Addresses review comment on s3api_object_handlers_multipart.go:442
Add comment documenting that part upload URLs point to the current
active filer (tracked by FilerClient), which is better than always
using the first filer but still creates a potential point of failure
if that filer becomes unavailable during upload.
Suggest TODO solutions:
- Use virtual hostname/load balancer for filers
- Have S3 server proxy uploads to healthy filers
Current behavior provides reasonable availability by using the
currently active/healthy filer rather than being pinned to first filer.
Chris Lu
e1497301cf