volspotconnect2 and caching

[fuerst]

What is the reason for disabling caching in /data/plugins/music_service/volspotconnect2/volspotify.toml? Is it because the cache size can not be limited?

I activated it anyway and caching seems to work. The files directory get's filled up with files as I play Spotify songs. Probably the cache needs to be moved to it's own size limited partition or volume so it will not fill up the whole SD card.

[ashthespy]

Well, this is multifold: -- There is indeed currently no measures in place to limit the size of the cache. -- If cache is set to /tmp, then its on RAM, so a large cache would impact system performance at some point. -- Directly writing onto the SD card is kept to a minimum to prevent SD card wear.

[balbuze]

In earlier version of the plugin, I had a cache handling with auto flush when a define size was reached. Maybe we can pull it from dust? edit : https://github.com/balbuze/volumio-plugins/commit/b0a2bbd319c2632f087d9bd550fcd719ebaf3ca0#diff-5b9ed537612f83c3979f9b29076b6720

[fuerst]

Thanks for your answers!

I think with durable SD cards like Samsung PRO Endurance available it would be okay to write directly to the SD card. Also using a big SD card rather than a small one would help because data will be written less often to the same cell.

So if you agree I think we need:

1. Additional options in the UI which allows

• activating caching
• set the filesystem path for cache files with a default in the volumio user's home directory
• set the cache size

2. Use the script from b0a2bbd319c2632f087d9bd550fcd719ebaf3ca0 to monitor the cache size and remove oldest files if needed.

How does the the cleanup script get triggered - by using cron?

[balbuze]

It uses a system d timer as far I remember