2
read 6 min
Jul 2024
4 / 4
Jul 2024
Jul 2024
Juliana_Fernandes
Jul 2024

Hello Everyone,

I’m just starting work with mongo and I’m trying to store a 1.3GB json file that I got from a seismic segy file.
I’m using gridfs to do the import but I’ve got the error

2024-07-10T16:30:44.513-0300    Failed: an inserted document is too large

The structure of my json file is:

{
"type": "FeatureCollection",
"name": "ST0202R08_PS_PSDM_RAW_PP_TIME.MIG_RAW.POST_STACK.3D.JS-017534",
"crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:EPSG::23031" } },
"features": [
    { "type": "Feature", "properties": { "TRACE_NUMBER_WITHIN_LINE": 1, "TRACE_NUMBER_WITHIN_FILE": 1, "ORIGINAL_FIELD_RECORD_NUMBER": 0, "TRACE_NUMBER_WITHIN_ORIGINAL_FIELD_RECORD": 0, "TRACE_IDENTIFICATION_CODE": 1, "ENSEMBLE_NUMBER": 1932, "TRACE_NUMBER_WITHIN_ENSEMBLE": 1, "NUMBER_VERTICAL_SUMMED_TRACES": 1, "NUMBER_HORIZONTAL_STACKED_TRACES": 28, "DATA_USE": 1, "DISTANCE_SOURCE_GROUP": 0, "RECEIVER_GROUP_ELEVATION": 0, "SURFACE_ELEVATION_AT_SOURCE": 0, "SOURCE_DEPTH_BELOW_SURFACE": 0, "DATUM_ELEVATION_AT_RECEIVER_GROUP": 0, "DATUM_ELEVATION_AT_SOURCE": 0, "WATER_DEPTH_AT_SOURCE": 0, "WATER_DEPTH_AT_GROUP": 0, "VERTICAL_SCALAR": 1, "HORIZONTAL_SCALAR": -100, "SOURCE_X": 43872700, "SOURCE_Y": 647551400, "GROUP_X": 43872700, "GROUP_Y": 647551400, "COORDINATE_UNITS": 1, "WEATHERING_VELOCITY": 0, "SUB_WEATHERING_VELOCITY": 0, "UPHOLE_TIME_AT_SOURCE": 0, "UPHOLE_TIME_AT_GROUP": 0, "SOURCE_STATIC_CORRECTION": 0, "GROUP_STATIC_CORRECTION": 0, "TOTAL_STATIC_CORRECTION": 0, "LAG_TIME_A": 0, "LAG_TIME_B": 0, "DELAY_RECORDING_TIME": 0, "MUTE_TIME_START": 0, "MUTE_TIME_END": 1408, "SAMPLES": 1126, "SAMPLE_INTERVAL": 4000, "GAIN_TYPE": 0, "INSTRUMENT_GAIN_CONSTANT": 0, "INSTRUMENT_INITIAL_GAIN": 0, "CORRELATED": 0, "SWEEP_FREQUENCY_AT_START": 0, "SWEEP_FREQUENCY_AT_END": 0, "SWEEP_LENGTH": 0, "SWEEP_TYPE": 0, "SWEEP_TRACE_TAPER_LENGTH_AT_START": 0, "SWEEP_TRACE_TAPER_LENGTH_AT_END": 0, "TAPER_TYPE": 0, "ALIAS_FILTER_FREQUENCY": 0, "ALIAS_FILTER_SLOPE": 0, "NOTCH_FILTER_FREQUENCY": 0, "NOTCH_FILTER_SLOPE": 0, "LOW_CUT_FREQUENCY": 0, "HIGH_CUT_FREQUENCY": 0, "LOW_CUT_SLOPE": 0, "HIGH_CUT_SLOPE": 0, "YEAR": 0, "DAY_OF_YEAR": 0, "HOUR": 0, "MINUTE": 0, "SECOND": 0, "TIME_BASIC_CODE": 0, "TRACE_WEIGHTING_FACTOR": 0, "GEOPHONE_GROUP_NUMBER_OF_ROLL_SWITH": 0, "GEOPHONE_GROUP_NUMBER_OF_TRACE_NUMBER_ONE": 0, "GEOPHONE_GROUP_NUMBER_OF_LAST_TRACE": 0, "GAP_SIZE": 0, "OVER_TRAVEL": 0, "INLINE_NUMBER": 9985, "CROSSLINE_NUMBER": 1932, "SHOTPOINT_NUMBER": 0, "SHOTPOINT_SCALAR": 0, 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    ......
   ......
   .......
]
}

The file contains the informations for each seismic trace.
How should I proceed with this?

2
read 6 min
Lokesh_Reddy1Lokesh Reddy
Jul 2024

Hi @Juliana_Fernandes,

As you know, MongoDB document size must be below 16MB. If you try to store a document larger than that, it will not allow the data to be stored and will show an error like the one you mentioned:
2024-07-10T16:30:44.513-0300 Failed: an inserted document is too large.

Above mentioned JSON file seems to contain a single large document { } with a large number of elements in an array. To address this, try to:

  1. Segregate the document into multiple pieces the document must not be contains 16MB of data.
  2. Change the document structure or data modeling in this scenario.

I hope this helps!

steevejSteeve Juneau
Jul 2024

Please share the command you used. I am surprised that gridfs api failed on size limit. And note that storing a JSON document in gridfs is not really useful as you won`t be able to use MQL on the document’s content.

That is why

would be absolutely necessary if you want to query. For example, you may use jq to split your features array into separate documents.

The data is quite verbose with long names like TRACE_NUMBER_WITHIN_LINE which is really good when you publish data but not so much when you process it. I recommend shortening all those field names.


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