On 14-10-24 05:28 AM, Andrea Carpani wrote:
On 24/10/2014 12:47, Kern Sibbald wrote:
No, the SD and the FD cannot be reloaded. On the FD in principle it
would be easy, but on the SD, it would be complicated if drives
changed. What would you do with Jobs that are using a drive that
would be removed from the reload?
I'm not that deep into backup software, so maybe I'm saying something
stupid, but a config reload could do the same thing that other software
do, that is:
- continue servicing current requests with the previous conf and
- use the new conf for new requests.
Something like a graceful restart apache does.
Does this make sense?
.a.c.
Sense to humans yes, sense to program code not so much.
The nature of the SD is that its configuration should almost never
change - all it has for config is an inventory of hardware devices.
There's a certain elegance in simplicity that would be lost trying to
cover what should be a fairly narrow use case.
Imagine all the debugging you have to do - is this job failing because
it is trying to use the config as it appears in the config file, or some
other config in memory from some time in the past? What happens if we
now have different device names referring to the same physical device,
we now need a whole locking mechanism that can cover the use case of
multiple versions of the SD config accessing the same physical device,
possibly with different parameters and names. How would you be able to
tell which version of the config a given job is using? Remember it is
easy to start a backup job that can last a couple of days - a full
backup of a huge fileserver for instance.
Things would get really messy really fast, with practically no benefit.
Your SD config likely changes what, once or twice per year? If that?
It is much safer to just restart the SD when you have an idle period
between backups.
Bryn
------------------------------------------------------------------------------
_______________________________________________
Bacula-users mailing list
Bacula-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bacula-users
