Proxy Vs Phantom

Basic rules of a service group is that you must be able to offline it and online it, and this is not possible if you don't have any OnOff resources in the group, in which case you could add a dummy "FileOnOff" resource, but the Phantom resource was designed for this.

Also note, never try to manually offline or online the Phantom resource - always offline or online the group.  I has a customer who tried to offline the Phantom resource and it hung VCS, so had to force stop the cluster.

Mike

Hi,

Not sure if someone can share a real scenario from any customer, but based on above explanations, its pretty clear on when are you going to use each resource type. VCS Bundled agents guide talks about typical examples & depictions

1. Proxy resource -  If you have limited network cards in your cluster nodes, you would want to configure NIC resource in 1 group or multinic resources in parallel service group while configuring proxy resource in other service groups on same cluster. Typical example & depiction is shown here

https://sort.symantec.com/public/documents/sfha/6.1/solaris/productguides/html/vcs_bundled_agents/ch06s03s01.htm

2. Phantom resource - as explained above, you would need a phantom resource to help VCS to understand the status of any group which only contains persistent resource like NIC. Phantom is used mostly in parallel service groups only. Here is a typical scenario of phantom being used

https://sort.symantec.com/public/documents/sfha/6.1/solaris/productguides/html/vcs_bundled_agents/ch06s04s01.htm

G

G