Linus: Don't Use ZFS

Post by sudosysgen » Fri, Jan 10, 2020, 1:28 PM UTC

celticmusic wrote: post #177

gh123man wrote: post #77

Earlier quoted context omitted.

I am also not an expert in this space - but if I understand correctly the reason the linux Nvidia driver sucks so much is that it is not GPL'd (or open source at all). There is little incentive for Nvidia to maintain a linux specific driver, but because it is closed source the community cannot improve/fix it. > Why are all drivers expected to use the GPL? I think the answer to this is: drivers are expect to use the G…

My experience is that linux nvidia drivers are better than the competitors open source drivers.

Post by notacoward » Fri, Jan 10, 2020, 1:32 PM UTC

rhinoceraptor wrote: post #432

notacoward wrote: post #422

Earlier quoted context omitted.

> when you read, zfs will check the data on both and pick the correct one. Are you sure about that? Always reading both doubles read I/O, and benchmarks show no such effect. > there's no way for the fs to tell which is correct This is not an immutable fact that precludes keeping the RAID implementation separate. If the FS reads data and gets a checksum mismatch, it should be able to use ioctls (or equivalent) to sele…

The fact that traditionally RAID, LVM, etc. are not part of the filesystem is just an accident of history. It's just that no one wanted to rewrite their single disk filesystems now that they needed to support multiple disks. And the fact that administering storage is so uniquely hard is a direct result of that.

Post by wolfgke » Fri, Jan 10, 2020, 1:36 PM UTC

notacoward wrote: post #418

morning_gelato wrote: post #337

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Danese Cooper, one of the people at Sun who helped create the CDDL, responded in the comment section of that very video: Lovely except it really was decided to explicitly make OpenSolaris incompatible with GPL. That was one of the design points of the CDDL. I was in that room, Bryan and you were not, but I know its fun to re-write history to suit your current politics. I pleaded with Sun to use a BSD family license o…

This needs to be more widely known. Sun was never as open or innovative as its engineer/advertisers claim, and the revisionism is irksome. I saw what they had copied from earlier competitors like Apollo and then claimed as their own ideas. I saw the protocol fingerprinting their clients used to make non-Sun servers appear slower than they really were. They did some really good things, and they did some really awful t…

Post by deadbunny » Fri, Jan 10, 2020, 1:38 PM UTC

cogman10 wrote: post #186

Seenso wrote: post #42

Earlier quoted context omitted.

> The benchmarks I've seen do not make ZFS look all that great. The thing about ZFS that actually appeals to me is how much error-checking it does. Checksums/hashes are kept of both data and metadata, and those checksums are regularly checked to detect and fix corruption. As far as I know it (and filesystems with similar architectures) are the only ones that can actually protect against bit rot. https://github.com/zf…

> those checksums are regularly checked to detect and fix corruption. I don't believe that's true. They are checked on access, but if left alone, nothing will verify them. From what I've read, you need to setup a cron job that runs scrubbing on some regular schedule.

Post by thomasfedb » Fri, Jan 10, 2020, 1:41 PM UTC

stiray wrote: post #321

Jonnax wrote: post #4

Here's his reasoning: "honestly, there is no way I can merge any of the ZFS efforts until I get an official letter from Oracle that is signed by their main legal counsel or preferably by Larry Ellison himself that says that yes, it's ok to do so and treat the end result as GPL'd. Other people think it can be ok to merge ZFS code into the kernel and that the module interface makes it ok, and that's their decision. But…

Btrfs crashed for me on two occations, last time, around 2 years back I have installed zfs (which I am using for ~10 years on FreeBSD server) which works like a charm since then. I understand Linus reasoning but there is just no way I will install btrfs, like ever. I rather dont update kernel (I am having zfs on fedora root with degular kernel updates and scripts which verify that everything is with kernel modules pr…