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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Gentle reminder,
Only 16 hours leftTick tock
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throwing pikmin at my inbox and running to the other end of the map and hoping they read and answer all my emails
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My dumb ADHD brain is annoying and terrible at letting things go, but I guess it has a point... this time. XD
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@globalistIT
SI, assolutamente e decisamente SI.
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By the way, here's what I believe was the final published frequency list and schedule for the AT&T high seas service, (a souvenir of one of my visits to the station before it went off the air).
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I should note that while the site (and its cousins) had a number of large discone antennas like this one, they were mostly there as backups in case the main antennas (which included truly massive wire rhombics oriented toward various oceanic regions) or transmitter combiners failed.
The old Bell System did not mess around.
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Ships on the high seas still occasionally make some use of shortwave radio, but its importance has greatly diminished over the last few decades. The Coast Guard still maintains a "watch" on emergency shortwave frequencies, listening for distress calls, but most transoceanic ships are now equipped with more modern, higher-bandwidth satellite communications systems.
Places like this are what the Internet looked like a century ago. Infrastructure is often heroic, and occasionally looks the part.
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There were three AT&T radiotelephone sites in the continental US, each with its own transmit and receive antenna farms: Ocean Gate, NJ (shown here, serving the North Atlantic), Miami (serving the Caribbean and the Gulf), and Point Reyes, CA (serving the Pacific).
All the sites have by now been razed, either for redevelopment or as nature preserves. The antennas (including this one) are mostly gone now.
