Posted on Thu 22 March 2012 in hints-and-kinks • Tagged with Pacemaker
Ever wonder what's the difference between order <name> inf:
<first-resource> <second-resource> and a score of something other
than inf? We'll explain.
If you specify an order constraint score of INFINITY (inf or the
keyword mandatory in crm shell syntax), then the order constraint is
considered mandatory. If you specify 0 …
Posted on Mon 19 March 2012 in hints-and-kinks • Tagged with Pacemaker
It's not uncommon in Pacemaker clusters to run specific cron jobs only
on a node that currently runs a particular resource. The
ocf:heartbeat:symlink resource agent can be exceptionally helpful in
this situation. Here's how to use it.
Suppose you've got a cron job for Postfix whose definition normally …
Posted on Mon 19 March 2012 in presentations • Tagged with DRBD, Flashcache, Pacemaker, Performance
At linux.conf.au 2012, Florian I this presentation on the integration of DRBD, Flashcache and Pacemaker in the High Availability and Distributed Storage miniconf.
In this 30-minute presentation, I explore the benefits of Flashcache for replicated storage. Flashcache, originally developed at Facebook, is a general purpose, block level cache …
Posted on Mon 19 March 2012 in presentations • Tagged with DRBD, KVM, libvirt, Pacemaker
Tim Serong and I explore the capabilities of KVM, iSCSI, DRBD and Pacemaker to create a fully open-source enterprise cloud.
Shot at linux.conf.au 2011 in Brisbane, this is me babbling, and Tim live-cartooning to the delight of the audience.
This article originally appeared on the hastexo …
Posted on Tue 13 March 2012 in presentations • Tagged with Conference, Pacemaker