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Pat Packet Visits Ruby Rails

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but the blue and the time of our it said you know a a a a a a all so that all know that is the this was the most of the time so and I variations in his 1st year other words of what's called the of the of the of the rest of the of the of the of the
of the of the of the of the of the of the of the of the of the of the of the of the of the of the
of the of the of the of the grammar and all of but they on the side of life and the here and what happened is the 1st of all it was the 1st part of this thing all the
or the 1st is the work in the light and all and and the actions of the or the of that is proud of it
and this is so if you know so the the the the the the yeah yes so you know there is no problem at all that you know
the the overall and the last year of the law in the the the thing
at you the have at the end of the year and so on and so on and so forth and so this and
so I have and the pirate's so that is how it is the the has the last the of the has the right to say what you were saying that you know it's kind of you are close in and also you also know that you have the right the work and this is all the way in which you say what you hear the of the crowd structures which is the 1 that the 1 once in while the along with the sound
as you know I was in the US government soldiers in this part of this whole thing is that the world so that was going to be as small as 3 and when you read it here in ADS level you have all all of of the of the the leader of the reports on the radio over fiber and all of the acts as a because I had in the almost lost my that that
the that the whole thing was that was used in the theory is theory the latter is the way I had said the issue was that of a lot of you I have grown and and this that and the have and the other half of you half of the course well as a as a and OK and the the that you have lost in the back of hello
the out of the cell and that of the matter is you and I said that I had the in the in the world happened and you have a formula so you have a a grade and that was the the fact that you have
to have something that has a list of the most of the old so that the rest of the world and
I know of where the pattern is in the form of the of the of the of the you know the people in said the world was a region and in our religion all at the time of the year in new all the year all of us have
had the honor or the the the the last class just color in as well as the best out of
that and I the long list of the 1st on the rest of the the the the the the the the the US after the fire a hole in the wall in the West as a lot of the of the part that there's
a little bit of the work that goes on in the last half of the course you find and it has a lot of work what was the last the last information on the on the on the on the left and the right of work is on and there was a sign that the order all of the and is the most of the variance and generally and I say to you and that sort of background the of the work of the so finding the worst of the worst of all at the same the work in the in US in the I C so that it was the size of the letters of the of the
and in this case in the side of the self in the rest of the world and the fact that this is the the the hassle so I think that there is something that you find a wide number of workers that this this the is all
about and that is the of the this is a list of all the other is the year of life except the
last of the of any 1 you understand that that's what you know I have all of the all of the content of the quality of what a data is that most of us know what it is that the move in in the context of the of the of the this is the area it was the have the use of the 2 that are at the time was that the
gas was the only thing was the was the result of that set and the status of this and this is the 1st time that has a lot of the time I would like to have a look at the whole life of the grace was
found in the following way is the is the loser the assess the without i is the fact that the work is more than just that he's not at the end of the sentence and the word she said the world where around the capital and the fact is that more than what was it about the top of the world and the question about what the I stand by and say that and it was found that the use of this type of this in the out of it had to doing requests you really know your http pay Thanks for explaining that to me I think I'm ready to deliver this package that's saying the
package to find the address for the from the kingdom he knows that the host addresses Ruby on Rails start word on started Pat when we deliver this I don't understand this host address I thought addresses were just numbers Pam applied off this sounds like a perfect time for you to learn about DNS let's go with a puzzled look on his face have proceeded up the warehouse with PAM to deliver the package as pattern Pam exited the
