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Re: Microsecond latencies
krisi   2/12/2014 12:15:54 PM
"a lot lower than 100ms"? so what is teh number?

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Re: Microsecond latencies
moloned   2/12/2014 12:07:47 PM
I suspect the ISSCC presentation was more motivated by interactive experiences involving video and devices like glass or sensor networks like Nest

In these cases the the latencies required are a lot lower than the 100ms tolerable in an interactive web experience

Mike Abrash of Valve SW suggests the total latency requirement for seamless and motion-sickenss free AR experiences needs to be on the order of 7ms


Paul A. Clayton
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Re: Microsecond latencies
Paul A. Clayton   2/11/2014 7:39:55 PM
The coverage at The Register was somewhat better at explaining the microsecond focus: http://www.theregister.co.uk/2014/02/11/google_research_three_things_that_must_be_done_to_save_the_data_center_of_the_future/?page=3

By the way, the abstract for "The Tail at Scale" ( http://research.google.com/pubs/pub40801.html ) indicated 100 milliseconds as the noticeable latency.


zewde yeraswork
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Re: Microsecond latencies
zewde yeraswork   2/11/2014 4:51:44 PM
Agreed about homeomorphic endcryption. It seems like it is still a ways away, but they are certainly doing everything they can to bring to go after it.

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Re: Microsecond latencies
krisi   2/11/2014 4:48:28 PM
You are absoluetely right...the fastest we can notice a delay is about 50ms

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Re: Microsecond latencies
DrQuine   2/11/2014 1:30:35 PM
From a user experience viewpoint, microsecond latencies in data searches are invisible.  Why not add a 1,000 microsecond delay to allow everything to come together before responding to the user?  They'll never notice the millisecond delay.

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Re: Microsecond latencies
TanjB   2/11/2014 12:56:54 AM
Those who know how to do S2S low latency are not about to explain it here.  Most likely busy building and debugging it and worrying if they will be first to market.

Homomorphic encryptions seem a long way from ready to use.  They take a lot of processing, and will need infrastructure to manage.  When was the last time you used an encrypted signature on your email?  And not because it does not work, it is just so tiresome to organize.

Also it should be sobering to read some of the last 30 years of literature about how to use multiple queries you are permitted to make in order to infer the data you are not supposed to know.  Especially using aggregation operators, exactly the sort of thing which homomorphic systesm are proud to make possible.

Much of that literature was going around during the late 80s, hacking SQL databases.  Probably hard to trace now since it predates the 1994 search wall prior to which no knowledge was in existence.  The other day I threw out the fabulous, timely Spectrum issue featuring the new CEO of DEC (a sort of generational deja vu, think about it) Robert Palmer, then regretted it only to discover that IEEE archives vanish that far back.  Who knows, I might have destroyed the last copy.

So anyway, encryptions with holes through them seem a little tricky to get right, and not just because of the math.  Meanwhile, who are the users?

Your questions make a nice balance.  One has obvious, even desperate consumers and a scarcity of providers.  In the second, the roles swap.

rick merritt
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Microsecond latencies
rick merritt   2/10/2014 6:34:29 PM
I'd love to hear some ideas  both about

--How to lower system-2-system latencies in the data center and

--The outlook for implementing homomorphic encryption

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