 infrastructure review. This review is being translated in a lot of languages and we don't know yet which one but the C3 lingo team will be on stage and will tell us how and well it what it did and I like to start as Always and every year with the knock right, so please give the knock a hand. Let's party. All right everyone Welcome to the state of the interest internet manufacturer report. This is JC I'm Momo and we're going to talk to you about what we did this year for the network So obviously organizing a Congress is a quite tedious task took us about six months of free planning We came in on the 15th Did a fiber day and then it took us from the 18th and will take us till tomorrow To tear everything down with like 20 to 40 people and we'll be busy wiping every device because that is actually what we do Every year we delete everything. There are no locks leaving this building And this will take us probably the next 24 hours So yeah for the usual numbers Edge capacity this year because you didn't use the internet last year We only brought you 300 gigs, but that was fine as well as I suppose We had 100 gig from high-come here in Leipzig 100 gig from Deutsche Telecom and as well as 100 gig from b-kicks Which we got via and dvwdm wave to Berlin In the core we used juniper mx960 mx480s mx204s and qfx10k in the Yolo Kolo Basically all the halls were connected via a 200 gig link and Yolo Kolo had three times hundred gig As probably the last five or so years were using isis and bgp for our protocols of choice and This year we also first of rejected RPKI invalid routes and secondly applied for the first time at Congress Bcp38 ingress filtering to be a good internet citizen and not to allow you to spoof IP addresses So yeah, that was nice As Congress keeps on growing we have two and a half thousand tables Somewhere around the building in all the assemblies, but we only have 300 switches So sorry if you had to bring a long cable and if you have switches spare with 10 gig up links and period plus Feel free to donate them to us Access and Wi-Fi we had like 300 access switches. We are obviously again running a rubah Wi-Fi controllers This year like at camp. We had a few dot 1x access points more than that later We tried to use Juniper VMX to route the Wi-Fi traffic and yeah had quite a shitload of Switches most of them from Juniper Some Cisco 2960 some brocade switcher new to us and some crappy old HP stuff Which is basically configured for us to work like a brick you get from like eBay or whatnot. So yeah We had a few incidents this year We'd like to talk about first off We had I'm not sure if any of you noticed quite a lot of packet loss and missing route advertisements and the Wi-Fi This was caused by some weird Juniper VMX behavior. We couldn't figure out what it was So we had them running in a redundant VRP setup. We shut down one of them and then it worked. So yeah fuck redundancy There was a pixel flute client which somehow messed up his IP address and Caused a broadcast storm which took down most parts of how to we We found them shut it down and deployed stone control to all and into all our access switches Yeah to the Congress motor resource exhaustion Someone was running aggressive set map scanning Or over the whole internet came by our Wi-Fi access controller and caused a state table Exhaustion and that brought it down. We now wrote the source and yeah, that's this was this issue so thank you to whoever was that and in the morning of day three we had a Another issue with Juniper VMX where it forgot it had a network card. I would re-booted it and everything was fine again So yeah some numbers you actually managed to use more bandwidth, thank you, but it's still only 20% of our uplink capacity So use more 20% of that was IPv6, which is good, but could be more We had like of 11,000 clients in the Wi-Fi 86 percent 5 gigahertz 96 in a peak We had 11 802 dot 11 ax clients our favorite one was obviously the one with the Loveful a lovely house name. I love the knock So yeah, but that number with we have 96 percent 5 gigahertz obviously shows us that we are finally at the point where we can say Thank you 2.4 gigahertz. It was nice. Goodbye Also, obviously, thank you to our sponsors We couldn't do this if we would not get like 10 millions of list price obviously equipment and loan and Quite a lot of services. So give them a round of applause as well. Thank you And obviously knock not only stands for network operation centers, but if you extend it is no co2 So we believe in green power and clean traffic and therefore we obviously see that Sustainability sustainability is a great part of our role. This is why we even use old crappy HP switches to cut our Limes for our chunk to serve your cheeseboards, whatever you need here also We somehow estimated what our network will run us in co2 and this was about 11 tons We're not very good with Mars weren't very good with co2 missions, but this was roughly what we came up with and To make Congress or the world a bit better place. We actually offset all our co2 and yeah bought 11 tons of co2 missions So yeah, and now Fredrik's gonna tell you how we got all those