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> I have an RPi4 as a home server now. It's not a supercomputer... Out of curiosity, I looked up the performance numbers for the RPi4 and the Cray-1 supercompu

by kens 7y ago

> I have an RPi4 as a home server now. It's not a supercomputer... Out of curiosity, I looked up the performance numbers for the RPi4 and the Cray-1 supercomputer, the world's fastest computer in 1977. The RPi4 gets 748 megaflops on the LINPACK benchmark, compared to 14 megaflops on the Cray. The Cray used high-speed ECL logic allowing it to run at a blistering 80 Mhz clock rate compared to 1.5 GHz on the RPi4. The Cray-1 sold for $7.9 million, compared to $35. It had 8 megabytes of RAM and weighed 5.5 tons compared to 2 GB of RAM and 46 grams. Power consumption was 115 kW vs under 15 watts. The numbers drive home just how much computer technology has improved.

kstrauser 7y ago
To be sure! Our expectations of what a computer required to do $task looks like has dramatically changed, too. Last week a coworker was surprised that I deployed a tiny service on a t2.nano EC2 instance. "Shouldn't we put that on something bigger?" Well, the thing is entirely blocked on waiting for network IO, so putting it on a server with 32 cores isn't going to make it run any faster. Also, under full load it only used 32MB of RAM, so giving it 8GB isn't going to help it any. Bringing it back to the RPi: people ask if it's powerful enough to serve simple web apps and email. Oh, it most certainly is! It can handle most of what you'd want a home server to do, short of something like Plex transcoding.
- jmnicolas 7y ago
  Why not Lambda then ?
  - kstrauser 7y ago
    It's a long-running, stateful process. I love Lambda but this wouldn't have been a good fit for it.
- baebeegeezus 7y ago
  One of my first jobs in 1997 was as a network admin, setting up an email, web server and firewall for our 100 person office. Used a 486 DX2/66 with 16MB (not GB!) RAM running RedHat, obviously very minimal without X or GUIs. The Internet line was only 128kb/s, so the CPU was underutilized most of the time.
  - kstrauser 7y ago
    Hah, much the same here. We were on some sweet Pentium 133s on Debian, and even our blistering fast 4 bonded T-1s weren't enough to make them break a sweat. I know MHz isn't everything, but a 1.5GHz quad-core ARM is abundantly sufficient for running Wordpress and Django and a PostgreSQL backend with plenty of room to spare.
Narishma 7y ago
> The numbers drive home just how much computer technology has improved. And how much bloated software has become.
- rowanG077 7y ago
  Software bloat is part of it. The other part is that we just continue to use slow languages. Using python in production for large servers should be illegal due to wasted power.
  - kstrauser 7y ago
    Why? Most servers are network bound, not CPU bound.
    - rowanG077 7y ago
      Do you have any sources that modern servers which host dozen and maybe even hundreds of virtual machines are network bound? That doesn't seem logical at all.
richardw 7y ago
What is most amazing: what people achieved with those 14 megaflops.

by kens 7y ago

kstrauser 7y ago

To be sure! Our expectations of what a computer required to do $task looks like has dramatically changed, too. Last week a coworker was surprised that I deployed a tiny service on a t2.nano EC2 instance. "Shouldn't we put that on something bigger?" Well, the thing is entirely blocked on waiting for network IO, so putting it on a server with 32 cores isn't going to make it run any faster. Also, under full load it only used 32MB of RAM, so giving it 8GB isn't going to help it any. Bringing it back to the RPi: people ask if it's powerful enough to serve simple web apps and email. Oh, it most certainly is! It can handle most of what you'd want a home server to do, short of something like Plex transcoding.

jmnicolas 7y ago
Why not Lambda then ?
- kstrauser 7y ago
  It's a long-running, stateful process. I love Lambda but this wouldn't have been a good fit for it.
baebeegeezus 7y ago
One of my first jobs in 1997 was as a network admin, setting up an email, web server and firewall for our 100 person office. Used a 486 DX2/66 with 16MB (not GB!) RAM running RedHat, obviously very minimal without X or GUIs. The Internet line was only 128kb/s, so the CPU was underutilized most of the time.
- kstrauser 7y ago
  Hah, much the same here. We were on some sweet Pentium 133s on Debian, and even our blistering fast 4 bonded T-1s weren't enough to make them break a sweat. I know MHz isn't everything, but a 1.5GHz quad-core ARM is abundantly sufficient for running Wordpress and Django and a PostgreSQL backend with plenty of room to spare.

Narishma 7y ago

> The numbers drive home just how much computer technology has improved. And how much bloated software has become.

rowanG077 7y ago
Software bloat is part of it. The other part is that we just continue to use slow languages. Using python in production for large servers should be illegal due to wasted power.
- kstrauser 7y ago
  Why? Most servers are network bound, not CPU bound.
  - rowanG077 7y ago
    Do you have any sources that modern servers which host dozen and maybe even hundreds of virtual machines are network bound? That doesn't seem logical at all.

richardw 7y ago

What is most amazing: what people achieved with those 14 megaflops.