Hello Yu Liu,

sorry for the very late response.

There seem to be two questions in your email:

1. how to output a particular variable 2. about the layout of output directories in simfactory

To output ADMMass::ADMMass_box the varariable needs to first be computed (or more accurate have storage allocated for it, which is what the warning is about). The ADMMass thorn's schedule.ccl file (repos/einsteinanalysis/ADMMass/schedule.ccl) shows that STORAGE for ADMMass_box is only enabled during the group ADMass:

--8<-- schedule GROUP ADMMass AT POSTSTEP AFTER ADMMass_SetLoopCounter WHILE ADMMass::ADMMass_LoopCounter { STORAGE:ADMMass_GFs_surface[3] STORAGE:ADMMass_GFs_volume[3] STORAGE:ADMMass_box STORAGE:grid_spacing_product } "ADMMass loop" --8<--

which means it cannot be output since storage is turned off once the group of functions finish executing. The variable is a temporary variable only.

If you do need to output them you will have to copy the STORAGE statements into the top level of schedule.ccl ie outside of any GROUP or FUNCTION schedule block (see the couple of STORAGE statements at the beginning of the file).

I cannot say though whether or not the output will be sensible, i.e. it is possible that ADMMass_box contains the physical location inside of each component (or each refinement level) and not some sort of global box. Since I am not familiar with actual ADMMass code, I cannot tell either way and can only advise you to check the code to see what ADMMass_box will contain.

For your second question: output-0000-active is a symbolic link to output-0000. With simfactory there can be multiple output segments output-0000, output-0001, output-0002 etc each for the data produced during one checkpoint-recovery cycle. Exactly one of those will be "active" and has a symbolic link to it that ends in -active. That one is the one that is currently executing (or queued up to executed with the cluster's queuing system).

Yours, Roland

Hello Cactus users,

I am new to Einstein Toolkit. I want to write a simple parameter file, according to my understanding of Thorn. When I use the Thorn in EinsteinAnalysis, I encountered a warning (Level 1) and CarpetIOBasic can't output normally.

I couldn't find the reason for the warning, because the warning message is brief.

------------------------ par file ----------------------- ###################################### # Flesh parameters ###################################### Cactus::terminate = "iteration" Cactus::cctk_itlast = 0

###################################### # Coordinate ###################################### ActiveThorns = "Carpet CarpetLib CoordBase CartGrid3D"

Carpet::domain_from_coordbase = yes CartGrid3D::type = "coordbase" CartGrid3D::domain = "full"

CoordBase::domainsize = "minmax"

CoordBase::xmin = -20.0 CoordBase::ymin = -20.0 CoordBase::zmin = -20.0 CoordBase::xmax = +20.0 CoordBase::ymax = +20.0 CoordBase::zmax = +20.0 CoordBase::dx = 1 CoordBase::dy = 1 CoordBase::dz = 1

driver::ghost_size = 3 ###################################### # Boundary ###################################### ActiveThorns = "boundary symbase"

CoordBase::boundary_size_x_lower = 3 CoordBase::boundary_size_y_lower = 3 CoordBase::boundary_size_z_lower = 3 CoordBase::boundary_size_x_upper = 3 CoordBase::boundary_size_y_upper = 3 CoordBase::boundary_size_z_upper = 3

###################################### # Initial Condition ###################################### ActiveThorns = "ADMBase"

ADMBase::initial_data = "Cartesian Minkowski" ADMBase::initial_lapse = "one" ADMBase::initial_shift = "zero" ADMBase::initial_dtlapse = "zero" ADMBase::initial_dtshift = "zero"

###################################### # Analysis ###################################### ActiveThorns = "ADMMass StaticConformal SpaceMask ADMMacros" ADMMass::ADMMass_surface_distance[0] = 12

###################################### # IO ###################################### ActiveThorns = "IOUtil CarpetIOBasic CarpetReduce CarpetIOASCII CarpetIOHDF5 CarpetIOScalar"

IO::out_dir = $parfile IO::out_every = 1

IOBasic::outInfo_vars = "ADMMass::ADMMass_box"

------------------------ Warning -------------------- WARNING[L1,P0] (CarpetIOBasic): Cannot output variable "ADMMASS::ADMMass_box_x_max" because it has no storage

I also want to know the difference between output-0000 and output-0000-active in simulation directory.

Thanks, Yu Liu

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Yu Liu PhD Student School of Physics Huazhong University of Science and Technology