numbers. Yeah As a good internet manufacturer, we also do monitoring a lot and we run our own Prometheus server inside You probably know the dashboard that we propagate all over the internet and that's powered by Prometheus We have an internal Grafana that is part of this whole ecosystem And if you are a little bit of a nerd you might have clicked on the dashboard sections and seen that there are more dashboards than this We fill our graph our Prometheus with lots of different sources. We get SNMP data from and Screw SNMP, but it does a quite good job at getting all the insights We need from all the network equipment. We have no dex, but our influx and all that but we got a decent amount of data from everyone in the Congress ecosystem and we had that at camp as well where we got the water pressure of the showers and We get the colo power which also helps with estimating the co2 footprint and Everything is being configured by net box which is a tool that is an asset database and Yeah, as I said, we have lots of dashboards and graphs Of course the public one where you can see lots of different things From everyone. This is only part of it. If you scroll down on the dashboard, you see a lot more But this helps everyone to have a good understanding of what it and what's happening currently and We even draw a nice little Christmas trees on the Wi-Fi traffic for you That is mostly because it's a router on a stick and we cannot measure it correctly So yeah, we have an internal dashboard which gives us a little bit of a status for build up mostly which switches and routers are up and That gives us a very quick site of all the devices that are out there What's broken? What's not broken? We improved a little and now have alarms So someone can look at stuff and see if things are broken run out there and fix it Yeah, we also built weather maps as you can see that's a little bit of a mess, but we couldn't do it better because Yeah, the the graphing library doesn't allow us to do it better If someone has a good idea to do it better in Grafana or anywhere else With sources from Prometheus, please come to us. We're happy to talk But this shows our core and all the links between it and how much capacity is being used red Indicates that it's used more heavily We also have that for the Yolo Kolo and all the traffic around it as well and Yeah Teardown starts now, please don't touch our equipment and if you want to come and help please come to Hall of Four and Get in touch. We always need helping hands, but please in an organized way. Don't disassemble switches or access points We have lists and everything we need to account for everything So please come to Hall of Four if you want to help and yeah use more bandwidth and offset more see you too Thank you so Thanks a lot actually because you are clearly the backbone or one of those many backbones of the conference Is there any queue? Let's do Q&A for like one or two questions. Is anyone having a question right now? Ah someone is standing upright so microphone number one, please Hey, we've absolutely don't be here We've absolutely don't be 30 it in previous years, by the way, sorry for my second, sorry So this was wanted to correct the record. We've been good netizens in previous years as well. Oh You're right. Thank you Was there another question or something else to correct them because they clearly don't know what they're doing Yeah, feel free microphone number two so if 2.4 gigahertz is over what's going to happen to all of the ESP 32 In various IOT devices are they going to have a home here next year? They'll definitely have a home But as usual we cannot support it as good as we can on 5 gigahertz because obviously this band is overused and yeah Not even remotely suited for that amount of clients we put in it Follow up for the ESP 32 How exactly can you locate them through the wireless if they are lost? Well, we can't We can basically look at which access point they are and then if someone really would want to we could start triangulation But we've never done that before so yeah, we can just pin them roughly to an access point Maybe we can ask C3 enough next time. So please give the knock a hand Thank you So The next team up is the park Do we have to click this by himself use more bandwidth? I'm going to try Thank you your stage Thanks. Hi, my name is Maria Hi, and I'm Gavin and we are from phone operation center and we want to talk a bit about the phone infrastructure at this event Yeah, so we arrived at day minus six and planned on hacking some things and socializing and we planned a team event, but Then everything was different Yeah, then we arrived and I went into the knockoffice and yeah, they said to me your CCL is up internet is up Everything is just working nicely. You can start hook up your telephony system right now and I was like whoa So thanks a lot knock really great performance this year. We were amazed nobody expected that it works so well Yeah, so we put up the first antennas and then we decided to have our team event anyway and And Yeah so We did a lot of things so we handed out 150 Loan decks and we deployed 51 zip telephones. We also deployed 