Hi Adam, GPFS nodes can be licensed in two different ways. As a node with storage locally attached (called NSDs), or as a client node that connects to NSD servers. My Virtual servers are client nodes, and thus have an appropriate client license (these are cheap). They connect via GPFS's RDMA over Infiniband to my GPFS NSD servers which are a much more expensive license. The purpose of me doing it this way was to let me use storage already allocated to GPFS for my cluster without having to dedicate any luns to Virtual servers. Cheers, Evan. >Hi Evan, > >Thanks for the response. Just out of curiosity, do you have to pay the >extra licensing costs for each CentOS node? > >best, > >...adam This message and any attachments contain information that may be RMS Inc. confidential and/or privileged. If you are not the intended recipient (or authorized to receive for the intended recipient), and have received this message in error, any use, disclosure or distribution is strictly prohibited. If you have received this message in error, please notify the sender immediately by replying to the e-mail and permanently deleting the message from your computer and/or storage system.