Date: Wed, 26 Nov 2008 20:02:05 +0200 From: "Artem Naluzhnyy" <tut@nhamon.com.ua> To: freebsd-hackers@freebsd.org Subject: crontab(5) enhancements Message-ID: <65dfa4fc0811261002w61224c0ey9ed987f3f8122db0@mail.gmail.com>
next in thread | raw e-mail | index | archive | help
Hi, I have two suggestion for newsyslog(8) and periodic(8) entries in default /etc/crontab file: * nice(1) newsyslog and periodic entries to shape CPU load spikes; * lockf(1) them to prevent simultaneous execution. So instead 1 3 * * * root periodic daily there may be 1 3 * * * root lockf -t0 /var/run/periodic.daily.lock nice -20 periodic daily In case of collision we'll receive following email: Date: Wed, 26 Nov 2008 18:16:00 +0200 (EET) From: root@tut.at.home (Cron Daemon) To: root@tut.at.home Subject: Cron <root@tut> lockf -t0 /var/run/periodic.daily.lock nice -20 periodic daily lockf: /var/run/periodic.daily.lock: already locked The configuration has been working for years on my servers without any visible drawbacks. What do you think? -- Artem Naluzhnyy
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?65dfa4fc0811261002w61224c0ey9ed987f3f8122db0>