warehouse asked what is DNS payments dinner stands for the domain name system to answer your earlier question yes addresses just numbers however in the world of when they're over 4 billion addresses there is even a new number format that has more addresses the that therefore it's difficult for our clients to remember the addresses of the recipients DNS allows recipients to advertise their address with more memorable domain names like the host edges Ruby on Rails downward it's up to us to then use DNS to determine the actual address for the domain name sometimes we keep a copy of the address for short time but I couldn't find 1 for Ruby on Rails . were willing to make a stop at the resolver kingdom in the highest peak continent to get the edges so let's take the UDP express train it using the fastest way to get there after several miliseconds they arrive at the resolver kingdom we found the resolution office step through the door Pan greeted the office workflow
ran my friend pattern I need the address for a domain name Ren responded Capon great was the domain name you need to resolve its Ruby on Rails start award ran walked over to his volcanic began a search after quickly thumbing through his records he raises had with a disappointing look sorry we don't have an address for that domain name right hand will need to retrieve it from 1 of the of authoritative DNS kingdoms interjected pack the
inferring packs lack of knowledge on DNS ran replied yes because there are so many addresses it's not feasible for all the resolver kingdoms keep records for every address therefore the actual domain name records are distributed among all the authoritative kingdoms authoritative means they the final say on the address for domain name we only keep copies of addresses as time and storage in our file cabinets allow same were little short
staffed today would you mind finding the address and its authoritative kingdom normally we retrieve the King addressed from the appropriate kingdom while you wait here however this would be a great opportunity for you to understand the units better I know your friend Pam here is done it before so you'll be in good hands sure that sounds great thanks this will help us immensely red-handed pattern slip of paper and continue here is the address for the root domain kingdom a that should be a good place to start pattern Pam with the
resolver office hop back on the GDP express at the address to the conductor and off they went again several
milliseconds later they arrived at root domain kingdom a as he stepped off the train pattern a large building in the distance and marveled at the number of Korea's entering and exiting they entered the building enjoying 1 of the lines at the front desk after a short time clock motion and for welcome to the root domain
kingdom How may I direct you Pat responded hello we need the address for Ruby on Rails that word without even hesitating the clock replied i . words here are a few ns kingdoms to try the clock print off a list and handed it to pat pat visibly confused in quot even just a bunch of is the go with other domain names where is an endospore Ruby on Rails that word right we don't keep any records on individual domain names like all we have our in this records on the enhanced kingdoms for the top-level domains you'll have to ask those kingdoms for more help 80 records in S records top-level domains a still befuddled pet as Pam stopgap speaking to the 3rd thank you so much for your help will be on way Pampel
science and don't worry this is how the universe works we need to deliver this package students let's get over to 1 of these in asking kingdoms OK I trust you when I'm still confused sorry from the scene back there butts deliver this package rate I'll explain more about the intercept we visit the and asking after another trip on UTP express the arrived at 1 of the dot war in asking nodes just like the last time the inner large offices approach the front desk clerk greeted them hello and thank you
for coming to the a 0 . org kingdom what can I do for you today have applied with this request we need the edges for Ruby on Rails downward please do you have it the clerk Cercas records in Ruby on Rails . 4 hot pets eyes grew wide in anticipation the clock printed off a slip of paper handed it to pat this will get you to your destination with a smile at Davis thinks this you have walked away he began to read the paper his smile slowly faded away these are more in this records all of the same place he excluding we start with an as followed by a number and then DNN-step decay it seems like these DNS kingdoms key given us the run around not at all
respondents and like I said this is how DNS works I promised I would explain everything selects for the training and not verify how DNS works back on the
