|7 days ago||7 days ago|
|Apache License 2.0||Apache License 2.0|
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
I created an in-memory SQL database called MemSQL as a learning project
3 projects | /r/golang | 30 Mar 2023
Might be interested in https://github.com/dolthub/go-mysql-server, which also does this
Implementing the MySQL server protocol for fun and profit
2 projects | news.ycombinator.com | 22 Dec 2022
One item under "Scope of this project":
Provide a runnable server speaking the MySQL wire protocol, connected to data sources of your choice.
MySQL-mimic - Python implementation of the MySQL server wire protocol.
4 projects | /r/Python | 31 Oct 2022
7 projects | news.ycombinator.com | 22 Aug 2022
Litetree – SQLite with Branches
3 projects | news.ycombinator.com | 22 Jul 2022
I just wanted to say thanks for https://github.com/dolthub/go-mysql-server
This is incredibly useful for anyone who wants to build their own DB or wrap another datasource so it's queryable via MySQL protocol.
Dolt Is Git for Data
5 projects | news.ycombinator.com | 23 Jun 2022
a very cool project they also maintain is a MySQL server framework for arbitrary backends (in Go): https://github.com/dolthub/go-mysql-server
You can define a "virtual" table (schema, how to retrieve rows/columns) and then a MySQL client can connect and execute arbitrary queries on your table (which could just be an API or other source)5 projects | news.ycombinator.com | 23 Jun 2022
The world of PostgreSQL wire compatibility
3 projects | news.ycombinator.com | 10 Feb 2022
Thanks for this write up! I've been really interested in postgres compatibility in the context of a tool I maintain (https://github.com/mergestat/mergestat) that uses SQLite. I've been looking for a way to expose the SQLite capabilities over a more commonly used wire-protocol like postgres (or mysql) so that existing BI and visualization tools can access the data.
This project is an interesting one: https://github.com/dolthub/go-mysql-server that provides a MySQL interface (wire and SQL) to arbitrary "backends" implemented in go.
It's really interesting how compatibility with existing protocols has become an important feature of new databases - there's so much existing tooling that already speaks postgres (or mysql), being able to leverage that is a huge advantage IMO
calling Format() on a time struct in a golang program changes the default Location's timezone information in the rest of the program
4 projects | /r/programming | 3 Sep 2021
Let's write a compiler, part 5: A code generator
14 projects | news.ycombinator.com | 19 Aug 2021
2 projects | news.ycombinator.com | 7 Nov 2023
Why would it be a Google project? https://github.com/vitessio/vitess
PlanetScale Scaler Pro
3 projects | news.ycombinator.com | 6 Jul 2023
This is great news. I strolled around https://github.com/vitessio/vitess/issues/12967.
Are there any public discussions of more trade-offs vitess has to make to enable fks?
Scaling Databases at Activision [pdf]
3 projects | news.ycombinator.com | 21 Apr 20233 projects | news.ycombinator.com | 21 Apr 2023
Want to avoid MySQL but find PlanetScale really appealing
4 projects | /r/PostgreSQL | 25 Mar 2023
A lot of this is possible thanks to the magic of Vitess.
YouTube System Design
2 projects | /r/softwarearchitecture | 5 Feb 2023
### YouTube The popular implementations of an on-demand video streaming service are the following: - YouTube - Netflix - Vimeo - TikTok --- #### Requirements - The user (**client**) can upload video files - The user can stream video content - The user can search for videos based on the video title --- #### Data storage ##### Database schema - The primary entities are the videos, the users, and the comments tables - The relationship between the users and the videos is 1-to-many - The relationship between the users and the comments table is 1-to-many - The relationship between the videos and the comments table is 1-to-many --- ##### Type of data store - The wide-column data store ([LSM](https://en.wikipedia.org/wiki/Log-structured\_merge-tree) tree-based) such as [Apache HBase](https://hbase.apache.org/) is used to persist thumbnail images for clumping the files together, fault-tolerance, and replication - A cache server such as Redis is used to store the metadata of popular video content - Message queue such as Apache Kafka is used for the asynchronous processing (encoding) of videos - A relational database such as MySQL stores the metadata of the users and the videos - The video files are stored in a managed object storage such as AWS S3 - Lucene-based inverted-index data store such as Apache Solr is used to persist the video index data to provide search functionality --- #### High-level design - Popular video content is streamed from CDN - Video encoding (**transcoding**) is the process of converting a video format to other formats (MPEG, HLS) to provide the best stream possible on multiple devices and bandwidth - A message queue can be configured between services for parallelism and improved fault tolerance Codecs (H.264, VP9, HEVC) are compression and decompression algorithms used to reduce video file size while preserving video quality - The popular video streaming protocols (data transfer standard) are **MPEG-DASH** (Moving Pictures Experts Group - Dynamic Adaptive Streaming over HTTP), **Apple HLS** (HTTP Live Streaming), **Microsoft Smooth Streaming**, and **Adobe HDS** (HTTP Dynamic Streaming) --- #### Video