67 antennas and we had a Pog party on day three until 7 30 a.m So you can see almost everything is done. I guess the remaining things are not that important So this is the overview of deck coverage in At the event only level zero because otherwise I think it would be overcrowded to show just so that you can get a rough impression on How many antennas we deployed in order to give you this deck coverage that you can be reached almost everywhere in the event and that you can see how our tooling looks like where we see how good the antenna see each other and That we can see that seamless handover work so that you can start at our desk Walk through the area into the lounge and just continue talking And oh, there are also some antennas that are outside of the building. Hmm. What could that be? That is our hotel decked and you can see a typical Hotel decked installation on the photo and people got really confused about it because we also had decked coverage at main station Yeah, so I got a call roughly at 4 p.m. In the morning and Somebody told me oh my my deck rang. Why? Now I need to turn it off at the night. Why did you do this? Yeah, so we also had problems We have a new feature since camp where you Can see your deck devices and can assign them to your number before you even arrive And then everything is set up and you don't have to call your token anymore And people got really confused because they called their token anyway, and it calls its invalid So we had to explain a lot of these Unaccepted unexpected simplicity to them And then we had a battery issue this year We had not enough batteries and you know batteries are always empty in the phones when it's the most important So we were thinking on what what can we do about that? So we built a new device. That's our Unmelded micro valley and it can also charge Devices so many things to 3c power C3 power because they helped us with tooling and actually They have expertise to put power cables on devices like this Thank you very much In the last yes, we were often asked how expensive is your service actually? So we decided that we now provide invoices so you can see how expensive our service is And we sent out a lot of invoices and we got paid Some money, but as you can see on the invoices most is sponsored by ccc Yeah, and people also paid with sweaty. It's really awesome Yeah, and also people so people have have invoices on a fraction of a cent and they got quite creative on how they can So yes some more stats. We have 7473 registered Extensions. Oh, we didn't remove this So we were thinking on how to compare this with things and we were looking at villages in Saarland And then we thought this is stupid comparison, but we didn't remove this So there are five thousand twenty one attached deck phones and three thousand two hundred fifty one concurrent deck Phones with it, which is about more than thousand more than last year. So thanks a lot for using decked Yeah, we had there are also max 120 calls in parallel and We had more than 300,000 calls in total That's also really very really much we had five eating meetings at heaven at heaven angel eating place and There were an average of 42 eating meeting life viewers We had two lectures you can see them on media cccde and we had 23 super fast charged phones in our microwave Like the knock we also had to deal a bit with issues during the event And actually there were some DDoS attack on our account system and somebody configured Over 4,000 extensions with really stupid names And it took us quite a while to get rid of them again cleanly from the system because the synchronization turned out to be Really slow so you can see it took us a while to get them removed again. So We can only say yeah, I mean you all know it's a hacker congress, but it's kind of stupid to hack your own infrastructure Yeah, so as a consequence of this We only allow now only 50 extensions for per account and per event if you think you need more feel Feel free to contact us if you have a valid use case So every device has an e-pi that is like a MAC address and we ask Responsible institution to give us the manufacturer But it's a release It's really secret so they don't give it to us So we ask you for help Please enter the models of your devices for your phones and then we can match to the e-pi and get Some data to build more or some features for you Yeah, this would really help us and the only way for us is to crowdsource it because it seems to be super secret Whatever you can find it in the Google on the device page And there's this little pen and if you click on it then you can enter the model Thanks upfront and Yeah, that's from us and I guess now we have a little time to ask for you to ask questions great, so Any questions for the park I Don't see are they where they're correct or do we have to? Okay, so someone's setting up It's a microphone number one, please Yes, a few years ago. It was a translation service via decks Might is the capacity enough to service also this crowd Yeah The problem is that we'd switched the phone system a while ago Last year at the Congress and the old phone system Had a way how we can do the