train can address that OK I don't want you to be confused let's walk through the analysis the units is a recursive and iterative system we use to determine addresses for domain names if we don't already have a copy of the address the normal we go to our local resolver like earlier next figure of the local resolver a recursive requests for an address what that means is that they will try whatever they need to do to obtain the address if they don't have a copy of the address already then they will take an iterative process defined it from another kind you and I have undertaken the iterative process this time so you can understand how resolvers work to retrieve the Addis's we careers need this iterative process is crucial to ensure a DNS kingdoms can reasonably store the billions of addresses and domain names therefore it has a higher optical structure that starts with the real domain kingdoms the root domain kingdoms are responsible for storing addresses for the top level domain kingdoms top-level domains or teal these for sure are just categorical named used in domain names you've already seen that word which is primarily used by organizations other popular visa . com . net and I O which start love there are numerous other tildes as well the root domain kingdoms and out in this records to the steel D kingdoms which are like referrals the root domain kingdoms are essentially saying I don't know where Ruby on Rails . work is but I can direct you to someone that has a better shot at next but
shielding kingdoms to something similar usually a t the kingdom only knows about nest kingdoms regular kingdoms like the prune the kingdom were were headed l'emploi at least 2 of these enhance kingdoms to advertise the Ruby on Rails duckboard head-dress in turn these in kingdoms will register with the Teal deep kingdoms then when request comes to the t of the kingdom's
they can hand back referral in its records to the NSA he knows that know about the final contrast finally the remember earlier when our resolver friend ran mention of authoritative DNS kingdoms these s
kingdoms which will visit next are typically the authoritative key and they have the final say on addresses for regular kingdoms therefore they hand out aid were seen name records in a records are known as host records they finally give the actual edges for a domain names seeding records are like aliases if Ruby on Rails . org wanted to advertise another domain name like Ruby on Rails for the win . com making use seen a record that aliases back to Ruby on Rails . 4 the benefit of this over a record is that if there edges changes they only need update 1 18 record for Ruby on Rails stop word that alias will still work because it still points to whatever actress Ruby on Rails . on points to therefore we see that the DNS
kingdom the structured in a distributed hierarchical manner they are recursive and that the higher levels of the system will yield to the lower levels to eventually get an address for a domain name this allows addresses to be stored in the same year more efficient manner albeit at the cost of more time to retrieve an address this delay in time to and
obtain an address also known as latency is also at higher levels like the resolver will save a copy of the edges for a while after they retrieve it if the Resource Resolver receives another request for the edges and they can use their copy avoid the extra latency to retrieve it from an authoritative kingdom wow it all
makes sense now if all the kingdom stored all the Andersons that would require a lot of storage it would also complicate keeping addresses up to date and all the kingdoms exactly thank you for explaining that I am I feel better now latency sounds pretty important so we need to get a move on no doubt unfortunately we're always limited by distance will do our best after we get the address from the last kingdom
pattern can finally arrive at 1 of the interesting things like before the interval large building in that with 1 of the clerks at long last the obtained the endospore Ruby on Rails that word happens more than elated
pattern again great now we have the edges the top back only GP expressive deliver the package have responded well it's not that easy how HTTP packages can be delivered by the U. D. P expressed we have to use the TCP tourmaline instead before we can do that we need to make sure that from the kingdom is ready for delivery to we need to head back to KPS a sketch of the delivery so let's go pattern Pam returned to the KPS warehouse to prepare for the actual delivery pen explain the final steps and
started as I mentioned we have to deliver http packages by the TCP tourmaline because they require TCP assurance TCP assurance guarantees of the packet will be delivered untampered in its entirety carriers and recipients accomplish this by acknowledging each other's messages after we deliver http package In addition to the
reply message the recipient will also send back an acknowledgment to let us know that they received the package sometimes the combined the response an acknowledgment to save on postage if we don't receive an acknowledgment within a certain amount of time then we assume that the data received the package so we'll try delivering again will always make sure that the package alternately arrives at its destination however because
http packages are so popular because there are many other parcel carriers and careers the TCP tourmaline can suffer overload or congestion therefore after the great tourmaline collapse in 1986 the congestion control administration were CCA formed a regulator belying usage CCA has strict guidelines to ensure that the tourmaline does it becomes so overwhelmed that no package can be delivered and when a
