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In the current design, OpenWriterAt provides the interface for random-access writes, and openChunkWriterFromOpenWriterAt wraps this interface to enable parallel chunk uploads using multiple goroutines. A global connection pool is already in place to manage SMB connections across files. However, currently only one connection is used per file, which makes multiple goroutines compete for the connection during multithreaded writes. This changes create separate connections for each goroutine, which allows true parallelism by giving each goroutine its own SMB connection Signed-off-by: sudipto baral <sudiptobaral.me@gmail.com>