reverseslayer

So then your saying that going with the sfp28 would not make any tangible difference to the speed of the network. I was also under the impression that Seralizers and Deseralizers were not used on high speed applications anymore, so that one is my fault for not looking too deep into it. Do you think that not having the SERDES in the link would decrease latency? or should I just run the QSFP+ network that Icurrently have because im running the Mellanox IS5022 and finding something thats SFP28 looks to be way more expensive. almost 10x more I also looked it up and QSFP+ is MUX'ed on Single mode fiber and never serialized on Multimode fiber. Each of the 4 channels is its own lane through and through For SMF MMF is Parallel MTP connectors having 8 strands, 4 up and 4 down

I would look for dropped packets or packet errors, not sure how to on ubiquity but if your seeing that your run might be getting interference. Just because the run isnt that long doesn't mean that there could be issues. You could try running the wire a different route to see if that helps. One of the other things I would check but always gets overlooked is, are all of your power cables grounded. The shielding on the switch and cables need to be grounded or its ineffective at shielding rf. If the link speed shows less than 2.5gbit then you could have a mis-wired or damaged Ethernet cable.

Im currently running an Infiniband QSFP+ link between 2 servers which both have 8 drive 2TB nvme raid arrays. QSFP+ is just 4 link aggregated SFP+ connections, so when I use something like SMB or NFS on a file transfer I only get about 1.2 Gigabytes per second max. Which is the theoretical max of what a single SFP+ could do. I haven't tested SMB Multi-channel yet over Infiniband to see how much that helps but im not expecting much unless its hit from multiple angles. What im truly curious about is should I upgrade to SFP28 Infiniband adapters? The overall link is slower at 25Gbit vs 56Gbit but since its a single channel im thinking it might help the SMB transfers. If i had to guess it would be a theoretical x2 on transfer speed. A big plus would be the network adapters, transceivers, and fiber are all cheaper. The only issue I see is that SFP28 is still new so the switches havent come down in price on the used market yet. If anyone has the capability can someone test to see if SFP28 or QSFP+ [is faster on SMB, NFS, Crystal disk mark speed test] is faster for single machine file transfers?

I'm looking into a nvme raid card and I'm wondering if there is a speed or latency advantage for either of these. The price of switched pcie cards is coming down. Ie "Switched" OWC Accelsior 8M2 Eight NVMe M.2 to PCIe Card Compatible with Mac Pro (Late 2019) and PC Towers https://a.co/d/cE9f9i6 Vs "Bifurcated" ASUS Hyper M.2 X16 PCIe 3.0 X4 Expansion Card V2 Supports 4 NVMe M.2 (2242/2260/2280/22110) Upto 128 Gbps for Intel VROC and AMD Ryzen Threadripper NVMe Raid https://a.co/d/jaZkCJI Not concerned about price only performance

I have an iis asp-net server running but recently I noticed that if I was on any wifi connection it works but when I'm on any mobile network the connection stops between the last hop. Does anyone have any clue why this would be?