carrier he's delivering new package they have to schedule the delivery with the recipient we call this a connection to avoid congestion of the tourmaline CCA dictates a sliding window of the number of packages that may flow between the carrier and the recipient for a given connection the sliding window just means that the carrier may only deliver a small number of packages at 1 time as long as the packages are acknowledged than the window can slide over so to speak and permit the carrier to deliver 1 more package them before if the carrier does not receive Acknowledgements in a timely manner then they must back off in typically have the number of packages they may send that wants basically lack of acknowledgment indicates that the tourmaline is reaching congestion levels so the carrier must reduce its window to help relieve the congestion I see that sounds like extra work an extra latency but it makes sense to ensure that the packages delivered and there's a fair use of the term among all carriers right now let's get our connection set up so we can deliver the package will need the help of our coordinator Sam sink for that
pattern have walked over the same scenes office in the warehouse Pam greeted Samael handing in the address for the Puma kingdom LCM we have a package to deliver to the prune the kingdom as soon as possible you set up a connection for us please Sam replied hey Pam sure thing let me give them a ring Sam call them from the kingdom in milliseconds later voice responded back below hello this is sam syncopate yes I would like to schedule a delivery we're ready to synchronize the connection with you 1 moment please OK we acknowledge a delivery of
requests and are ready to synchronize as well however are receiving department is a little backed up at the moment to prevent any issues with this delivery we need you to keep your window size to 1 package please Roger that we acknowledge you in window size request will have the delivery over there shortly Sam hung up the phone and relay the information from the Caltech pattern him Pam wasn't surprised I figured they might
limit the flow of packages the Puma kingdom is very popular well this does change things slightly what you mean question that remember that this package was a tune package on fire chrome industries requested to resources in addition to requesting the root resource slash they also and slashed the bike on that type of the notorious for doing this since you and I are using the same connection will need a track individual packages with sequence of words this allows them to making and to acknowledge them by number InputSplit up packed is back together if they come out of order your sequence order is 1 minus 2 therefore because they're limiting us to a window size of 1 initially you'll have to deliver your package alone before I can deliver my cat's eyes widened Oh no but how will I get there without your help I never use the TCP tourmaline before don't worry it's not as bad as it seems the tourmaline consists of multiple stops at router stations as long as you have an address should be fine each router station has routing table displays that inform carriers which trained on board for a given address aha ok this sounds simple I think I'm all set the perfect let's get you on the term aligned in pattern gamma storage of the
tourmaline boarding station ham-handed had a copy of the address a sequence number and is individual package here is everything you need we're running out of time so please hurry we don't want fired from ministries satisfy our so with our service pattern on the look at determination all do my best thank you for all your help him at boarded the train away by the him as patterns appeared over the horizon can something representative she realizes she forgot to tell patted the routing tables you cider Addis's not normal addresses
after several miliseconds Pat reached his 1st stop as he disembarked from the train he became quickly overwhelmed he could not believe the number of career scurrying from training to train the altered know exactly where to go and what to do he remembered pans advice so looked up to see a large screen with multiple addresses on it that was the the routing table he said to himself he
ran over to get a better look as he examined the table more closely he became confused the pool king and addresses isn't anywhere on the less all the addresses look different to they have slashes with more numbers in them at frantically looked back and forth from the table to the numerous traders in the hope that he would suddenly know what to do as he began to feel this
may be solved kiosk with the intended iterate over to the attended begged for assistance alone I knew that the tourmaline I haven't addressed but I have no idea how to interpret the roundtable above can you please assist me in the respondent and will of course I bet you've never seen cider addresses cider Anderson's just as I guess cider or classless intra-domain routing is just a fancy technique of describing multiple addresses let's see your edges Pat handed the attended the address in the 10 they continued off your addresses 192 . 38 at 252 . 153 that means you wanna go with that train over there which for destinations in 192 . 30 . 0 . 0 slash 16
