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S3 parallel downloader with good performance
Currently there is a risk that the download will fail if the file size is not a multiple of mmap.ALLOCATIONGRANULARITY
.
This is because each worker creates a memory map of the destination file, and the last chunk has no special treatment when not a multiple of 4KB.
Using multiprocess
is annoying because daemon processes cannot spawn other processes.
Instead of creating an mmap per worker process, we should create a single mmap in the main process, and then just slice a memoryview
of this mmap
in each worker.
Should be rather close performance wise (benchmarked locally) but would make the code cleaner.
Hi,
awesome library. Thanks a lot. Do you have plans to add support for folder downloads?
Thanks,
legout
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