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Add compression filters #1579

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9 changes: 7 additions & 2 deletions src/Checkpointer.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -102,7 +102,8 @@ function checkpoint_model_cache(
@info "Saving checkpoint $(nameof(sim)) model cache to JLD2 on day $day second $sec"
pid = ClimaComms.mypid(comms_ctx)
output_file = joinpath(output_dir, "checkpoint_cache_$(pid)_$(nameof(sim))_$t.jld2")
JLD2.jldsave(output_file, cache = p)
filters = [JLD2.Shuffle(), JLD2.ZstdFilter(1)]
JLD2.jldsave(output_file, filters, cache = p)

# Remove previous checkpoint if it exists
prev_checkpoint_file = joinpath(
Expand Down Expand Up @@ -163,8 +164,12 @@ function checkpoint_sims(cs::Interfacer.CoupledSimulation)
pid = ClimaComms.mypid(comms_ctx)
@info "Saving coupler fields to JLD2 on day $day second $sec"
output_file = joinpath(output_dir, "checkpoint_coupler_fields_$(pid)_$time.jld2")
# Apply shuffle filter to groups same-order bytes together to improve
# compression
# Apply ZstdFilter with level 1 to priortize speed over compression
filters = [JLD2.Shuffle(), JLD2.ZstdFilter(1)]
# Adapt to Array move fields to the CPU
JLD2.jldsave(output_file, coupler_fields = CC.Adapt.adapt(Array, cs.fields))
JLD2.jldsave(output_file, filters, coupler_fields = CC.Adapt.adapt(Array, cs.fields))

# Remove previous Coupler fields checkpoint if it exists
prev_checkpoint_file =
Expand Down
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