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darachennis's profile
Testin Quarantino
Testin Quarantino
Testin Quarantino
@darachennis

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Testin Quarantino

@darachennis

Dilm Firector

Berlin, Germany
Joined September 2008

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    1. Peter Bailis‏ @pbailis 3 Sep 2013
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      Replying to @pbailis

      @kellabyte It depends on the scenario. In general, you could gracefully introduce causality by allowing some violations during migration.

      1 reply 0 retweets 0 likes
    2. Kelly Sommers‏ @kellabyte 3 Sep 2013
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      Replying to @pbailis

      @pbailis Like include the new causality on writes for a period of time before expecting them in reads until coverage is reached?

      1 reply 0 retweets 0 likes
    3. Peter Bailis‏ @pbailis 3 Sep 2013
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      Replying to @kellabyte

      @kellabyte Exactly. Or expect non-upgraded servers to simply continue old behavior and/or have clients check causality in the interim.

      2 replies 0 retweets 0 likes
    4. Kelly Sommers‏ @kellabyte 3 Sep 2013
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      Replying to @pbailis

      @pbailis The more we talk about bringing things closer to the app semantics, more I wonder if we need DB servers or composable libs instead

      1 reply 0 retweets 1 like
    5. Peter Bailis‏ @pbailis 3 Sep 2013
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      Replying to @kellabyte

      @kellabyte Exactly! There are major opportunities for scalability by incorporating application semantics.

      1 reply 1 retweet 1 like
    6. Peter Bailis‏ @pbailis 3 Sep 2013
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      Replying to @pbailis

      @kellabyte In a sense, this is what NoSQL is about. The next step is to ask: if I *also* want to *guarantee* correctness, what's the API?

      2 replies 0 retweets 0 likes
    7. Kelly Sommers‏ @kellabyte 3 Sep 2013
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      Replying to @pbailis

      @pbailis I think you called it fencing? Not clear what the difference is.

      1 reply 0 retweets 0 likes
    8. Peter Bailis‏ @pbailis 3 Sep 2013
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      Replying to @kellabyte

      @kellabyte Well, we used "fence" in the sense of "everyone should observe this write before each of the next writes I perform"

      1 reply 0 retweets 0 likes
    9. Peter Bailis‏ @pbailis 3 Sep 2013
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      Replying to @pbailis

      @kellabyte And, in multi-processor cache coherency, "fence" is used as similar explicit signal for synchronization.

      1 reply 1 retweet 1 like
    10. Peter Bailis‏ @pbailis 3 Sep 2013
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      Replying to @pbailis

      @kellabyte More on this here: http://en.wikipedia.org/wiki/Memory_barrier …; cache coherency is just about as confusing as distributed consistency!

      2 replies 2 retweets 2 likes
      Testin Quarantino‏ @darachennis 3 Sep 2013
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      Replying to @pbailis

      @pbailis @kellabyte Modern multicores are distributed systems except partial failure will likely panic your OS not 'completed maybe' on you!

      4:29 PM - 3 Sep 2013
      2 replies 0 retweets 0 likes
        1. New conversation
        2. Kelly Sommers‏ @kellabyte 3 Sep 2013
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          Replying to @darachennis

          @darachennis @pbailis We're just repeating what telecoms already built. They already handled partial failures at the hardware/OS level.

          1 reply 0 retweets 1 like
        3. Testin Quarantino‏ @darachennis 3 Sep 2013
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          Replying to @kellabyte

          @kellabyte @pbailis Erlang/OTP and Dr Bits work on Platform Agnostic Bit Technology (cc @Omerk - Actor model for hardware madness)

          2 replies 0 retweets 0 likes
        4. 13 more replies
        1. New conversation
        2. Peter Bailis‏ @pbailis 3 Sep 2013
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          Replying to @darachennis

          @darachennis @kellabyte Though "dark silicon" and projects like BubbleWrap (http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.175.2356&rep=rep1&type=pdf …) will change this!

          1 reply 1 retweet 1 like
        3. Testin Quarantino‏ @darachennis 3 Sep 2013
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          Replying to @pbailis

          @pbailis @kellabyte Disable power mgmt. Pop the bubble trouble. Win consistent latency. Blow bubbles for throughput... Nuance, trade off! :/

          0 replies 0 retweets 0 likes
        4. End of conversation

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