01:41 <jfhbrook> what is mumimo

02:32 <ec> MIMO, Multiple-Input-Multiple-Output, in terms of RF, refers to ...

02:33 <ec> well, basically, having multiple antennas on both the transmitter and receiver, that are spatially distinct (separated slightly) from one-another —

02:34 <ec> and then because those various antennas have different interference dead-zones and peaks with respect to one another as signals bounce around a room, and with respect to the chosen frequency … software can dynamically allocate frequencies/bandwidth to each antenna pairing such that they receive *different data* on each antenna.

02:34 <ec> it's kinda magical.

02:35 <ec> and the MU stands for Multiple-User — so that different users *at different locations in the room* can be negotiated. i.e. my phone on the couch might be in a dead-zone for a particular frequency that *peaks* near where you're standing in the kitchen, so a MU-MIMO router with multiple antennas can tweak the entire radiating-system to send signals to me

02:35 <ec> that your phone *doesn't even ever see*

02:35 <ec> meaning the receiving device effectively, magically sees less interference when there's multiple devices transmitting/receiving

02:36 <ec> the *real* benefit of that being much higher bandwidth, much higher speed, and thus huge battery-life benefits (because the transceiver spends less time woken up and operating, and more time in ‘sleep mode’.)

02:36 <ec> unfortunately 802.11ac MU-MIMO is *downlink-only* — so it's only effective for downlink-heavy operations like streaming video and shite. technically DL-MU-MIMO.

02:37 <ec> meanwhile there's SU-MIMO, if you have very few wireless devices, which is both downlink-uplink ... but is only useful for as many antennas as *both the AP and the client have*, i.e. most cellphones only have one antenna, except very modern MIMO-capable ones, which have maybe two

02:37 <ec> so in SU-MIMO, only two of those six or eight or wtfever big honking antennas on your modern MIMO router are actually getting used.

02:38 <ec> DL-MU-MIMO means the PS4 you're streaming Hulu on kinda-sorta-pairs to two antennas on your router, your syncing-OTA iPhone pairs to another two, and your Time Machine backing-up MacBook Pro uses two more

02:39 <ec> all done b/cuz of the magical and dynamic measurement of dead zones in the signal? kinda? I guess?

02:39 <ec> hahaha sorry I got *realllllly* in-depth into this today

02:45 <jfhbrook> dang

02:45 <jfhbrook> and here I was happy I was able to install php and dokuwiki on a vagrant box

02:45 <jfhbrook> next steps are to ansible-ize my work, prepare for using it "in prod" and then buy the domain and create the DO box

02:48 <pikajude> ansible

02:48 <pikajude> why not docker

02:56 <jfhbrook> because docker sucks

02:56 <jfhbrook> seriously, I do not like docker

02:57 <jfhbrook> ansible's a good fit for the scale I'm looking at, which is one machine

02:58 <pikajude> oh ok

02:58 <jfhbrook> it's a couple of apt-get calls, a templatized nginx config or two and an untaring/repermissioning

02:58 <jfhbrook> a bit of a wrinkle for turning on and off the "install.php" hook, and who the hell knows with ssl