4 ms·

For institutions on the leading edge, the extra bytes incurred by the IPV6 ethernet frame make it a non starter. 160 bits for IPV4 vs 320bits for IPV6 @ 10GHz i

For institutions on the leading edge, the extra bytes incurred by the IPV6 ethernet frame make it a non starter. 160 bits for IPV4 vs 320bits for IPV6 @ 10GHz is a 16 nanosecond penalty on every message you send.

organsnyder 8y ago
With those sorts of requirements, it seems like firms would find value in using a different layer-3 protocol (perhaps even custom) to reduce that overhead further.
- Misdicorl 8y ago
  Yep, the microwave links are often using custom layer 3 tech (1 byte messages!). Beyond that, you need to vertically integrate a hardware shop and get custom layer 3 hardware, otherwise you're not going to beat off the shelf Arista/Cisco switches doing IPv4 routing. Also, at the end of the day, you need to be shipping your bytes to an external consumer (e.g. an exchange), so you're probably going to need to have an IPv? layer at some point anyways.
  - organsnyder 8y ago
    It's crazy the lengths to which trading firms are going to squeeze nanoseconds out of latency. It makes me wonder what value we're getting, from a societal perspective.
    - Misdicorl 8y ago
      Better network tech =). You can probably thank trading for consumer 10G now and 40G in ~5 years.
      - amluto 8y ago
        I doubt that’s true. HFT is big business but nowhere near that big. Keep in mind that a lot of the big HFT players failed a few years back due to revenues being too small to support the R&D operations. I think that what really made 10G affordable is trickle-down from the SAN world.
        Misdicorl 8y ago
        Yeah you're right, above is a bit sensationalized. I think it still probably had a (positive) impact on pricing and time to market though
      - blackflame7000 8y ago
        Yea you can pick up a PCIe 10G adapter for $40 on Amazon and a 4 port 10gb dlink switch for $200
    - blackflame7000 8y ago
      It's all about finding and capitalizing on arbitrages in the market the popup and disappear all the time in the blink of an eye.
amluto 8y ago
I suspect this makes no difference whatsoever as long as everyone is forcibly migrated at once.
- Misdicorl 8y ago
  You can only forcibly migrate the edge protocol. There will still be competition for small ethernet frames to execute against geo arbitrage opportunities. What you'll (likely) see is internal networks on V4 and V4->V6 translation switches at the edge so you only pay the 16ns cost on ingress/egress.

organsnyder 8y ago

With those sorts of requirements, it seems like firms would find value in using a different layer-3 protocol (perhaps even custom) to reduce that overhead further.

Misdicorl 8y ago
Yep, the microwave links are often using custom layer 3 tech (1 byte messages!). Beyond that, you need to vertically integrate a hardware shop and get custom layer 3 hardware, otherwise you're not going to beat off the shelf Arista/Cisco switches doing IPv4 routing. Also, at the end of the day, you need to be shipping your bytes to an external consumer (e.g. an exchange), so you're probably going to need to have an IPv? layer at some point anyways.
- organsnyder 8y ago
  It's crazy the lengths to which trading firms are going to squeeze nanoseconds out of latency. It makes me wonder what value we're getting, from a societal perspective.
  - Misdicorl 8y ago
    Better network tech =). You can probably thank trading for consumer 10G now and 40G in ~5 years.
    - amluto 8y ago
      I doubt that’s true. HFT is big business but nowhere near that big. Keep in mind that a lot of the big HFT players failed a few years back due to revenues being too small to support the R&D operations. I think that what really made 10G affordable is trickle-down from the SAN world.
      - Misdicorl 8y ago
        Yeah you're right, above is a bit sensationalized. I think it still probably had a (positive) impact on pricing and time to market though
    - blackflame7000 8y ago
      Yea you can pick up a PCIe 10G adapter for $40 on Amazon and a 4 port 10gb dlink switch for $200
  - blackflame7000 8y ago
    It's all about finding and capitalizing on arbitrages in the market the popup and disappear all the time in the blink of an eye.

amluto 8y ago

I suspect this makes no difference whatsoever as long as everyone is forcibly migrated at once.

Misdicorl 8y ago
You can only forcibly migrate the edge protocol. There will still be competition for small ethernet frames to execute against geo arbitrage opportunities. What you'll (likely) see is internal networks on V4 and V4->V6 translation switches at the edge so you only pay the 16ns cost on ingress/egress.