translation via one one channel and the problems that the new system doesn't support this Let me say the new system doesn't support it yet. So I Have a look at our talk and then you can see that there is there is some potential So I see someone at microphone number three, please and this would be the last question because we have to hurry a bit Can I know a little bit more about the super charging microwave? I'm confused Yeah, sure you can come to our park desk and then we answer all your questions. Oh Mystery we can give the pocket hand Thank you So Next team is it from the GSM crew someone there Ah We have to I see I see some chaos possible. We have to wait one round. So GSM guy. Thank you. I'm going to I am good with the Computers. I think yeah, I am 42 have fun If it's working not Look at this smile, then it looks better 42 23. Can you hear me? Try this yeah, I try this Maybe you you have to use GSM Hello, hello So as every year we ran our own mobile phone network at the Congress using Osmo comm open source software for 2g and 3g and open 5g is interfacing with the Osmo comm HLR and all you need to take part is a sim card that you can buy from the pock and For five euros you get a flat rate The price increases because we have less sim cards every year. We need to manufacture new ones You can even call outside like you can with decked phones And Yeah, that's you already. Yeah, hello. I'm links is So as every year for the GSM for the GSM team the first problem is the license That's the first step usually because in in Germany You have to get the official form gets a license and but where do you get? How what can you ask for for frequencies because for example the pork? Vifers or the DCT or vifers. It's just you place it. You can use it. You're fine But for GSM they didn't thought about it or for 3g or 4g. So Yeah, this year we we usually get the license mid of December. Maybe Starting of December. So it's always late Yeah, so this year we we didn't got all our licenses So But we get some we got 850 megahertz which is not assigned in in Europe because it's usually in the US only used but we have a small hole and We got this year. We got the 4g license instead instead of a 2g license with 10 megahertz from Telefonica so thanks Telefonica for borrowing us the spectrum So and just a short example how the spectrum looks like so the yellow stuff is usually some Somewhere behind actually by the way this microphone It might share share the same frequency with us, but so far we haven't Found any interference together with with the walk but yeah down there. You can see the small hole which we are using And because of we didn't got the 2g license there and we thought okay, let's take a look can't we fit them both in the same frequencies and It's not good, but you see the spike this nice antenna on the right. That's a city of them, which is Sending on the same frequency it works because they're using different coatings, but I've heard from people who know more about our F that's not the way you use it So we we took some photos of our base stations This is actually the fairy dust from the 2g base station So you have a look idea what we are using here we have even more fairy dust on our 3g femtocells and Our 4g cells they are looking like a small toaster They are taking actually 90 watts via PoE. They have special poe adapters so maybe we could ask if somebody can Do a similar adapter to get even running a toaster on the line So basically for the 4g setup this year We wasn't sure if it's stable enough or we lose all our phones to the LTE and they don't like to come back to to the To the 2g 3g setup where we have voice because on LTE we don't have yet voice So you have to select them specifically to join the LTE network That work quite fine. If you change it so your phone will register everything fine there Yeah, so I'm back. So the rollout this year. We had voice working on day zero, which is new and Someone even noticed on mastodon. I saw it too and We already had LTE at the CCC camp this year, but unfortunately we lost the crypto password. So LTE rollout took a bit longer this time Sorry So some numbers in total we saw just about 1100 people doing a location updating on our network and 845 event phone tokens were dialed on the GSM that is 2g or 3g and There were roughly 200 phones subscribed actively subscribed on the network at all times and even though we basically only deployed 3g nano stations in all the halls and only had two 2g BTS's in the in the glass huller There were roughly more than half of all the phones were still subscribed on 2g Instead of 3g we had like 18 3g stations and only 2 plus 1 In the and the GSM room 2g stations. So that's a bit surprising and SIM cards Starting from the bottom we sold about 700 SIM cards, but only saw half of them activated which is curious and luckily most or some people bring old SIM cards from previous years and It's not so easy to get cards manufactured So we are very glad for everyone who brings old SIM cards from previous events We might even consider introducing Charging phone calls for only for SIM cards that are newly bought So if you want to continue