orignal

I see too different problems: 1. Excessive disk space usage 2. Excessive I/O operations While 1. could be implemented with any approach using a single big file instead bunch of...

Go ahead and implement these config params

if you wish try to implement a flat file (tar like) for entire storage. Meaning you store all files sequentially in one shot. But without additional dependencies, please.

у нас в i2p ирке куча народу с ygg сидит

Not for now. But I agree it's good idea to add this feature.

There is local.csv in ~/addressbook implementing similar thing

It's not implemented this way, but we can include local hostnames there.

But what might we need it for since there is no an official DNS in I2P?

насчет sqlite, не стоит порождать лишние зависимости без надобности

Мелкие файлы в основном в netdb, так сделано для совсемистимости с джавой