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Regrid more RAM efficiently #24

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Nov 6, 2023
Merged

Regrid more RAM efficiently #24

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9 changes: 6 additions & 3 deletions pvnet_app/app.py
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Original file line number Diff line number Diff line change
Expand Up @@ -124,12 +124,15 @@ def regrid_nwp_data(nwp_path):
return

logger.info("Regridding NWP to expected grid")
# Its more efficient to regrid eagerly

# Pull the raw data into RAM
ds_raw = ds_raw.compute()

# Regrid
# Regrid in RAM efficient way by chunking first. Each step is regridded separately
regridder = xe.Regridder(ds_raw, ds_target_coords, method="bilinear")
ds_regridded = regridder(ds_raw)
ds_regridded = regridder(
ds_raw.chunk(dict(x=-1, y=-1, step=1))
).compute(scheduler="single-threaded")

# Re-save - including rechunking
os.system(f"rm -fr {nwp_path}")
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