calling for free rather bring your old SIM cards So you see The numbers are not going to go through them and you can also get the ADM the admin keys for your SIM cards If you like to write to them Or if you have seen the talk from LaForge, you might want to play with the SIM cards We give out all the keys you want to have to play with it So operation was mostly smooth except iPhones for unknown reasons and Accept the data service which might even be related because maybe Apple is a bit more strict on whether data service is working reliably Yeah, we still had some problems in the SGSN since introducing 3g changing between the radio access technologies is a whole new ballgame So there's still some bugs in there And as you see we had many more tickets than the Pock This is actually it's reversed from the Pock that the done is on the left So this whole bunch of stuff is done and there's some backlog and cancelled and fantasy tasks and worked pretty nicely Yeah, you're taking over oh Yeah, no, this is still mine and this year. We actually had also a denial of service attack and The code was the same as previous years and we never saw this before but this year We got an invalid mobile identity which managed to crash our mobile switching center and Thank you very much for uncovering this bug and thanks to fix area for fixing it on a 2 Ever since the mobile switching Center for voice and SMS and subscription has been running stable Maybe some interference Yeah, we we covered the old phones again So last year we couldn't support them, but we managed to implement the missing parts old phones could work If they support the frequencies, so that's really nice Maybe next time So but since camp we also did Nice angel head test and it was really impressive to see that we even had to add more shifts more shifts to we have so many Motivated angels or thanks everybody who who helped us and it was really great Unfortunately, we don't have enough time for Q&A, so please give them a hand for everything that did Thank you so They're quite a lot of teams Next like I count at least like eight maybe nine, so we need to speed up a bit our next team for now will be We don't have working microphones Okay, so tell them cows post cows post Hello. Oh, okay. Sorry guys. Let's get rid of the broken one because it's not working anyway, so All right, sorry, we are interrupting for a few minutes only we would like to deliver a few statistics as well So thanks of all we had a multiple chaos deliverers working throughout the whole Congress 24-7 basically delivering at the speed of chaos as our mission statement clearly states So thank you therefore first of all, thank you very much to all of you who contributed to that So let's have some numbers because you all have numbers, right? So we delivered about 3,000 external postcards So that means with like outside chaos so to the real world or the default world as we call it We delivered those to over 40 42 countries all over the world So you guys are really good connected internationally and we also we don't have exact numbers But we estimate around 3500 no 35,000 internal postcards and and You also use our online office for a total of 789 times so that is only 15 less than camp and that was a longer event So hey you guys write a lot of postcards as you might already know from camp We also do have a few special services as already on camp. We had the Serving proposal so basically a pre-assembled test you had just had to cross what to write The postbox certification and of course the bi-directional chaos in Germany also known as einschreiben mit Rückschein Wow and This time we also offered some new services. We had like sang telegram so gesungenes telegram off in Deutsch We had a forever alone box for people wanting to write postcards with or exchange postcards with no idea who to write it to We had love letters, so we had some nice pre-assembled text and also a really nice selection of perfumes for scented postcards You could write some secret messages We had some UV pens and also we had some Yeah, let's say call it. Let's call it security because or rather temper evidence because we had some scratch off stickers for you And also we had over 30 new postcards designed that you could use for postcards Short annotation a short remark Short remark for the love letters and the perfumes. Well, that was kind of not really thought through it was a bit It was fun sorting them out and Stamping all of that smelling all the perfume all the time Yeah, and then brushing your hands really thoroughly because well that stuff gets on your hands when you do that also for UV pens Just a little remark. It's not a good idea to use it for addressing and the message You can think the rest. Yeah All right, then let me close up We also supported major jail this year and we had hundred and thirty letters for activists in prison Which I find really great. I think that's something we can all support so Amazing So thank you all for this amazing event and have some fun for the rest of the Congress So the next team is the the walk. Yes, you can have it Here the rock and we only have 20 minutes left in total for every