n levels? What are they usedfor? Database isolation allows a transaction to execute as if there are noother concurrently running transactions .The diagram below illustrates f show annotation
m Design Interview Volume 2, on how to implementa traditional wallet (https://amzn.to/34G2vmC).92. T show annotation
Implement a blockchain wallter, similar to bitcoin.
such asvalidation.Over to you: if Elon Musk set up a base on planet Mars, what paymentsolution will you recommend? 10What is SSO (Single Sign-On)?A show annotation
I would need to recommend a system that is always up as payment should be able to get processed at all time. There should be some offline credits stored at all time, like paytm has for toll. To find best solution I will need answer for:
Which is the best blockchain technology now?
How much time will it take to verify/ add a transaction?
How will the stored data affect future transactions?
or example, YouTube.Steps 9-10: YouTube finds the user is not logged in, and then requestsauthentication . The SSO authentication server show annotation
How do youtube know it is the same user, do the JWT token contain the user information, like email ID and the information is picked from there? Can JWT be modified about user information without breaking its integrity? Last time I read about it it wasn’t possible, is it possible now?
Found this link: https://stackoverflow.com/questions/53006349/can-you-modify-the-header-of-a-jwt-token-after-it-is-created-after-it-is-encryp
ournal. It’s the same if we use Event Sourcing architecture to builda traditional wallet, a show annotation
Event Sourcing is an architectural design pattern that stores data in an append-only log. It is part of a wider ecosystem of design patterns that work together in various ways to allow developers to create the most effective architecture for their needs.
OL(head-of-line) blocking issue. HOL blocking - when the number of allowed parallel requests in thebrowser is used up, subsequent requests need to wait for the formerones to complete .53🔹HTTP 2.0 was published in 2 show annotation
Now approximately 4 API calls can happen in parallel, limiting the number of calls is issue of browser or HTTP protocol?
e proposedsuccessor to HTTP 2.0. It uses QUIC instead of TCP for the underlyingtransport pro show annotation
QUIC is a general-purpose transport layer network protocol initially designed by Jim Roskind at Google, implemented, and deployed in 2012, announced publicly in 2013 as experimentation broadened, and described at an IETF meeting
doesn’t affect others.Question: When shall we upgrade to HTTP 3.0? Any pros & cons youcan think o f?—Check out our bestselling sys show annotation
HTTP/3 is even faster because it incorporates all of HTTP/2 and solves the TCP HOL blocking problem as well. HTTP/3 is still just a draft but is already being deployed. It is more efficient, uses fewer resources (system and network), requires encryption (SSL certificates are mandatory), and uses UDP.
e upload,we have to start over. A better solution is to slice a large object intosmaller parts and upload them independently . After all the parts areuploade show annotation
Is slicing of files done only to address the large object issue?
and upload them independently. After all the parts areuploaded, the object store re-assembles the object from the parts. Thisprocess is called 𝐦𝐮𝐥𝐭𝐢𝐩𝐚𝐫𝐭 𝐮𝐩𝐥𝐨𝐚𝐝 .The diagram below illustrates h show annotation
ta, file content, andoperations. One of the biggest challenges is real-time conflict resolution. Commonalgorithms include:🔹 Operational transformation (OT)🔹 Differential Synchronization (DS)🔹 Conflict-free replicated data type (CRD T)Google Doc uses OT according t show annotation
Algo for real-time conflict resolution