Morten, I meant to mention that although the chunk sizes and shapes are a persistent property of variables, the per-variable chunk cache sizes may be changed to match access patterns. Getting chunk sizes and shapes right requires trying to anticipate how data will be accessed later, but the right chunk cache sizes can be determined and specified each time you open a file. --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: WWQ-664381 Department: Support netCDF Priority: High Status: Closed