team. So you know what to do hurry up welcome guys so Yeah, we don't have as many statistics as usual, but we have some great stories. So we'll hurry up So this year in total we covered ten stages apart from the five stages that we do usually for Congress we had We had streams from the critical discernies decentralization cluster send it sent on wiki paka wiki open infrastructure orbit cows west and a total we served 255 hours and 35 minutes of total talks talk time So, you know what to do until next Congress and of course sustainability was a big topic during this Congress. So Part of what we have to do is stream re-encoding so you can Run it you can watch it with the VP five codec or use it at lower resolution And so far we've been using for zion based machines and to desktop machines and Thanks to hardware based encoding. We now replace this with a single laptop as you can maybe read this is critical infrastructure now and It's and we are for for all the streams for 30 re-encoding streams. We are in a 45 watts power budget now And as an edit benefit because we also encode the master slides with hardware encoders and hardware encoders can generally use a higher profile at That allows for better quality in real time. You now get a better picture as well So, yeah, and of course we had some minor fuckups This year we thought the audio setup was a bit less complex But like when we checked rooms we had buzzing everywhere So we replaced some SDI alliance with fiber and turns out buzzing goes away then the PA sound console had had a buggy Dante card and after you rebooted them the auxiliary out to the Vogue cameras was muted so that messed up a particular talk That has been Re-done today, but other than that we are rather happy And we figured that two or three of our audio mixers were actually had broken outputs I don't know how we did that but it clearly shows that they've been used on one event or another during the last years which is actually a good thing we may think and Yeah On the Vicky Parker stage We did not use ansible because they were sort of a playground for us, but if you don't do things properly Well, then you run into edge cases with things and Yeah So I need to hurry up Yeah, and one virtualization host suddenly started leaking memory and So if you were affected by that during the main talk seasons in the evening, we are very sorry about that Updating the colonel helped and we have no idea what happened Yeah, and ice cars got stuck as well and some real life So if you want to see talks later that may not be possible because we ran temporarily out of space But if you watch this on media CC CDE And the talks were not yet released. We have real life integration so they talks show up in media CC CDE even though there is no proper release yet for your convenience and Main track and assemblies are now integrated in all events So you don't have to click through for the separate events to find your favorite talk and Now I pass to Pat to talk about Vokta mix 2 Yeah, thank you Okay, I have no 20 seconds. I think I Might a redesign of Vokta mix. It's now called walk to mix and for Peter was doing that meme some weeks ago because we had to switch to Vokta mix 2 and we wanted to try it in two rooms and At the end of the night from day zero to one we decided to do it for every Stage because the old solution was not working anymore. That was a little bit hot but it worked and The new the redesign caused a new UI completed with some new base features we had have now transitions where pictures are moving and We have insertions for for Blending text into the picture and we have a new audio mixing and we are now proper AV zinc in every case I think and Some mixer angels were exploring the software and as they found some bonus features like a random video distortion in some cases Which I have to fix I think and the party mode where you click some buttons and they are clicking Without any doing of the user and everything is flickering and they're called it party mode This is what the current pipeline looks like we have now over 200 g-streamer elements doing all the stuff to get your pictures, which you are having on the stream and in the recordings That's it So and of course there were some some issues. I Mean work to mix to essentially rewrite Actually, we are stealing time from the other teams Okay, so I might call it a quid. Okay. Okay. Okay. So I Yes, I know, but you're not making things better. So one thing to mention We had to fit we had to deploy a sweaty finger fix after the first After the first talk was after the first talk started There is that read them now read them now read them read them read them read them read them Please give walk a hand Thank you so What's next? Next oh the stage manager and Harold operation center. I'm part of it and we have 36 heralds Every one of them very eloquent and good-looking and then we have 70 stage managers and stage supporters We had 150 shows on official stages and the assemblies On top of it. We had one stage fright council yet for the speakers and who took care of at least six talks And then we threw away over a hundred hosting cards On day one