[FLASH-USERS] overwriting of snapshots

[guido]

Hello,

I tried it but that parameter seems to work only for checkpoint files 
because flash keeps overwriting my snapshots. Is it there a similar 
parameter for plot files ?

Regards,

On 12/11/19 15:54, Eddie Hansen wrote:
> Try adding the runtime parameter 'rolling_checkpoint' to your 
> flash.par and set it > 10000. The default value is 10000, which means 
> the code will only generate 10000 checkpoint files, and when it gets 
> to the 10000th file output it will reset back to 0 and start 
> overwriting old checkpoint files. The feature is intended to safeguard 
> against using too much disk space, but if this is not a concern for 
> you then set it > 10000.
>
> On Tue, Nov 12, 2019 at 3:15 PM guido <g.granda at irya.unam.mx 
> <mailto:g.granda at irya.unam.mx>> wrote:
>
>     Hello,
>
>     I guess this happens because flash only allows snapshots numbers of 4
>     digits.
>
>     Cheers,
>
>     On 12/11/19 14:29, guido wrote:
>     > Hello Flash users,
>     >
>     > I found out that one simulation is overwriting the last snapshot
>     > instead of writing new ones. I think this very strange because this
>     > did not happen with previous snapshots.
>     >
>     > The code keeps writing the snapshot 9999 instead of creating the
>     10000
>     > one.
>     >
>     > The flash.par used for this simulation is the following:
>     >
>     > # Runtime parameters for a generic problem
>     > # check the online documentation for runtime parameter descriptions
>     > # or look at the setup_params file in the object directory for
>     > # descriptions of parameters specific to your simulation
>     >
>     > #       Computational volume parameters
>     > #               Grid parameters
>     > geometry        = "cartesian"
>     > #               Size of computational volume
>     > xmin            = -10.0
>     > xmax            =  10.0
>     > ymin            = -0.6
>     > ymax            =  0.6
>     > #zmin            = -0.6
>     > #zmax            =  0.6
>     > # Runtime Parameters
>     > sim_rho    =1.0
>     > sim_vy     =0.0
>     > sim_vz     =0.0
>     > sim_by     =0.0
>     > sim_bz     =1.0 # this is just a factor
>     > sim_x_cent =0.0
>     > sim_y_cent =0.0
>     > sim_z_cent =0.0
>     > sim_p      =1.0
>     > sim_cs     =1.0 # check polytropic constant
>     >
>     > #sim_z_cent     =0.0
>     > #               Boundary conditions
>     > zl_boundary_type               = "periodic"
>     > zr_boundary_type               = "periodic"
>     > xl_boundary_type               = "outflow"
>     > xr_boundary_type               = "outflow"
>     > yl_boundary_type               = "periodic"
>     > yr_boundary_type               = "periodic"
>     >
>     > #       Simulation (time, I/O) parameters
>     >
>     > cfl             = 0.8
>     > basenm          = "ha_iso_"
>     > stats_file      = "ha_iso.dat"
>     > nend            = 1000000
>     > tmax            = 3.155760e14 #10 Myr
>     > dtinit          = 1.0e-3 #e-3 Myr
>     > dtmax           = 3.155760e12 #e-1 Myr
>     > dtmin           = 3.155760e-70 #
>     >
>     > #to write a checkpoint when dt< dtmin
>     > dr_dtMinBelowAction = 1
>     >
>     > restart         = .true.
>     > checkpointFileNumber= 188
>     > plotfileNumber= 941
>     > #       checkpoint file output parameters
>     > checkpointFileIntervalTime = 3.155760e13 # 1Myr
>     > checkpointFileIntervalStep = 50
>     > #       plotfile output parameters
>     > plotfileIntervalTime = 3.155760e12 #0.1 Myr
>     > plotfileIntervalStep = 10
>     >
>     > #       variables to output to plotfiles
>     > plot_var_1 = "dens"
>     > plot_var_2 = "pres"
>     > plot_var_4 = "eint"
>     > plot_var_5 = "velx"
>     > plot_var_6 = "vely"
>     > plot_var_7 = "velz"
>     > plot_var_8 = "magx"
>     > plot_var_9 = "magy"
>     > plot_var_10= "magz"
>     >
>     > # small variables
>     > small      =  1.0e-40
>     > smlrho     =  1.0E-40
>     > smallp     =  1.0E-22
>     > smalle     =  1.0e-10
>     > smallt     =  1.
>     > smallu     =  1.0E-40
>     > smallx     =  1.0E-10
>     > #      logfile parameters
>     > run_comment     = "harris current sheet"
>     > log_file        = "ha_iso.log"
>     >
>     > #    common eos parameters
>     > eintSwitch     = 1.0E-4
>     > eosMode        ="dens_pres"
>     >
>     > #    AMR refinement parameters
>     > lrefine_max       =6
>     > lrefine_min       =6
>     > refine_var_1      = "dens"
>     > #delta_ref         =0.01
>     > #delta_deref       =-0.01
>     > #reference_density =2.12e-24 # unperturbed initial density
>     > refine_var_thresh     = "dens"
>     > #USM parameters
>     > killdivb = .true. # default true
>     > flux_correct = .true.
>     > Nblockx         = 1
>     > Nblocky         = 1
>     > Nblockz         = 1
>     >
>     > # === Polytropic EOS ===
>     > usePolytrope     = .true.
>     > PolytropeDens1   = 0.0
>     > #PolytropeDens2   = 1e99
>     > #PolytropeDens3   = 1e99
>     > #PolytropeDens4   = 1e99
>     > #PolytropeDens5   = 1e99
>     > PolytropeGamma1  = 1.0
>     > #PolytropeGamma2  = 1.0
>     > #PolytropeGamma3  = 1.0
>     > #PolytropeGamma4  = 1.0
>     > #PolytropeGamma5  = 1.0
>     > PolytropeKonst   = 1.0 # sound speed squared (cs^2)
>     >
>     > Do you see anything in my flash.par that might cause this error?
>     I'm
>     > using flash 4.5 by the way.
>     >
>     > Kind Regards,
>     >
>
>
>
> -- 
> Eddie Hansen, PhD
> Postdoctoral Scholar
> University of Chicago
> 607-341-6126 | Flash Center
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