How NASA built Artemis II’s fault-tolerant computer
1–10 of 257 posts
Re: How NASA built Artemis II’s fault-tolerant computer
#2Headline needs its how-dectomy reverted to make sense
Re: How NASA built Artemis II’s fault-tolerant computer
#3The quote from the CMU guy about modern Agile and DevOps approaches challenging architectural discipline is a nice way of saying most of us have completely forgotten how to build deterministic systems. Time-triggered Ethernet with strict frame scheduling feels like it's from a parallel universe compared to how we ship software now.
Re: How NASA built Artemis II’s fault-tolerant computer
#4[dead]
Re: How NASA built Artemis II’s fault-tolerant computer
#5The quote from the CMU guy about modern Agile and DevOps approaches challenging architectural discipline is a nice way of saying most of us have completely forgotten how to build deterministic systems. Time-triggered Ethernet with strict frame scheduling feels like it's from a parallel universe compared to how we ship software now.
> “Modern Agile and DevOps approaches prioritize iteration, which can challenge architectural discipline,” Riley explained. “As a result, technical debt accumulates, and maintainability and system resiliency suffer.”
Not sure i agree with the premise that "doing agile" implies decision making at odds with architecture: you can still iterate on architecture. Terraform etc make that very easy. Sure, tech debt accumulates naturally as a byproduct, but every team i've been on regularly does dedicated tech debt sprints.
I don't think the average CRUD API or app needs "perfect determinism", as long as modifications are idempotent.
Re: How NASA built Artemis II’s fault-tolerant computer
#6The quote from the CMU guy about modern Agile and DevOps approaches challenging architectural discipline is a nice way of saying most of us have completely forgotten how to build deterministic systems. Time-triggered Ethernet with strict frame scheduling feels like it's from a parallel universe compared to how we ship software now.
I take the opposite message from that line - out of touch teams working on something so over budget and so overdue, and so bureaucratic, and with such an insanely poor history of success, and they talk as if they have cured cancer.
This is the equivalent of Altavista touting how amazing their custom server racks are when Google just starts up on a rack of naked motherboards and eats their lunch and then the world.
Lets at least wait till the capsule comes back safely before touting how much better they are than "DevOps" teams running websites, apparently a comparison that's somehow relevant here to stoke egos.
Re: How NASA built Artemis II’s fault-tolerant computer
#7The quote from the CMU guy about modern Agile and DevOps approaches challenging architectural discipline is a nice way of saying most of us have completely forgotten how to build deterministic systems. Time-triggered Ethernet with strict frame scheduling feels like it's from a parallel universe compared to how we ship software now.
I take the opposite message from that line - out of touch teams working on something so over budget and so overdue, and so bureaucratic, and with such an insanely poor history of success, and they talk as if they have cured cancer. This is the equivalent of Altavista touting how amazing their custom server racks are when Google just starts up on a rack of naked motherboards and eats their lunch and then the world. Le…
You mean like this?
"With limited funds, Google founders Larry Page and Sergey Brin initially deployed this system of inexpensive, interconnected PCs to process many thousands of search requests per second from Google users. This hardware system reflected the Google search algorithm itself, which is based on tolerating multiple computer failures and optimizing around them. This production server was one of about thirty such racks in the first Google data center. Even though many of the installed PCs never worked and were difficult to repair, these racks provided Google with its first large-scale computing system and allowed the company to grow quickly and at minimal cost."
https://blog.codinghorror.com/building-a-computer-the-google...
Re: How NASA built Artemis II’s fault-tolerant computer
#8The quote from the CMU guy about modern Agile and DevOps approaches challenging architectural discipline is a nice way of saying most of us have completely forgotten how to build deterministic systems. Time-triggered Ethernet with strict frame scheduling feels like it's from a parallel universe compared to how we ship software now.
I take the opposite message from that line - out of touch teams working on something so over budget and so overdue, and so bureaucratic, and with such an insanely poor history of success, and they talk as if they have cured cancer. This is the equivalent of Altavista touting how amazing their custom server racks are when Google just starts up on a rack of naked motherboards and eats their lunch and then the world. Le…
> ...they talk as if they have cured cancer.
I'd chalk that up to the author of the article writing for a relatively nontechnical audience and asking for quotes at that level.
Re: How NASA built Artemis II’s fault-tolerant computer
#9How big of a challenge are hardware faults and radiation for orbital data centers? It seems like you’d eat a lot of capacity if you need 4x redundancy for everything
Re: How NASA built Artemis II’s fault-tolerant computer
#10How big of a challenge are hardware faults and radiation for orbital data centers? It seems like you’d eat a lot of capacity if you need 4x redundancy for everything
They dont go into here.. but I thought that NASA also used like 250nm chips in space for radiation resistance. Are there even any radiation resistance GPUs out there?