gossip-glomers
litestream
gossip-glomers | litestream | |
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12 | 165 | |
85 | 10,042 | |
- | - | |
4.5 | 7.5 | |
about 1 year ago | 23 days ago | |
Go | Go | |
- | Apache License 2.0 |
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gossip-glomers
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Learning about distributed systems: where to start?
There's a nice-looking series of exercises from fly.io: https://fly.io/dist-sys/
(I haven't actually done them myself yet, but they look great. Not a standalone resource, but good for practice)
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Maelstrom: A workbench for learning distributed systems
Really worth noting that Maelstrom was the project they used to build the "Fly.io Distributed Systems Challenge" https://fly.io/dist-sys/ which was pretty popular at one point and discussed here, too. https://news.ycombinator.com/item?id=34897723
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Skip the API, Ship Your Database
LiteFS works similarly to async replication you'd find in Postgres or MySQL so it doesn't try to be as strict as something running a distributed consensus protocol like Raft. The guarantees for async replication are fairly loose so I'm not sure Jepsen testing would be useful for that per se.
On the LiteFS Cloud side, it currently does streaming backups so it has similar guarantees but we are expanding its feature set and I could see running Jepsen testing on that in the future. We worked with Kyle Kingsbury in the past on some distributed systems challenges[1] and he was awesome to work with. Would definitely love to engage with him again.
[1]: https://fly.io/dist-sys/
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Fly.io Postgres cluster went down for 3 days, no word from them about it
They have really good tech blog posts. Also, they have https://fly.io/dist-sys/
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Ask HN: Leetcode for Back End and Server Development
- https://hackattic.com/ : Interesting programming Problems.
- https://sadservers.com/ : Learn Linux by solving problems.
- https://fly.io/dist-sys/ : Distributed Systems Problems.
- https://github.com/pingcap/talent-plan/ : System Programming / Distributed System Challenge.
- https://protohackers.com/ : Server Programming Challenges.
- https://codecrafters.io/ : Implement server tech / softwares from scratch.
- https://hyperskill.org/ : Lots of projects based tutorials.
- https://fly.io/dist-sys/ : Distributed Systems Problems.
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zio-maelstrom
Gossip Glomers https://fly.io/dist-sys/ by fly.io is a great way to learn distributed systems. They are fun to solve challenges. zio-maelstrom helps you get started faster in Scala!
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Where can I learn in depth about distributed systems and distributed computing from a traditional computer science perspective?
There’s also this to practice https://fly.io/dist-sys/
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Am I screwed if I'm finding it really difficult to enjoy using HTML/CSS and JS?
Yeah no the embedded stuff is more a hobby, I'm interested professionally in stuff like what you said you're doing now in another comment, distributed systems and such. Infrastructure for cloud providers, that kind of thing. Right now I'm doing this distributed systems challenge series thing https://fly.io/dist-sys/ which should be cool to put on my github.
- Ask HN: Projects to do to get better at distributed systems
litestream
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Ask HN: SQLite in Production?
I have not, but I keep meaning to collate everything I've learned into a set of useful defaults just to remind myself what settings I should be enabling and why.
Regarding Litestream, I learned pretty much all I know from their documentation: https://litestream.io/
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How (and why) to run SQLite in production
This presentation is focused on the use-case of vertically scaling a single server and driving everything through that app server, which is running SQLite embedded within your application process.
This is the sweet-spot for SQLite applications, but there have been explorations and advances to running SQLite across a network of app servers. LiteFS (https://fly.io/docs/litefs/), the sibling to Litestream for backups (https://litestream.io), is aimed at precisely this use-case. Similarly, Turso (https://turso.tech) is a new-ish managed database company for running SQLite in a more traditional client-server distribution.
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SQLite3 Replication: A Wizard's Guide🧙🏽
This post intends to help you setup replication for SQLite using Litestream.
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Ask HN: Time travel" into a SQLite database using the WAL files?
I've been messing around with litestream. It is so cool. And, I either found a bug in the -timestamp switch or don't understand it correctly.
What I want to do is time travel into my sqlite database. I'm trying to do some forensics on why my web service returned the wrong data during a production event. Unfortunately, after the event, someone deleted records from the database and I'm unsure what the data looked like and am having trouble recreating the production issue.
Litestream has this great switch: -timestamp. If you use it (AFAICT) you can time travel into your database and go back to the database state at that moment. However, it does not seem to work as I expect it to:
https://github.com/benbjohnson/litestream/issues/564
I have the entirety of the sqlite database from the production event as well. Is there a way I could cycle through the WAL files and restore the database to the point in time before the records I need were deleted?
Will someone take sqlite and compile it into the browser using WASM so I can drag a sqlite database and WAL files into it and then using a timeline slider see all the states of the database over time? :)
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Ask HN: Are you using SQLite and Litestream in production?
We're using SQLite in production very heavily with millions of databases and fairly high operations throughput.
But we did run into some scariness around trying to use Litestream that put me off it for the time being. Litestream is really cool but it is also very much a cool hack and the risk of database corruption issues feels very real.
The scariness I ran into was related to this issue https://github.com/benbjohnson/litestream/issues/510
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Pocketbase: Open-source back end in 1 file
Litestream is a library that allows you to easily create backups. You can probably just do analytic queries on the backup data and reduce load on your server.
https://litestream.io/
- Litestream – Disaster recovery and continuous replication for SQLite
- Litestream: Replicated SQLite with no main and little cost
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Why you should probably be using SQLite
One possible strategy is to have one directory/file per customer which is one SQLite file. But then as the user logs in, you have to look up first what database they should be connected to.
OR somehow derive it from the user ID/username. Keeping all the customer databases in a single directory/disk and then constantly "lite streaming" to S3.
Because each user is isolated, they'll be writing to their own database. But migrations would be a pain. They will have to be rolled out to each database separately.
One upside is, you can give users the ability to take their data with them, any time. It is just a single file.
[0]. https://litestream.io/
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Monitor your Websites and Apps using Uptime Kuma
Upstream Kuma uses a local SQLite database to store account data, configuration for services to monitor, notification settings, and more. To make sure that our data is available across redeploys, we will bundle Uptime Kuma with Litestream, a project that implements streaming replication for SQLite databases to a remote object storage provider. Effectively, this allows us to treat the local SQLite database as if it were securely stored in a remote database.
What are some alternatives?
transcripts - Changelog episode transcripts in Markdown format 📚
rqlite - The lightweight, distributed relational database built on SQLite.
litevfs - LiteFS VFS SQLite extension for serverless environments
pocketbase - Open Source realtime backend in 1 file
maelstrom - A workbench for writing toy implementations of distributed systems.
realtime - Broadcast, Presence, and Postgres Changes via WebSockets
talent-plan - open source training courses about distributed database and distributed systems
k8s-mediaserver-operator - Repository for k8s Mediaserver Operator project
Phoenix - Peace of mind from prototype to production
sqlcipher - SQLCipher is a standalone fork of SQLite that adds 256 bit AES encryption of database files and other security features.
flyctl - Command line tools for fly.io services