  The VDFS comprises the system to pipeline process and archive the data from
infrared observations taken by both the WFCAM instrument on UKIRT and the
forthcoming VISTA telescope. These include the largest near-IR surveys to date,
such as UKIDSS, which produce terabyte sized catalogues of over 10^9 rows. Such
large data volumes present a performance challenge when the catalogue data,
stored in a relational database, require many iterations of astrometric and
photometric recalibration. Here we present the VDFS recalibration solution that
will be employed in the WSA from the forthcoming UKIDSS Data Release 4 and VSA
from its inception.
