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

by donnemartin Python Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets(3)Community Discussions(1)Vulnerabilities Install Support

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.

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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.

Quality

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

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.

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.

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

Python

Lines of Code : 23

License : Non-SPDX (NOASSERTION)

Copy

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex

The System Design Primer,Appendix,Latency numbers every programmer should know

Python

Lines of Code : 23

License : Non-SPDX (NOASSERTION)

Copy

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex

The System Design Primer,Appendix,Powers of two table

Python

Lines of Code : 10

License : Non-SPDX (NOASSERTION)

Copy

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

QUESTION

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?

...

ANSWER

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.

Source https://stackoverflow.com/questions/60479306

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

Vulnerabilities

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.