see there is an extensive number of router stations and we can only store so many addresses in our routing tables and therefore it's simpler if we use the special cider address format to called multiple addresses as you know addresses afford numbers that range from 0 to 255 that range comes from 2 to the power of 8 which is 256 so we can use the slashes as a special way of describing a range for those were numbers altogether the
slashes called the mask which means that prevent certain numbers from changing the number after the slash mass numbers from left to right in the case of 192 . 30 . 0 . 0 slash 16 the number 16 masks the 192 in 30 we use the 1st 8 of 16 to mask the 192 and the remaining 8 2 mosques 30 that means this address encompasses all addresses from 192 . 13 . 0 . 0 to 192 . 13 . 255 . 255 we call the mass portion of the number of the network address it describes a network of Addis's like arrange the remaining numbers that can actually range in size comprised host addresses the way
cider and routing tables ultimately work is you always wonderful all the most specific address range possible this using means you want the range that contains your address and that has the largest mass when you come to your next stop each find difference cider edges with a larger mass it will encompass a smaller range of Alice's so that's why we see it gets more specific a believe your next stop has a path for 192 . 30 . 252 0 slash 24 see how that 20 formal mass 190 230 and 252 that leaves a smaller range of addresses eventually you arrive at the last station that should it should directly to your final destination wow thanks that explains a lot I think I have what I need them thank you again no problem in good luck with a feeling of relief
Pat ran over to the next train and boarded the train then dashed off to the next router station academic cut became accustomed to the flow of the router stations and made more hops from train the train with greater ease at was sure he would arrive from the kingdom very soon it was his last stops at confidently sauntered over to the next train on define attendant blocking the door that approach the attended excuse
me I need to be on train for my next destination the entries for the intended replied sorry sir which strain is reached its max passenger capacity due to CCA regulations I cannot allow you toward but according to the round-table this is the train I need without the strain I cannot deliver this package I understand what regulations are regulations you're welcome away at the station for short time another on this rope may make it another 2 to 3 seconds and longer than that on I'll have to ask you to return back to your carrier 0 no 2 to 3 seconds is too long why would I need to go back laughter station
themselves to only holds so many careers CCA guidelines dictate that to avoid congestion at stations attendance was asked careers
after a short while to leave and try the delivery later this is an extremely important package will surely there something you can do is there another rout by chance act quickly handed the attended the
address the 10 and examine the Addison thought for a moment will typically we prefer carriers take the shortest route to the destination but there are exceptions it's a little longer around you can take this train and follow the routing tables normal from the next station really that
works for me thank you have 1st off to the train as he approached the boarding platform solid doors begin the close the Dover those might made in the training just as the door shut in bringing this I believe and prepare for the final leg of his journey have finally arrived
at the Puma kingdom and cannot contain his excitement after walking through processing he stepped outside and was astounded at the shear height of Ruby Rails office building which is like a monolithic structure he ran into the building with the grinning ear to ear into the elevator to the top floor Pat exited the
elevator creating Ruby rose receptionists alone I haven't important package for Ruby Rails 1 moment please respond the receptionist perceptions picked up the phone and said Ruby there's a career with a package for you a moment later the receptionist invited path through the door she was see now thanks Pat itself in OpenOffice
store as the Energy Star Ruby Rails before him reaching out the package greeted her and are really well this honor to meet you in person my name is pat packet i have a package for you from fire industries while low and it's a pleasure to meet you as well applied be that looks like an important package ruby red to
the HTTP message I see something in the room the source we can definitely help with that also in the package to my age CEO excuse me what is a each
CEO 0 sorry base you my home controller officer he handles requests for the root resources be answered the package into a tube on the wall and 1st about the package was the way in a few milliseconds later a new package you down the tube Ruby handed it to Pat here you go a fresh HTTP response for fire from industries wow that was fast liver is a set of great pack thank you so much for your delivery I wish you well on your journey back we receive many packages for fire from industry so I'm sure we will see each other again thank you again Ruby Rails I look forward to it Pat Metheny reels office stopping to let the receptionist stamp acknowledgment symbol on the response package Pat
