More V less D
this post was submitted on 29 Sep 2024
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Someone a short ELI ? I read the article and the comments... But I have no idea what this is about.
Maybe someone has an article that explains for someone not being educated as computer scientist ?
D-Bus is a system service that is used by processes to communicate with others. It's commonly used, but as users we rarely see anything of it. It's usage for programmers and sysadmins is/can be quite complicated. It looks they want to add a new simpler one. Haven't heard of varlink before, though
DBus is a system-wide messaging system. It's for stuff like notifications and system-wide events, ...or so do I think. But the aim is to allow all programs, running system-wide, to announce anything for others programs to react to.
This post requests people to use Varlink instead.
This is similar to the PulseAudio versus Pipewire and X11 versus Wayland situations.
how is varlink better than dbus to justify that change?
The main reason is that Dbus is not available during early stages of boot. There are many others.
Varlink seems to be better or the same compared to dbus in all except two things:
- json doesn't handle 64bit integers, it handles 52bit (or 54bit?) (size of mantissa for floats)
- you cannot (yet) list all things connected to the bus
Details here:
Thank you :)) ! I have the same question as @umbrella if your have any other insights to share !
how is varlink better than dbus to justify that change?
The only argument I see in favour of varlink is the ease of debugging, and this should never being an argument in a technical decision.
When your stuff is running in "prod", your " ease of debugging" is thrown away, but the system continue to suffer.
Json for IPC is a terrible idea.