I'm giving the Marvell ConnectX cards a second go, as in, a second round of purchases.
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I'm giving the Marvell ConnectX cards a second go, as in, a second round of purchases. I triple checked these are Ethernet capable. All I want for now is to feel the speed of 40gbps.
Maybe later I'll fool around with InfiniBand. I'm looking for a cheap managed switch < $100.
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I'm giving the Marvell ConnectX cards a second go, as in, a second round of purchases. I triple checked these are Ethernet capable. All I want for now is to feel the speed of 40gbps.
Maybe later I'll fool around with InfiniBand. I'm looking for a cheap managed switch < $100.
@lymenzies hmmm, Mellanox ConnectX that is... Marvel also makes RDMA NICs but they are not InfiniBand. All Mellanox CX series (don't bother with CX-3, driver is ancient and power efficiency is bad, CX-4 and newer are good)... those are EN compat (either native or via slowness with encapsulated IPoIB).
I still have eight CX3 QDR-IB Nics — sitting new in a box, same with CX4 100G... they gotta go. I've moved my homelab mostly over to CX5, Qlogic with RDMA, and some Intel (meh) to keep up with specific features (really, CX-6/7 is ideal, but that's a tangent).
40G switch... various options under $100
- Dell PowerSwitch S6000 32-Port 40GbE QSFP+
- Cisco Nexus N9K-C9396PX 48x 1/10G SFP+ 6x40GB QSFP
- MELLANOX 851-0167-01 8-PORT 40GBPS -
@lymenzies hmmm, Mellanox ConnectX that is... Marvel also makes RDMA NICs but they are not InfiniBand. All Mellanox CX series (don't bother with CX-3, driver is ancient and power efficiency is bad, CX-4 and newer are good)... those are EN compat (either native or via slowness with encapsulated IPoIB).
I still have eight CX3 QDR-IB Nics — sitting new in a box, same with CX4 100G... they gotta go. I've moved my homelab mostly over to CX5, Qlogic with RDMA, and some Intel (meh) to keep up with specific features (really, CX-6/7 is ideal, but that's a tangent).
40G switch... various options under $100
- Dell PowerSwitch S6000 32-Port 40GbE QSFP+
- Cisco Nexus N9K-C9396PX 48x 1/10G SFP+ 6x40GB QSFP
- MELLANOX 851-0167-01 8-PORT 40GBPSI don't know why I wrote Marvell, must have had them on my mind.
The price point on the ConnectX-3 cards is too tempting, $25 for the pair. I'd like to see if it's worth the trouble, then upgrade from there.
While I probably do need to raise the minimum I'm willing to pay to get something useful, I have learned a lot from cast-off hardware over the years
I appreciate your recommendations. I'll look into the Mellanox since it's not large and not power hungry.
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I don't know why I wrote Marvell, must have had them on my mind.
The price point on the ConnectX-3 cards is too tempting, $25 for the pair. I'd like to see if it's worth the trouble, then upgrade from there.
While I probably do need to raise the minimum I'm willing to pay to get something useful, I have learned a lot from cast-off hardware over the years
I appreciate your recommendations. I'll look into the Mellanox since it's not large and not power hungry.
@lymenzies ack, the cx3 prices are very good. however, if you want somewhere between 6-8 ConnectX-3 VPI (ie: they do 40G IB and 10G IPoIB) which are like-new in boxes with their cable sets, for free — just cover USPS priority shipping cost (~$15 approx, continental USA).
I learned a lot with used hardware, and really wouldn't have had the opportunity to get to where I am now without that approach. so to spread the sharing-is-caring ethical approach, you are welcome to own them! right now they're hanging out in my hardware stockpile inventory with no intended use. originally I had two of those Mellanox switches for a mini cluster, but I left them at my desk at Fastly just before covid — then they disappeared. cute little blue boxes, very loud fans.
in similar news, I am also giving away other hardware, so if you need other stuff just let me know. if you want low latency more so than RDMA protocols, I have a triple box of Solarflare 10G (see attached), which are formerly very popular with the HFT and distributed computing architectures where PTP time-code syncing is critical for transaction processing without collisions.
Gli ultimi otto messaggi ricevuti dalla Federazione
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BTW, I set up the timeline with a template and memorable address.
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Maybe this is why I don't see the point of chatbots. I've just never had a problem politely asking computers for information and having them answer clearly.
Maybe the unwashed masses are just disabled and looking fof accommodations.
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Set Phone to… Hyperspectral
While our eyes are miraculous little devices, they aren’t very sensitive outside of the normal old red, green, and blue spectra. The camera in your phone is far more sensitive, and scientists want to use those sensors in place of expensive hyperspectral ones. Researchers at Purdue have a cunning plan: use a calibration card.
The idea is to take a snap of the special card and use it to understand the camera’s exact response to different colors in the current lighting conditions. Once calibrated to the card, they can detect differences as small as 1.6 nanometers in light wavelengths. That’s on par with commercial hyperspectral sensors, according to the post.
You may wonder why you would care. Sensors like this are useful for medical diagnostic equipment, analysis of artwork, monitoring air quality, and more. Apparently, high-end whisky has a distinctive color profile, so you can now use your phone to tell if you are getting the cheap stuff or not.
We also imagine you might find a use for this in phone-based spectrometers. There is plenty to see in the hyperspectral world.
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Since React launched, I have been labouring under the misapprehension that JSX was a little-used ECMAScript feature that had been dropped from the standard. But I was wrong! I was thinking of E4X, which worked a lot like JSX, and was supported by Firefox from the mid-2000s to the early 2010s.
https://en.wikipedia.org/wiki/JavaScript_XML
https://en.wikipedia.org/wiki/ECMAScript_for_XML
It's interesting that Facebook decided to reinvent E4X, rather than using the existing standard.
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@sundogplanets Deponia, but it's real life
