http://www.eztiger.org Tech tips from the weary Mon, 30 Mar 2009 22:21:56 +0000 http://backend.userland.com/rss092 en I've previously discussed how to recover from a disk failure in gmirror. It's probably a good idea to describe how to set up a new mirror from scratch. Rather handily this can be done on a live system, remotely via ssh in the space of a few minutes. One reboot is ... http://www.eztiger.org/2009/03/setting-up-gmirror-on-a-live-server-remotely/ I came across a known bug in the FreeBSD installer for the first time today. During the text network install (using the netboot iso) I had problems resolving the hostname of my chosen FTP mirror. The installer hung for an age trying to connect. Assuming I had a made a typo in ... http://www.eztiger.org/2009/03/freebsd-installer-bug/ Some quick Solaris 10 Zone management commands. To list your running zones : # zoneadm list And with a bit more detail : #zoneadm list -v Change the IP address of a Zone #zonecfg -z zonecfg:zonename> select net address=oldip zonecfg:zonename:net> set address=newip zonecfg:zonename:net> end zonecfg:zonename> commit Change the name of a Zone #zonecfg -z zonename zonecfg:zonename> set zonename=newzonename zonecfg:zonename> commit zonecfg:zonename> exit Moving a Zone ... http://www.eztiger.org/2009/03/fun-with-zones/ First a caveat : the following steps worked well on a lightly used mySQL server in production (~5 queries per second average, heavily biased to select's - spread over around 30 individual databases) but your experience may vary on more heavily loaded servers. This also uses the ports build and ... http://www.eztiger.org/2009/02/upgrading-mysql-4-to-mysql-5-in-freebsd/ To find a list of current SGE projects, use the following flags to qconf : qconf -sprjl Which can be conveniently remembered as 'show project list'. http://www.eztiger.org/2009/01/finding-all-existing-sge-projects/ A nice cheat sheet for some common SGE tasks : http://idolinux.blogspot.com/2008/09/sge-cheat-sheet.html http://www.eztiger.org/2008/11/sun-grid-engine-cheat-sheet/ Quick and dirty - this should never be needed, but in the rare events that your auto rotation cycle fails or you're just using a volume for testing and want to blank it to start from scratch, from the Bacula console enter : purge jobs volume After a short warning you can ... http://www.eztiger.org/2008/08/purging-a-backup-volume-in-bacula/ Running software RAID-1 using gmirror under FreeBSD can save some headaches. Sometimes a disk literally fails leaving you running on a spare, sometimes you just have a 'blip' during a busy period of the server which causes gmirror to drop the disk from the array. This happened today and from dmesg we ... http://www.eztiger.org/2008/08/removing-and-re-adding-a-disk-in-gmirror/ I unwittingly stumbled across a reasonably well hidden Bacula design foible today. I've noticed for some time that when doing test restores, or browsing the 'most recent backup' for a client Bacula has included files that should not be there based on the timeline of the restore. If, after performing a full ... http://www.eztiger.org/2008/08/bacula-design-feature/