Registration for XRootD@UCSD workshop, January 27-29 2015. Registration fee is $60 and the social event at the Porter's pub on Wednesday afternoon, 3pm to 6pm, is $40. The social event is optional but highly recommended, there is much to discuss! Preferred way of paying the fees is through PayPal, either with a credit card or with your PayPal account. On-site payment is cash-only in US dollars and should only be used as an exception. After registering you will be given the link to the PayPal page. Link to this page will also be in your confirmation email so you can pay at a later time. Please make your payments by December 27 2014 as the workshop services need to be paid in advance.