litestack VS litestream

The benchmarks for LiteCache are impressive, with a small caveat. While LiteCache outperforms a local Redis installation for every read operation, it seems like there's still room for improvement, especially for large write payloads.

Luckily, the official LiteStack benchmarks include measurements for LiteCable against Redis, which I am going to quote here.

Let's quickly look into how LiteJob uses SQLite to implement a job queueing system. In essence, the class Litequeue interfaces with the SQLite queue table. This table's columns, like id, name, fire_at, value, and created_at, store and manage job details.

Next, we install LiteStack using the shipped generator:

Related: I wrote a piece last week on deploying Rails apps to production on Fly.io at https://fly.io/ruby-dispatch/sqlite-and-rails-in-production/

The work that’s made this possible is:

1. Litestack - https://github.com/oldmoe/litestack

2. Fly.io’s work on the dockerfile-rails generator detecting Sqlite and Litestack in a Rails project, then setting up sane defaults for where that data is stored and persisted in production. This is all done behind the scenes with no intervention required from the person deploying.

3. Servers are overall faster and more powerful

I hope more Rails hosts make it easier and safer to deploy Sqlite to production. It will lower costs and reduce complexity for folks deploying apps.

Didn't know that one! The litestack.gemspec shows it's a wrapper around the sqlite3 gem. So, not really comparable...

I’m working on this for Rails apps at https://github.com/oldmoe/litestack/pull/12

The idea is that people with small-to-medium size Rails Turbo apps should be able to deploy them without needing Redis or Postgres.

I’ve gotten as far as deploying this stack _without_ LiteFS and it works great. The only downside is the application queues requests on deploy, but for some smaller apps it’s acceptable to have the client wait for a few seconds while the app restarts.

When I get that PR merged I’ll write about how it works on Fly and publish it to https://fly.io/ruby-dispatch/.

Rails is the way to go. The productivity of the Ruby language is insane. It's battle tested for decades and you can easily scale your prototype.

If you want a simple app served on a single host you can try LiteStack [0] so you don't need a Redis/Postgres/Sidekiq instance, just SQLite.

Laravel is also good if you like PHP language.

[0] https://github.com/oldmoe/litestack

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/

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.

This post intends to help you setup replication for SQLite using Litestream.

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? :)

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

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/

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/

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.