Appliances created prior to CA 3Tera AppLogic 2.3 use the volfix mode of configuration. When starting an appliance that uses the volfix mode, CA 3Tera AppLogic mounts its boot volume on the grid controller in order to update the appliance's configuration (properties, network settings, etc). Beginning with CA 3Tera AppLogic 2.3, appliances can make use of the new DHCP configuration mode which deprecates the volfix mode. When using the DHCP mode, an appliance configures itself through its default interface which results in greater reliability, is more flexible and improves significantly the application's starting time. Using the DHCP mode also cuts down on the amount of I/O generated by the grid controller.
This document describes how to upgrade your CA 3Tera AppLogic appliances and applications to use the new DHCP configuration mode. It is divided into 2 sections. The first section describes how to upgrade an appliance to use the new DHCP configuration mode. The second section describes how to upgrade your application to use the newly upgraded appliances. It is recommended to read through this entire document before trying to upgrade your appliances and applications.
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