Klaus Post 33cee9f38a Improve multipart upload (#12514) ...

Each multipart upload is holding a read lock for the entire upload 
duration of each part.

This makes it impossible for other parts to complete until all currently 
uploading parts have released their locks.

It will also make it impossible for new parts to start as long as the 
write lock is still being requested, essentially deadlocking uploads 
until all that may have been granted a read lock has been completed.

Refactor to only hold the upload id lock while reading and writing 
the metadata, but hold a part id lock while the part is being uploaded.

2021-06-16 13:21:36 -07:00

32 KiB

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