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scanner: Shuffle disks to scan (#12036)
Ensure random association between disk and bucket in each crawling iteration to ensure that ILM applies correctly to objects not present in all disks.
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@ -435,6 +435,11 @@ func (er erasureObjects) nsScanner(ctx context.Context, buckets []BucketInfo, bf
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}
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}()
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// Shuffle disks to ensure a total randomness of bucket/disk association to ensure
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// that objects that are not present in all disks are accounted and ILM applied.
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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r.Shuffle(len(disks), func(i, j int) { disks[i], disks[j] = disks[j], disks[i] })
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// Start one scanner per disk
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var wg sync.WaitGroup
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wg.Add(len(disks))
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