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G.fast, HTTP/2, GLUE, WiFi, DFS, DTPC, FMS, RPA

posted Jun 27, 2016, 10:08 PM by Sami Lehtinen   [ updated Jun 27, 2016, 10:19 PM ]
  • Checked out G.fast. Basic stuff: FEC, Reed-Solomon, Trellis Coding, Impulse Noise Protection (INP), Time-Disivion Duplexing (TDD) and Fast Rate Adaption (FRA). Plus naturally some crosstalk problems. Far end crosstalk cancellation. (Self-FEXT, aka g.vector / vectoring)
  • Just so much fun migrating servers and database servers from platform to another, enjoying ultra slow migrations which might still eventually fail. - Business as usual. - Even if not particularly rewarding, until the miracle happens and stuff works.
  • Ubuntu 16.04 Python 3 finally. Golang included, neat. Really don't care about Compiz. LXD, Docker, neat. Yet Golang isn't installed by default, but Python3 is. No need for ZFS, maybe LVM.
  • Apache HTTP/2 support via mod_http2. It would work better than the experimental SPDY module I used earlier which caused seg faults.
  • Uh oh. fglrx deprecated, let's see if I ever get my display adapter to work. I gave up on it about 1.5 years ago, when Kernel updates did break official driver totally and suddenly. Afaik there hasn't been fix for this since. Maybe I'll try after I'll upgrade the primary system to 16.04. I spent several days trouble shooting that stuff and nope, it just won't work, and that's it. Learned a lot more about drivers & X than I wanted to. Some people whine about driver performance. I really don't care about the performance. If it would work at all, it would be much better than whine tuning and whining about some dismal performance tweaks. But that's the usual way, let's improve the performance for 0.5% and break the crap for 50% of users so it won't work at all. Is that a win or fail? Nor I care about CUDA or OpenCL, basic frame buffer would do. But nope, that's too complex for engineers. Well, after 16.04 update I'll try for about 4 hours, then I'll say that nope, it's Nvidia, it's bleep, and won't touch that stuff anymore.
  • I've been thinking about buying a proper display adapter and that naturally doesn't include brands like Nvidia. Been thinking quad quad high definition upgrade. Using four 2560x1440 displays.
  • Makes you laugh when some people work on their laptops. Any laptop can't replace a proper computer battle station.
  • Checked out Generic Layer for Unified Ecommerce (GLUE). It allows web retailers to directly integrate logistics and stock with delivery service providers. Items can be delivered from closes stock as well as be prestored near customers, before orders happen. Yeah, nothing new. Afaik Amazon has been doing something like this for quite a while.
  • Just wondering if anyone has seen 5GHz DFS (radar avoidance) being triggered in Finland when using WLAN / WiFi? If so it would be nice to know about that. I've asked quite a few WiFi network operators and nobody has seen it ever happening. But I assume it of course could happen at any time. Currently using large 5GHz network on channel 140. Curious if that has been happening around regions where there are military areas, airfields or ports? (Hamina, Isosaari, Turku, Hanko, Uusikaupunki, Rauma). Some of the radars are so powerful that you can hear those beams sweeping even on traditional FM radio. Yet I have no knowledge about the frequency ranges actually being used.
  • Exposed node and hidden node problems. Nothing new, that wireless network stuff just reminded me about that. Dynamic transmit-power control (DTPC)
  • Some integrations to one major Financial Management System (FMS) environment. Random integrations are popping up from everywhere. But that's today. Wondering if Robotic Process Automation (RPA) can replace some of these integrations in future. Yet simple integrations can be easily done in a few hours. As long as everyone knows what they're doing. And that's not the case always. As we all know.
  • Something different: MiG-29K