system-design-primer | design large-scale systems | Architecture library

 by   donnemartin Python Version: Current License: Non-SPDX

kandi X-RAY | system-design-primer Summary

kandi X-RAY | system-design-primer Summary

system-design-primer is a Python library typically used in Institutions, Learning, Education, Architecture applications. system-design-primer has no bugs, it has no vulnerabilities and it has medium support. However system-design-primer build file is not available and it has a Non-SPDX License. You can download it from GitHub.

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

            kandi-support Support

              system-design-primer has a medium active ecosystem.
              It has 222195 star(s) with 39357 fork(s). There are 6485 watchers for this library.
              It had no major release in the last 6 months.
              There are 181 open issues and 75 have been closed. On average issues are closed in 119 days. There are 200 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of system-design-primer is current.

            kandi-Quality Quality

              system-design-primer has 0 bugs and 28 code smells.

            kandi-Security Security

              system-design-primer has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              system-design-primer code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              system-design-primer has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              system-design-primer releases are not available. You will need to build from source code and install.
              system-design-primer has no build file. You will be need to create the build yourself to build the component from source.
              Installation instructions are not available. Examples and code snippets are available.
              system-design-primer saves you 270 person hours of effort in developing the same functionality from scratch.
              It has 655 lines of code, 148 functions and 26 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed system-design-primer and discovered the below as its top functions. This is intended to give you an instant insight into system-design-primer implemented functionality, and help decide if they suit your requirements.
            • Dispatch a call
            • Dispatches the given call
            • Set a call to the employee
            • Adds the results to the cache
            • Get a node matching the query
            • Process a query
            • Parse a query
            • Crawl all pages
            • Crawl a page
            • Disks a vehicle
            • Return the value associated with the given key
            • Removes a key from the table
            • Return the card value
            • Calculate the score of this node
            • Add a key to the table
            • Reduce budget notifications
            • Generator for mapper
            • Mapper a line of time series
            • Given a line return the product product category
            • Remove the vehicle from the spot
            Get all kandi verified functions for this library.

            system-design-primer Key Features

            No Key Features are available at this moment for system-design-primer.

            system-design-primer Examples and Code Snippets

            The System Design Primer,Appendix,Latency numbers every programmer should know
            Pythondot img1Lines of Code : 23dot img1License : Non-SPDX (NOASSERTION)
            copy iconCopy
            Latency Comparison Numbers
            L1 cache reference                           0.5 ns
            Branch mispredict                            5   ns
            L2 cache reference                           7   ns                      14x L1 cache
            The System Design Primer,Appendix,Latency numbers every programmer should know
            Pythondot img2Lines of Code : 23dot img2License : Non-SPDX (NOASSERTION)
            copy iconCopy
            Latency Comparison Numbers
            L1 cache reference                           0.5 ns
            Branch mispredict                            5   ns
            L2 cache reference                           7   ns                      14x L1 cache
            The System Design Primer,Appendix,Powers of two table
            Pythondot img3Lines of Code : 10dot img3License : Non-SPDX (NOASSERTION)
            copy iconCopy
            Power           Exact Value         Approx Value        Bytes
            7                             128
            8                             256
            10                           1024   1 thousand            

            Community Discussions

            Trending Discussions on system-design-primer


            crawler design - calling an async job vs. calling a service
            Asked 2020-Apr-10 at 10:56

            I'm looking at donne martin's design for a web crawler. the crawler service processes a newly crawled url, and then:

            • Adds a job to the Reverse Index Service queue to generate a reverse index
            • Adds a job to the Document Service queue to generate a static title and snippet

            what would happen if instead the crawler service would synchronously call these 2 services? I would still be able to horizontally scale all 3 services according to the load on each, right? what came to me as a possible reason is just more complex flow control if one of them fails. are there other more compelling reasons for these async jobs?



            Answered 2020-Apr-10 at 03:01

            There are likely more reasons behind this design choice, but one is almost certainly use of Microservices. It is a popular technique, so demonstrating command of it is a good idea for answering design questions and benefits of it are well described on Wikipedia:

            • Modularity: This makes the application easier to understand, develop, test, and become more resilient to architecture erosion.[6] This benefit is often argued in comparison to the complexity of monolithic architectures.[33]
            • Scalability: Since microservices are implemented and deployed independently of each other, i.e. they run within independent processes, they can be monitored and scaled independently.[34]
            • Integration of heterogeneous and legacy systems: microservices is considered as a viable mean for modernizing existing monolithic software application.[35][36] There are experience reports of several companies who have successfully replaced (parts of) their existing software by microservices, or are in the process of doing so.[37] The process for Software modernization of legacy applications is done using an incremental approach.[38]
            • Distributed development: it parallelizes development by enabling small autonomous teams to develop, deploy and scale their respective services independently.[39] It also allows the architecture of an individual service to emerge through continuous refactoring.[40] Microservice-based architectures facilitate continuous integration, continuous delivery and deployment.[41] [42]

            All of those apply in this case. Indeed, well-defined API makes the modules separate, reusable, easy to understand. Most likely each of the 3 modules will have very different execution time and CPU/memory requirements, so scaling them separately makes a lot of sense. Some companies like Amazon mentioned on the page might go much further splitting those modules into microservices based on the team number, so this split into 3 services can very well be chosen based on the assumption of having 3 teams, rather than technical constraints.

            The page also describes criticism of the technique.


            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install system-design-primer

            You can download it from GitHub.
            You can use system-design-primer like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.


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