ZFS developer and other Linux hackers
I don't like the sound of that. I can see the lawsuits coming already.
Member since:2006-01-19
The way forward for enterprise storage on Linux appears to be doublefs, which combines a ZFS-style COW filesystem with a log-structured filesystem as an on-disk write buffer. It should offer the same kinds of features as ZFS (100% metadata consistency, atomic transactions, inexpensive snapshots, etc.) while providing reduced write transaction latency. The idea was conceived leading up to the 2006 OLS by a former ZFS developer and other Linux hackers. I'd be surprised to see it hit the mainline before the end of 2008 unless some huge corporate Linux supporter decides that this is crucially important for competing against Sun
Can you link this? I am confused since this (doublefs) does not sound (in details) a lot like what you describe (though it may be a good idea):
http://lwn.net/Articles/190224/ (scroll down a bit)
On the other hand this (dualfs) sounds more like what you describe, but still not quite:
http://lwn.net/Articles/221841/
Neither mentions snapshots, though.
Member since:
2006-12-23
ZFS?