only so clearly give a hand for the shock So next see three power Your time so my name is Arab guy I am from the power team and from the radio operation center We make the power we load five double trucks of shit out on Sunday the 15th We deploy a lot of power boxes and many of cables. So we have teardown today So every help is needed. So we have only one day to bring us back The main thing we had the power meter But we make on the camps this year. We have two nice setups on the Sauron's age. So you see the power factor is very bad and the other one was The raffle operation center. So we see they have a nice power factor So please use my omic device like he does raffle irons or something The other have some we have only five see if you monitor Yolo Kolo You have on cease cease three power point top. We had the Grafana link and we also link it to the Main Grafana to the to the nog and also nice thing. We have the lounge. So I have a view here I don't know how it's He started now and you can see the current on all see faces to the to the audio and you can see the audio from the lounge and It's very nice Are you see any of the only thing is? use more brass for mark more currents or Later, we will we can show you another side. You can be stuck back to the slide and Go to the next slide, please So even the radio team, maybe you have 120 portable radios We are up limbs update them to new firmware and New programming software with a new feature is a lot more slower than the last version Very nice 550 bring your only base radios five that radius on the camp To that from the X and I see two dead repeaters from the camp one that are rival on this stage through rent through rental repeated from two companies when we pick up and Hanover just before the Congress and Even the windows PC crashed down on that on arrival. So pushing it as usual. So so next team So The next is the C3 subtitles. I think it's Amy and Julia Amy It's there or not So C3 sus SOS. It's you. Okay. Okay. Sorry. Oh, I'm sorry not not the subtitles. It's wow Sustainability Your stage go for it here. Feel free. Hi. No, okay. Hi. My name is Amy. I'm part of the C3 sustainability team I only have four slides. So I'll be very quick You can see the first of our biggest projects was the drinking water dispensers So for angels we had drinking water from a dispenser rather than from bottles and they could refill their bottles We go through some stats there So when we started planning how difficult it was to implement it the locations and how many volunteers Satisfaction was very high for this one. So thank you to C3 galp who really helped to organize the water dispensers with us We're very help. They were really great. Please give them a round of applause Thank you The next the next one was a give and take electronic boxes So we wanted to encourage people not to throw away their electronics Of course, they can be recycled. So we have deployed 10 boxes You can find them in the sticker stations and we did this in combat collaboration with the hardware hacking area Thank you and other assemblies. Oh, wow. We're really fast. I am. Okay Others are waiting. Okay. So the the last one I wanted to go through We have two initiatives on this one. I'm sorry for the trashy trashy picture there We have organic bins in the halls. It was very very difficult to do this And but actually it was quite satisfactory But I would say there's room for improvement there and there was also an initiative for recycling cigarette butts So we actually had two people go around collect your cigarette butts and they will be recycled into Ash trace what a success Thank you so much to everyone who collaborated with us. We couldn't do it without your help. Thank you your pause, please so Unfortunately the C3 sign is not coming So just take a look at those pictures while I go through them and now the next one is C3 assemblies Here take this one. Thank you. Be quick. Hi, my name is Pingu I'm here for the assemblies team and I just want to ask give a hand Who haven't found his assembly on day zero or day one? So then give a big applause to C3 enough because they really helped us a lot the C3 enough Because without them it wasn't able to do this event just for us because For some figures we had four hundred ninety's Assembled to place on on this area, which is about thirty five thousand square meters We had three tables 3000 tables all over two thousand five hundred in the assemblies with six thousand chairs and here Please give a big applause to the C3 mobile house or IKEA as you call it Because because the mobile house basically placed all the tables in a magic night on Yeah, basically they managed to and they will disappear with the help of C3 mobile house today We assigned the last assembly on day zero at 2200 and we started our work in mid-October is with daily meetings with weekly meetings and Yeah, as you can see it was a lot of work and And oh Thank you. Thank you. And just one thing for tear for tear down For tearing down the assemblies, please take this chairs on the assembly and leave but leave every Stare chair and every table on the assemblies. We will get rid of that. Thanks