upload workflow 1. The user (**client**) executes a DNS query to identify the server 2. The client makes an HTTP connection to the load balancer 3. The video upload requests are rate limited to prevent malicious clients 4. The load balancer delegates the client's request to an API server (**web server**) with free capacity 5. The web server delegates the client's request to an app server that handles the API endpoint 6. The ID of the uploaded video is stored on the message queue for asynchronous processing of the video file 7. The title and description (**metadata**) of the video are stored in the metadata database 8. The app server queries the object store service to generate a pre-signed URL for storing the raw video file 9. The client uploads the raw video file directly to the object store using the pre-signed URL to save the system network bandwidth 10. The transcoding servers query the message queue using the publish-subscribe pattern to get notified on uploaded videos 11. The transcoding server fetches the raw video file by querying the raw object store 12. The transcoding server transcodes the raw video file into multiple codecs and stores the transcoded content on the transcoded object store 13. The thumbnail server generates on average five thumbnail images for each video file and stores the generated images on the thumbnail store 14. The transcoding server persists the ID of the transcoded video on the message queue for further processing 15. The upload handler service queries the message queue through the publish-subscribe pattern to get notified on transcoded video files 16. The upload handler service updates the metadata database with metadata of transcoded video files 17. The upload handler service queries the notification service to notify the client of the video processing status 18. The database can be partitioned through [consistent hashing](https://systemdesign.one/consistent-hashing-explained/) (key = user ID or video ID) 19. [Block matching](https://en.wikipedia.org/wiki/Block-matching\_algorithm) or [Phase correlation](https://en.wikipedia.org/wiki/Phase\_correlation) algorithms can be used to detect the duplicate video content 20. The web server (API server) must be kept stateless for scaling out through replication 21. The video file is stored in multiple resolutions and formats in order to support multiple devices and bandwidth 22. The video can be split into smaller chunks by the client before upload to support the resume of broken uploads 23. Watermarking and encryption can be used to protect video content 24. The data centers are added to improve latency and data recovery at the expense of increased maintenance workflows 25. Dead letter queue can be used to improve fault tolerance and error handling 26. Chaos engineering is used to identify the failures on networks, servers, and applications 27. Load testing and chaos engineering are used to improve fault tolerance 28. [RAID](https://en.wikipedia.org/wiki/RAID) configuration improves the hardware throughput 29. The data store is partitioned to spread the writes and reads at the expense of difficult joins, transactions, and fat client 30. Federation and sharding are used to scale out the database 31. The write requests are redirected to the leader and the read requests are redirected to the followers of the database 32. [Vitess](https://vitess.io/) is a storage middleware for scaling out MySQL 33. Vitess redirects the read requests that require fresh data to the leader (For example, update user profile operation) 34. Vitess uses a lock server (Apache Zookeeper) for automatic sharding and leader election on the database layer 35. Vitess supports RPC-based joins, indexing, and transactions on SQL database 36. Vitess allows to offload of partitioning logic from the application and improves database queries by caching
Typesafe Database Queries on the Edge
9 projects | dev.to | 12 Nov 2022
PlanetScale is a serverless MySQL database provider which is based on Vitess. You get the scaling benefits of Vitess without the need to manage it yourself.
YouTube confirms that it has removed the “sort by oldest/newest” option
10 projects | news.ycombinator.com | 11 Nov 2022
Ask HN: Real-world anecdotes of MySQL at scale?
2 projects | news.ycombinator.com | 27 Sep 2022
Are you referring to distributed MySQL such as Vitess? It is the backend for Slack and GitHub; also was the backend for YouTube in the past.2 projects | news.ycombinator.com | 27 Sep 2022
There’s Vitess that’s been mentioned on HN a lot recently. https://vitess.io/
What are some alternatives?
tidb - TiDB is an open-source, cloud-native, distributed, MySQL-Compatible database for elastic scale and real-time analytics. Try AI-powered Chat2Query free at : https://tidbcloud.com/free-trial
supabase - The open source Firebase alternative.
cockroach - CockroachDB - the open source, cloud-native distributed SQL database.
citus - Distributed PostgreSQL as an extension
go-mysql-elasticsearch - Sync MySQL data into elasticsearch
vitess-sqlparser - simply SQL Parser for Go ( powered by vitess and TiDB )
kingshard - A high-performance MySQL proxy
Tile38 - Real-time Geospatial and Geofencing
migrate - Database migrations. CLI and Golang library.
buntdb - BuntDB is an embeddable, in-memory key/value database for Go with custom indexing and geospatial support
orchestrator - MySQL replication topology manager/visualizer
go-mysql - a powerful mysql toolset with Go