Directory structure for non-OTP projects
Thu Jul 28 15:16:06 CEST 2005
On 28 Jul 2005, at 12:08, Tim Bates wrote:
> I want to keep my system install of Erlang separate from my development
> environment, but maybe I'm approaching things the wrong way. Do people
> normally have a separate install of Erlang for each project, with only
> the modules they need?
Yes, that is usually how it is. Each erlang node we deploy has
everything it needs to run under one top level directory.
> Do people normally go through some variant of the
> release process described in the OTP Design Principles every time they
> change a line of code?
No - not really. This is what we do.
- If some modules are changed, we put them in the right paths and load
the new modules into the node.
- If we need to add new applications or the version number of an
application has changed (for e.g because of backward incompatible
changes or because we added new modules) we go through the release
process. But even in this case, we don't write .appup and .relup files.
We just build a new boot file, copy the boot file and the new stuff
into appropriate places and either wait for the next node restart or we
do a controlled restart. We maintain uptime by diverting traffic to
- If we have to upgrade the ERTS and/or some OTP libraries, we build a
whole new release and install it in place of the old one and restart
I know of quite a few people you do not use much of the OTP framework
and instead have their own way of starting up nodes. But that is only
really recommended once you have attained 'guru' status :-)
I hope this helps.
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