Spawn many small reprojection tasks #41
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… Futures works correctly.
…rac-institute/kbmod-wf into issue/40/smaller-reproj-tasks
drewoldag
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Sep 10, 2024
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If this PR is ultimately merged to main, we should delete this file. I only created it initially to ensure that using Futures in a specific way would not block the workflow. Specifically on line 217 of this file, the input for the next task is defined as [i.result() for i in list_of_futures].
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This initial commit begins to assemble a workflow that will generate many small reprojection tasks that each ingest a single workunit shard for reprojection. This allows a task to use only 1 cpu and a small amount of memory instead of 32+ cpus and a large amount of memory.
A separate workflow has been created to support this approach in the file
parallel_repro_single_chip_wf.py. It makes use of a simplified reprojection, specifically using astropy'sreproject_adaptive. This approach is likely fine for the single night, single chip scenario, but is not generally correct in the case of either multiple chips, or images with identical timestamps.