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Month November 2016

DNS Timeouts in DUALSTACK Umgebungen

A few days ago, we had some strengh phenomenon on our Oracle RAC Servern with TNSListener Timeouts. EM Event: Critical:LISTENER_SCAN3_rac-scan – Listener response to a TNS ping is 5,010 msecs After some research and many hours of analysing, we could… Continue Reading →

Oracle RAC Backup with Backup Exec

All configurations needs to be done on every RAC-Node. All shell-outputs are examples. Prerequisites Oratab and Beoratab The following step are essential on every RAC-Instance. cp /etc/oratab /etc/VRTSralus/beoratab Setting the permissions for the beoratab: chown root:beoper /etc/VRTSralus/beoratab chmod g+w /etc/VRTSralus/beoratab… Continue Reading →

SUDO Settings for Zabbix

To use tools like Multipath in zabbix, you have to check the sudo-settings for the zabbixuser. Use visudo to change the permissions for zabbix. Zabbix will not use a Terminal tty, so you should deactivate that in sudo… You can… Continue Reading →

Zabbix-userparameter – checking the multipathing

Here are some “quick & dirty” working userparameter for Zabbix :), they check: how many paths per device are available, if some of that paths are in a faulty state Number of paths UserParameter=Count.Multipath.Devices, echo $(( $(echo ‘show paths’ |… Continue Reading →

Zabbix sizing

Zabbix, a good and extensive monitoringsystem, which is a great alternative to the well known monitoringsystems like Cacti and Nagios. In the beginning of building a monitoringsystem, there is always a bit planing before build it up and of course… Continue Reading →

The moment when…

… you have to contact a Network Delivery Lead… This week i had to contact a network specialist from a big international company. Magnificent… We can’t reach a destination over their vpn-tunnel. I send him the IP-addresses from the source… Continue Reading →

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