back to article What links Apple, Sun's ZFS and a tiny startup? Al Gore

GreenBytes, the flash array startup which uses ZFS, bought Mac ZFS developer Ten's Complement last week and is now going to make its ZEVO Community Edition ZFS software freely available from 15 September. CEO Bob Petrocelli said so in a blog yesterday. The product should be enhanced between now and then. GreenBytes has …


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  1. Anonymous Coward
    Anonymous Coward

    Al gore..

    He's like a one man conspiricy theory, responsible for everything from the Internet to Global warming.....

    Sadly, according to Wikipedia, he's baptist, so we cant find the easy link to the Vatican, but i'm sure its there.

    1. Julz
      Black Helicopters

      Re: Al gore..

      The Baptism thing is part of his cover story...

  2. peyton?
    Paris Hilton

    Not exactly enterprise

    I don't find it hard to keep duplicate files at a minimum on my laptop and mp3 player. And while I realize this is probably block level dedupe, I'm still left to wonder how valuable it would be outside of a SAN type environment.

    1. Francis Vaughan

      Re: Not exactly enterprise

      Exactly. It is difficult to imagine how dedupe would make anything more than a trivial difference to a personal computer's persistent storage use. Personal computer file system use is dominated by pictures, audio, movies. All three of these are already compressed. Dedupe makes little to no sense. Indeed it would probably just slow everything down and wear out the flash faster.

    2. Scott Wheeler

      Re: Not exactly enterprise

      Theoretically, block-level dedupe could be useful for individual users for backing up things like Outlook PST files - large files for which small areas change, perhaps on a daily basis. And before anyone jumps down my throat with "PST files are eeevil! Do the backups on the server!", I'm not necessarily talking about an enterprise environment.

  3. An0n C0w4rd

    ZFS dedup, the "official" Sun one anyway, is intensely memory heavy. According to you need over 2GB of RAM per TB of disk for ZFS dedup to work. Some empirical testing on ZFS on FreeBSD ( see ) shows it closer to 5GB of RAM per TB of disk (less if you shove some of it onto L2ARC with an associated performance hit).

    I don't see ZFS dedup as being particularly applicable to laptops/mobile iDevices.

    ZFS compression is more interesting, but you don't need ZFS to gain advantages by compressing certain types of documents

    1. Anonymous Coward
      Anonymous Coward

      iDevices are in the range of 8-64GB of space. At 2GB per TB, that means they'd need 30-128MB of ram for dedup. I'm quite confident they can find a way to give up 30-128MB when the latest iPad has 1GB of memory, and the new iPhone should have even more.

      1. ripratm

        Right but why would a phone need dedup in the first place. Like other posts, the usage for dedup in non enterprise environments is useless. It's not like I have 10 copies of the same movie on my phone, or even my desktop.

        The filesystem integrity portion (while possibly still better than hfs) suffers a loss of most key features by not having more than one disk. The only real key advantage I can think of for zfs would be snapshots and rollbacks. Integrate that with timemachine and you might have something.

  4. MacRat

    Its all about Oracle

    Oracle owns the IP on ZFS.

    Open source doesn't mean patent free.

    1. Oninoshiko

      Re: Its all about the license

      The CDDL includes a patent grant, so it doesn't matter.

      I really should stop feeding the trolls.

    2. P. Lee

      Re: Its all about Oracle

      Any hesitation on Apple's part is probably down to, "do we want to develop zfs on our own."

      I certainly wouldn't rely on Oracle letting me use anything without paying up and Apple are famous for wanting total control.

      ZFS is nice but few apple products have more than one disk so I'm not sure what the driver would be, unless they just feel hfs is getting long in the tooth.

    3. An0n C0w4rd

      Re: Its all about Oracle

      Not entirely. ZFS and its copy-on-write mechanism is strikingly similar to WAFL on NetApp, which predates ZFS by decades. NetApp owns quite a few patents in this space, hence the Sun/NetApp patent spat a few years ago.

      I don't know if the Oracle/NetApp settlement means ZFS users get the patents under the CDDL license or not.

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