returned to the processing station with a smile on his face not only had he met Ruby Rails but you gain a wealth of knowledge about when delivery he felt confident of his newfound knowledge and new he had a bright future as a when career so that
concludes our story and just to circle back up and recap what have we covered through this story it's the idea that as web developers and Rails developers need to consider what all it takes just to get a request to our servers well that's important information considered we saw how we need DNS to figure out what is this domain name . 2 and that it had to go through several other servers just to get an answer and then we had use TCP to set up this connection we had requests replies Acknowledgements just to ensure that the package did get where needed to go that finally we utilize routing which took our addresses in smaller ranges to take it from 1 routed to the next to it finally got to our destination so why is this important if should call through the story I mentioned things like several miliseconds several milliseconds and that this all adds up we have that idea of latency this physical distance there was nothing we can do about that from any browser to a server so this all adds up and so as web developers of about this we need to consider this because performance is
definitely important so I say there to encourage you as he died wonder whether Goldman wander rails development to start thinking about these things and looking into the more things like caching where that's DNS queries or HTML in images and scripts and that's why we use things you might have heard of like content distribution networks which help reduce that distance from say a browser to the continent actually needs and edges all helps performance in the long run so finally I
just 1 again give a huge acknowledgment to Marissa Roper she's designed all the illustrations use author this talk she is an amazing designer and I encourage you to go check the website out checker work our and again thank you so much for us and with all of
that thank you all so much for joining me this morning referred to are and I
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Viereck
Datennetz
Betragsfläche
Adressraum
Güte der Anpassung
Ruhmasse
Zahlenbereich
Computeranimation
Verdeckungsrechnung
Spannweite <Stochastik>
Spannweite <Stochastik>
Adressraum
Arbeitsplatzcomputer
Tabelle <Informatik>
Wellenpaket
Freier Ladungsträger
Extrempunkt
Benutzerfreundlichkeit
Zwei
Arbeitsplatzcomputer
Kanalkapazität
Router
Datenfluss
Schnitt <Graphentheorie>
Regulator <Mathematik>
Computeranimation
Router
Pufferspeicher
Freier Ladungsträger
Momentenproblem
Adressraum
Arbeitsplatzcomputer
Ausnahmebehandlung
Routing
Normalvektor
Bitrate
Computeranimation
Überlastkontrolle
Stereometrie
Prozess <Physik>
Wellenpaket
Scherbeanspruchung
Gebäude <Mathematik>
Abgeschlossene Menge
Datenstruktur
Systemplattform
Computeranimation
Office-Paket
Momentenproblem
Speicher <Informatik>
Computeranimation
Menge
Endogene Variable
Gamecontroller
Symboltabelle
Wurzel <Mathematik>
Quellcode
Message-Passing
Computeranimation
Office-Paket
Einfach zusammenhängender Raum
Kreisfläche
Prozess <Physik>
Browser
Adressraum
Computeranimation
Domain-Name
Spannweite <Stochastik>
Direkte numerische Simulation
Arbeitsplatzcomputer
Ablöseblase
Server
Web-Designer
Routing
Abstand
Information
Softwareentwickler
CDN-Netzwerk
Autorisierung
Distributionstheorie
Retrievalsprache
Web Site
Browser
Content <Internet>
Abfrage
Computeranimation
Spezialrechner
Datennetz
Direkte numerische Simulation
Skript <Programm>
Skript <Programm>
Abstand
Direkte numerische Simulation
Softwareentwickler
Bildgebendes Verfahren
Rechenschieber
Computeranimation

Metadaten

Formale Metadaten

Titel Pat Packet Visits Ruby Rails
Serientitel RailsConf 2016
Teil 85
Anzahl der Teile 89
Autor Fairbank, Jeremy
Lizenz CC-Namensnennung - Weitergabe unter gleichen Bedingungen 3.0 Unported:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen und nicht-kommerziellen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen und das Werk bzw. diesen Inhalt auch in veränderter Form nur unter den Bedingungen dieser Lizenz weitergeben.
DOI 10.5446/31541
Herausgeber Confreaks, LLC
Erscheinungsjahr 2016
Sprache Englisch

Inhaltliche Metadaten

Fachgebiet Informatik
Abstract The eager Pat Packet just started his first job at KPS (Kernel Parcel Service). He knows an important package is coming through from Firechrome Industries destined for the Puma Kingdom for Ruby Rails herself! Pat’s boss acquiesces to Pat’s pleas to deliver the package. Come follow Pat’s journey as he delivers this very important package to Ruby Rails! Whether we realize it or not, a lot of magic goes behind the scenes to deliver an HTTP request from a browser to a Rails server. In this talk, learn about TCP/IP, DNS, HTTP, routers, and much more as they help Pat Packet deliver his package.

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