a lot your plows So the next one I'm also fine with that We translated all the German talks into English all the English talks into German all in all 15,000 minutes in seven different target languages and here's from the second language team Who talks all the non English and German things? Okay, so basically we did have some About one third of the talks what translated to French If yeah, you can read the rest and we even have currently exactly right now one other one which is translated into Swabian, so if you want to listen into it Which means that if you were listening to a talk there is a two chance out of three that it was translated not only once But twice into either French Spanish Russian or Polish One special mention for the Russian and Polish teams. That was their first time this year. So one big round of applause for them, please And one more big thing about for the guys who bought the cough candy and the cough drops in the booth That's a lifesaver. Thanks. Ah, thank you. Merci beaucoup so We have some hard operation going on here. You have to switch it or not Whoa, you're good with computers Well, he just So C3 infrastructure you from the subtitles your stage Yeah, my microphone. Haha So thanks Just just a quick look into subtitles. So what what do we actually do when we subtitle a talk? Well, first of all, we take the video from the C3 walk and put it through speech recognition Just to get a rough transcript that we can then give to angels to actually correct because well machine speech recognition Doesn't work so good at all And then once we have a working transcript that humans have looked at we put that through auto timing Which just takes the transcript and aligns that with the audio and that usually works pretty well And well once that is finished then we actually have working subtitles But we give them to angels for another round of review just to fix any mistakes that got overlooked And maybe sometimes the timing needs to be adjusted and then when that is done Well, the sub title is released and actually one of our angels Did a nice chart about all this process that you can see here. That's also on Twitter. So thank you for that Well, so no no presentation without graphs As you can see the the important thing is really everything goes up and to the right On the on the bottom here. We have finished Seconds of transcribed talks. So this is really completed subtitles here And it starts already quite high because it includes all the congresses before Then we have stuff that has been reviewed In an orange stuff that has been timed but not reviewed yet in yellow and well transcribed But not yet timed stuff in green so All in all we had 144 distinct angels. Yeah, I need to hurry up 71% of which took two shifts and 10% took seven or more shifts So 433 hours of work for 126 hours of material and so far we've had six releases from this congress and then lots of hours work all of All of these numbers are at least as high as last year's numbers. So good. Thanks When you have transcripts you can do it cool stuff with that So for example generate word clouds to see what people like in this case People seem to like people and questions and time which we don't have any here. So Well, how do we actually keep track of all these complicated stuff? Well, we use the state of the art no SQL log free column our data store Like many of the other teams also do and well Thank you all of our angels for for your hard work and also thanks for the heaven for for supporting us and Then well if you if you feel bought between congresses you can still continue to work on transcripts You have all the information here. These slides will be online. Follow us on Twitter and thank you So so please do your thing again like your check know a thing again like you Take your laptop So this was the last one I think we I will try my best to do something like this too actually I am not good with computers, but I know someone who is and who takes very great care of every one of us so one of my Highlights of every cotton rest feel free the lock Hello, I'm the stand-in for lock as with all good projects. They're too busy for documentation. They're packing So lock doesn't have anything. I'm more of the Department of Health and Safety again so for everyone we Have the message from assert that there were no work related accidents that caused real harm The odd broken mod matter bottle maybe but thank you for having built a city again safely and Orderly even with all the chaos For the people who are driving please make sure that the drugs wear off and that you get some sleep and Follow people riding along. Please keep the guys awake. That would be greatly appreciated Go home safely. Thank you very much Okay, so I'm very sorry to have to rush some teams And I'm very sorry that we don't have any time left We are one minute over and I promise to tear down crew to not do overtime. So please Please Give all the teams their respect and clap and trim as loud as you can for now to finish Everything they did for us. We did for them. Why are you still sitting? You have to leave. Thank you from the C3 infrastructure review. Good. Bye