Resilient infrastructures are only useful if they actually stay resilient

Ask yourself a question: for every piece of resiliency you supposedly have in your network, are you really positive that it’s not running in a degraded state? Really, really sure? Sometimes, it’s basic: are you being alerted when any disk array attached to any server suffers a disk failure? Very often, it’s not: for your SAN-attached systems, are you positive that the multipathing is green? If you’re connected to two storage processors or controllers, can the server see two paths to each of them? Are you getting alerted if you can’t? Are your port channels running over the number of … Continue Reading →