[Wrf-users] memory space for long simulations

[afwande juliet]

Hi all users

How do users go about this issue of frames_per_outfile? I am doing 5years
simulations for 3 different cases. The interval_seconds =21600(6hours).
That means each case there will be 7300files*3=22000files(total files).
I read somewhere that max space for frames_per_outputfile=2GB. I guess if
the 5years run is complete the total disk space will be 20T which the
cluster am using has .
I don't want to have many files; If possible all files in one big file BUT
I am afraid doing this will make model stop giving output due to
insufficient memory.

Can someone help me how to go about this!!


&time_control
 !run_days                            = 0,
 !run_hours                           = 96,
 !run_minutes                         = 0,
 !run_seconds                         = 0,
 start_year                          = 1997,
 start_month                         = 02,
 start_day                           = 01,
 start_hour                          = 00,
 start_minute                        = 00,
 start_second                        = 00,
 end_year                            = 2006,
 end_month                           = 12,
 end_day                             = 31,
 end_hour                            = 00,
 end_minute                          = 00,
 end_second                          = 00
 interval_seconds                    = 21600
 input_from_file                     = .false.,
 history_interval                    = 180,
 frames_per_outfile                  = 100,
 restart                             = .false.,
 restart_interval                    = 1440,
 io_form_history                     = 2
 io_form_restart                     = 2
 io_form_input                       = 2
 io_form_boundary                    = 2
 debug_level                         = 100
 auxinput4_inname                    = "wrflowinp_d<domain>"
 auxinput4_interval                  = 360,
 io_form_auxinput4                   = 2,
  /
 &domains
 time_step                           = 200,
 time_step_fract_num                 = 0,
 time_step_fract_den                 = 1,
 max_dom                             = 1,
 e_we                                = 250,
 e_sn                                = 150,
 e_vert                              = 51,
 p_top_requested                     = 5000,
 num_metgrid_levels                  = 38,
 num_metgrid_soil_levels             = 4,
 dx                                  = 36000, 12000,  3333.33,
 dy                                  = 36000, 12000,  3333.33,
 grid_id                             = 1,
 parent_id                           = 0,
 i_parent_start                      = 1,
 j_parent_start                      = 1,
 parent_grid_ratio                   = 1,
 parent_time_step_ratio              = 1,
 feedback                            = 1,
 smooth_option                       = 0,
  /
 &physics
 mp_physics                          = 6,
 ra_lw_physics                       = 4,
 ra_sw_physics                       = 4,
 radt                                = 30,
 sf_sfclay_physics                   = 1,
 sf_surface_physics                  = 2,
 bl_pbl_physics                      = 1,
 bldt                                = 0,
 cu_physics                          = 1,
 cudt                                = 5,
 kfeta_trigger                       = 1,
 cu_rad_feedback                     = .true.,
 isfflx                              = 1,
 sst_update                          = 1,
 tmn_update                          = 1,
 sst_skin                            = 1,
 bucket_mm                           = 100.0,
 bucket_J                            = 1.e9,
 ifsnow                              = 1,
 icloud                              = 1,
 surface_input_source                = 1,
 num_soil_layers                     = 4,
 sf_urban_physics                    = 0,
  /
 &fdda
 grid_fdda = 2,
 gfdda_inname = "wrffdda_d<domain>",
 gfdda_interval_m = 360,
 gfdda_end_h = 52560,
 io_form_gfdda = 2,
 fgdt = 0,
 if_no_pbl_nudging_uv = 1,
 if_no_pbl_nudging_t = 1,
 if_no_pbl_nudging_q = 1,
 if_no_pbl_nudging_ph = 1,
 if_zfac_uv = 1,
 k_zfac_uv = 18,
 if_zfac_t = 1,
 k_zfac_t = 18,
 if_zfac_q = 1,
 k_zfac_q = 18,
 if_zfac_ph = 1,
 k_zfac_ph = 18,
 guv = 0.0003,
 gt = 0.0003,
 gq = 0.0003,
 gph = 0.0003,
 xwavenum = 9,
 ywavenum = 5,
 if_ramping = 0,
 dtramp_min = 60.0,
  /
 &dynamics
 w_damping                           = 1,
 diff_opt                            = 1,      1,      1,
 km_opt                              = 4,      4,      4,
 diff_6th_opt                        = 0,      0,      0,
 diff_6th_factor                     = 0.12,   0.12,   0.12,
 base_temp                           = 290.
 damp_opt                            = 3,
 zdamp                               = 5000.,  5000.,  5000.,
 dampcoef                            = 0.2,    0.2,    0.2
 khdif                               = 0,      0,      0,
 kvdif                               = 0,      0,      0,
 non_hydrostatic                     = .true., .true., .true.,
 moist_adv_opt                       = 1,      1,      1,
 scalar_adv_opt                      = 1,      1,      1,
 /
 &bdy_control
 spec_bdy_width                      = 10,
 spec_zone                           = 1,
 relax_zone                          = 9,
 specified                           = .true., .false.,.false.,
 nested                              = .false., .true., .true.,
 spec_exp                            = 0.33,
 /
 &grib2
 /
 &namelist_quilt
 nio_tasks_per_group = 0,
 nio_groups = 1,
 /



Thanks afwande

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