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aral's profile
Aral Balkan
Aral Balkan
Aral Balkan
@aral

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Aral Balkan

@aral

I mainly post on my blog at https://ar.al  (RSS: https://ar.al/index.xml ) and interact on my Mastodon https://mastodon.ar.al . Please follow me there.

Terra firma
ar.al
Joined December 2006

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    1. Aral Balkan‏ @aral Aug 4

      Multiwriter Dat could power the next Web (Video + blog post) https://ar.al/2018/08/04/multiwriter-dat-could-power-the-next-web/ … #ethicaltechnology #peerwebpic.twitter.com/fxBlYkencg

      Still from the video: my phone, running the Dat Shopping List demo and my computer showing the desktop wallpaper. The video is shot in the garden with a wooden table and chairs and grass in the background.
      3 replies 25 retweets 56 likes
    2. Sven Slootweg‏ @joepie91 Aug 4
      Replying to @aral

      Is this 'multiwriter' in the sense of 1) allowing multiple devices owned by the same identity to write to the same thing, or 2) allowing things like ACLs to let multiple identities have various permissions for writing to the same thing?

      1 reply 0 retweets 0 likes
    3. Aral Balkan‏ @aral Aug 4
      Replying to @joepie91

      Both. It doesn't manage roles, only a permission binary (can/cannot write) but you can build a system that does manage roles. I'm not sure what the state of removing write access is at the moment but I remember it being discussed.

      1 reply 0 retweets 0 likes
    4. Sven Slootweg‏ @joepie91 Aug 5
      Replying to @aral

      Curious. How does it implement the multi-identity writing, protocol/authentication-wise? I've been experimenting with an 'overlay-and-reconcile' mechanism for one of my own projects, but I'm wondering if Dat might have a better solution.

      1 reply 0 retweets 0 likes
    5. Sven Slootweg‏ @joepie91 Aug 5
      Replying to @joepie91 @aral

      (My solution can more or less be summarized as the 'ACL' consisting of a list of mutable DHT pointers in a single-owner data object, where clients retrieve-and-overlay the current object at each mutable pointer, and the owner eventually reconciles them centrally when online.)

      1 reply 0 retweets 0 likes
    6. Sven Slootweg‏ @joepie91 Aug 5
      Replying to @joepie91 @aral

      (So non-owner writers can independently publish changes to the original data object, and every once in a while the owner combines all of the non-owner changes into the canonical copy, invalidating the overlays, so as to limit client overhead.)

      1 reply 0 retweets 0 likes
    7. Sven Slootweg‏ @joepie91 Aug 5
      Replying to @joepie91 @aral

      (The main issue with my approach - and I'm really using too many parentheses - is that it's easy for one of the overlays to get lost due to insufficient seeding, thereby resulting in an incomplete changeset. Wondering if Dat handles this better.)

      1 reply 0 retweets 0 likes
    8. Aral Balkan‏ @aral Aug 5
      Replying to @joepie91

      I haven't looked into that code yet byt, when I was planning on rolling my own in the same vein, I was going to handle authorisation by signing the public key into the DAG as a special authorization operation node. Deauthorisation would similarly have a special node…

      1 reply 0 retweets 0 likes
    9. Aral Balkan‏ @aral Aug 5
      Replying to @aral @joepie91

      … I'm assuming multi-writer Dat is using a similar scheme but I'll find out exactly how they're doing it.

      1 reply 0 retweets 0 likes
      Aral Balkan‏ @aral Aug 5
      Replying to @aral @joepie91

      Right, it's as I'd said (& documented in the HyperDB architecture document):https://github.com/mafintosh/hyperdb/blob/master/ARCHITECTURE.md#authorization …

      1:19 AM - 5 Aug 2018
      • 1 Like
      • Andreas Pfeiffer
      1 reply 0 retweets 1 like
        1. New conversation
        2. Sven Slootweg‏ @joepie91 Aug 5
          Replying to @aral

          Ah, thanks, that's a good read. Seems a bit similar to my design, but without the 'reconcile' step - how does it ensure that all the entries remain perpetually available? It seems to me like a lost entry could result in an entire branch becoming inaccessible.

          1 reply 0 retweets 0 likes
        3. Sven Slootweg‏ @joepie91 Aug 5
          Replying to @joepie91 @aral

          Also, it seems like it requires on a protocol level that the full history of every hypercore is kept around in perpetuity? Or am I misunderstanding it?

          1 reply 0 retweets 0 likes
        4. Aral Balkan‏ @aral Aug 5
          Replying to @joepie91

          As far as I understand that is a feature/limitation of the design. You should be able to tombstone content but I don't see how you could ensure authorisation without the full DAG. The protocol itself supports sparse data and metadata. I'm still very new to Dat myself, btw.

          1 reply 0 retweets 0 likes
        5. Sven Slootweg‏ @joepie91 Aug 5
          Replying to @aral

          I see, thanks for the commentary :) I'll have a closer look into it some time soon, in particular to see whether the availability properties are better than those of the overlay-and-reconcile model...

          1 reply 0 retweets 1 like
        6. Aral Balkan‏ @aral Aug 5
          Replying to @joepie91

          Look forward to seeing what you're working on too btw :)

          0 replies 0 retweets 1 like
        7. End of conversation

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