F20 System Wide Change: No Default Sendmail

[Lennart Poettering]

On Sat, 20.07.13 09:00, Robert Nichols (rnicholsNOSPAM at comcast.net) wrote:

> On 07/15/2013 09:14 AM, Lennart Poettering wrote:
> >This feature is about not doign local mail delivery by default, by not
> >installing any MTA. Instead you find the log output of cronjobs at the
> >same place as you find any other log output, the journal/syslog, for
> >example accessible via:
> >
> >journalctl -u crond
> >
> >or
> >
> >systemctl status crond
> >
> >(the latter will only show you 10 log lines by default, the former all
> >of them. You can pass "-n 100" to either to see the 100 latest ones)
> 
> You are thinking only about error output from cron jobs.  Regular
> output from cron jobs can be quite voluminous. Is it reasonable to send
> 15 to 20 Kilobytes to the journal (root's logwatch job currently sends
> that much every day)? How about a couple of JPGs (graphs of resource
> usage)?

The journal supports 2^64 sized binary objects to be stored in it. It
currently will get a bit slow if you actually send a lot of data sind it
first needs to XZ compress the blobs before writing them to disk and
that will stall operation for that time, but a few 100K (or even MB) in
a single message should be no problem.

(Note that the way cron's mail support works you cannot use it directly
to send JPEGs...)

Lennart

-- 
Lennart Poettering - Red Hat, Inc.