[systemd-devel] starting Oracle with systemd

[Andrei Borzenkov]

В Thu, 30 Oct 2014 20:06:55 +0100
Lennart Poettering <lennart at poettering.net> пишет:


> 
> I have no idea how Oracle works, and the above it too cryptic to fully
> understand what point you are trying to make. Can you eloborate on
> this for somebody who doesn't know a thing about Oracle? 

Oracle database server consists of two parts - set of backend processes
(database server) and network listener. Client connects to listener
which spawns process that performs database processing for this client.
Each client connection creates new process. Once client process is
started, listener no more is involved in further processing. This is
similar to socket activation used by systemd.

Listener can be configured to spawn client processes for multiple
databases. There is well known TCP port for client connection.

Conceptually listener is independent of database server. It is still
possible to connect locally when you are on the same host even if
listener is not running.

So the problem right now is, if listener is configured as separate
service all client processes belong to the same service and are stopped
if listener is stopped.