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by johnchristopher 4024 days ago
> fast, in-memory database

> The Raspberry Pi that I used for developing and running the server is a fantastic little machine, and its specs encouraged the compact, memory-efficent design.

> I set up a quick JavaScript example that reads and writes values from the database running on my home server, at http://enno.kn-bremen.de/keyval.html.*

Really cool. Is the home server an actual raspberry ?
2 comments
enno 4024 days ago
It's a Raspberry 1 Model B, the 512 MB version. So with any luck, I will see how this code performs once it runs out of memory? https://imgur.com/gallery/XI3Rul6

I've got a RPi 2B sitting here that I want to fail over to sometime this weekend, which gives me an opportunity to think about that process, and how EnnoDB could make it easier. My current thinking is: switch to read-only mode, rsync the database to the new host, spin up another process there, then flip the IP address on the router. Probably going to need an admin interface for that. Fun!

This reminds me, I should probably write the database log to the SSD, not the SD card. The new Pi's root filesystem only has 2GB, I was running out of media.

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aaggarwal 4023 days ago
Oh cool, an in-memory lightweight NOSQL database. In the context of pervasive computing I can see its multiple use cases. A embedded device with limited computing capabilites would be able to store, process and act on sensor data in near real-time.

Can this database be also embedded in applications?

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enno 4023 days ago
The source code is there for anyone to do whatever they like with it. Of course you could use this in-process and strip away the server logic, it's even split into source files to make that easy (nosql.[hc] are the files that implement the key-value store, everything else handles the fcgi requests).
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