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operations: ensure concurrency is no greater than the number of chunks - fixes #7299

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Pat Patterson 2023-09-12 23:18:06 -07:00 committed by Nick Craig-Wood
parent d29d263329
commit 71f2883562
1 changed files with 6 additions and 5 deletions
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11
fs/operations/multithread.go
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@ -172,17 +172,18 @@ func multiThreadCopy(ctx context.Context, f fs.Fs, remote string, src fs.Object,
info.ChunkSize = src.Size()
}
// Use the backend concurrency if it is higher than --multi-thread-streams or if --multi-thread-streams wasn't set explicitly
if !ci.MultiThreadSet || info.Concurrency > concurrency {
fs.Debugf(src, "multi-thread copy: using backend concurrency of %d instead of --multi-thread-streams %d", info.Concurrency, concurrency)
concurrency = info.Concurrency
}
numChunks := calculateNumChunks(src.Size(), info.ChunkSize)
if concurrency > numChunks {
fs.Debugf(src, "multi-thread copy: number of streams %d was bigger than number of chunks %d", concurrency, numChunks)
concurrency = numChunks
}
// Use the backend concurrency if it is higher than --multi-thread-streams or if --multi-thread-streams wasn't set explicitly
if !ci.MultiThreadSet || info.Concurrency > concurrency {
fs.Debugf(src, "multi-thread copy: using backend concurrency of %d instead of --multi-thread-streams %d", info.Concurrency, concurrency)
concurrency = info.Concurrency
}
if concurrency < 1 {
concurrency = 1
}