10 ms·

Isn't he replacing disk I/O with network I/O, and unless you are talking about SSD isn't the network faster? http://serverfault.com/questions/238417/are-networ

by acg 14y ago

Isn't he replacing disk I/O with network I/O, and unless you are talking about SSD isn't the network faster? http://serverfault.com/questions/238417/are-networks-now-faster-than-disks http://serverfault.com/questions/238417/are-networks-now-fas... Doesn't google's search engine demonstrate this?

brigade 14y ago
It seems unlikely that a Chromebook would have a gigabit link within Google's datacenters.
- acg 14y ago
  That wasn't the point. Is the network really "slower by orders of magnitude" than disk? Why is using the network such a silly idea, considering network speeds are more than keeping up. Was the reference just referring to protocols. I was hoping for some accuracy: something to back up the statement.
  - brigade 14y ago
    No, it was referring to bandwidth and latency. 30ms latency is basically the best-case scenario you can expect for consumer internet (with a nearby datacenter and all that.) 10ms latency is about the worst-case latency for a rotational disk. And almost no consumer internet outside of Japan or South Korea is going to get more than 2 MB/s of real bandwidth, compared to 100 MB/s of real bandwidth from rotational hard drives. Throw wireless or uploading into the mix (who's going to use a Chromebook over ethernet?) and it's even worse.
  - stcredzero 14y ago
    > Is the network really "slower by orders of magnitude" than disk? Congrats on asking this question, because it's a window into a foundational fact of life in computer programming and technology: http://en.wikipedia.org/wiki/Memory_hierarchy http://en.wikipedia.org/wiki/Memory_hierarchy You can feel good about gaining important knowledge. (Advanced exercise: extrapolate from the implications of not having known one piece of fundamental knowledge, then take action.)
Lagged2Death 14y ago
...unless you are talking about SSD isn't the network faster? It was my understanding that most or all of the Chromebooks have (small) SSDs.

by acg 14y ago

brigade 14y ago

It seems unlikely that a Chromebook would have a gigabit link within Google's datacenters.

acg 14y ago
That wasn't the point. Is the network really "slower by orders of magnitude" than disk? Why is using the network such a silly idea, considering network speeds are more than keeping up. Was the reference just referring to protocols. I was hoping for some accuracy: something to back up the statement.
- brigade 14y ago
  No, it was referring to bandwidth and latency. 30ms latency is basically the best-case scenario you can expect for consumer internet (with a nearby datacenter and all that.) 10ms latency is about the worst-case latency for a rotational disk. And almost no consumer internet outside of Japan or South Korea is going to get more than 2 MB/s of real bandwidth, compared to 100 MB/s of real bandwidth from rotational hard drives. Throw wireless or uploading into the mix (who's going to use a Chromebook over ethernet?) and it's even worse.
- stcredzero 14y ago
  > Is the network really "slower by orders of magnitude" than disk? Congrats on asking this question, because it's a window into a foundational fact of life in computer programming and technology: http://en.wikipedia.org/wiki/Memory_hierarchy http://en.wikipedia.org/wiki/Memory_hierarchy You can feel good about gaining important knowledge. (Advanced exercise: extrapolate from the implications of not having known one piece of fundamental knowledge, then take action.)

Lagged2Death 14y ago

...unless you are talking about SSD isn't the network faster? It was my understanding that most or all of the Chromebooks have (small) SSDs.