CDO

I have a NetCDF file with more than 500000 files merged by their id (vid). the data is a time series from >500000 points with no lat. and lon. information.

I am trying to split the file using splitname and other related functions but it's not working. it works with nco (ncks -d var vid,1 in out)but this is very slow and takes about a week. Is there any code/ method in CDO to split the files using the vid and all the corresponding information, particularly the prcp ?

dimensions:
            time = UNLIMITED ; // (35 currently)
            bnds = 2 ;
            vid = 562321 ;
     variables:
           double time(time) ;
                  time:standard_name = "time" ;
                  time:bounds = "time_bnds" ;
                  time:units = "days since 1989-1-1 00:00:00" ;
                  time:calendar = "proleptic_gregorian" ;
                  time:axis = "T" ;
           double time_bnds(time, bnds) ;
           int    vid(vid) ;
                  vid:standard_name = "projection_x_coordinate" ;
                  vid:long_name = "unique identifier" ;
                  vid:units = "1" ;
                  vid:axis = "X" ;
          int crs ;
                crs:grid_mapping_name = "latitude_longitude" ;
          float prcp(time, vid) ;
                prcp:long_name = "upstream water storage" ;
                prcp:units = "mm" ;
                prcp:CDI_grid_type = "unstructured" ;
                prcp:grid_mapping = "crs" ;
                prcp:coordinates = "lat lon" ;
                prcp:cell_methods = "time: mean" ;
Best regards,

Solomon