## Implementation

ILM tiering takes place when a object placed in the bucket meets lifecycle transition rules and becomes eligible for tiering. MinIO scanner (which runs at one minute intervals, each time scanning one sixteenth of the namespace), picks up the object for tiering. The data is moved to the remote tier in entirety, leaving only the object metadata on MinIO.

func (n NoncurrentVersionTransition) NextDue(obj ObjectOpts) (time.Time, bool) {
	if obj.IsLatest || n.StorageClass == "" {
		return time.Time{}, false
	}
	// Days == 0 indicates immediate tiering, i.e object is eligible for tiering since it became noncurrent.
	if n.NoncurrentDays == 0 {
		return obj.SuccessorModTime, true
	}
	return ExpectedExpiryTime(obj.SuccessorModTime, int(n.NoncurrentDays)), true

	if !obj.IsLatest || t.IsNull() {
		return time.Time{}, false
	}

	if !t.IsDateNull() {
		return t.Date.Time, true
	}

	// Days == 0 indicates immediate tiering, i.e object is eligible for tiering since its creation.
	if t.Days == 0 {
		return obj.ModTime, true
	}
	return ExpectedExpiryTime(obj.ModTime, int(t.Days)), true

## Prerequisites

- One or both of Veeam Backup and Replication with support for S3 compatible object store (e.g. 9.5.4) and Veeam Backup for Office365 (VBO)

		methods: []string{http.MethodDelete, http.MethodPut, http.MethodGet},
		queries: []string{"ownershipControls", ""},
	},
	{
		api:     "intelligent-tiering",
		methods: []string{http.MethodDelete, http.MethodPut, http.MethodGet},
		queries: []string{"intelligent-tiering", ""},
	},
	{
		api:     "analytics",
		methods: []string{http.MethodDelete, http.MethodPut, http.MethodGet},
		queries: []string{"analytics", ""},
	},

	exit 1
fi

got_checksum=$(./mc cat myminio/bucket2/dsync/drwmutex.go | md5sum)
if [ "${expected_checksum}" != "${got_checksum}" ]; then
	echo "BUG: decommission failed on encrypted objects with tiering: expected ${expected_checksum} got ${got_checksum}"
	exit 1
fi

(
	cd ./docs/debugging/s3-check-md5
	go install -v
)

                "DeleteMarker": true
            },
            "Status": "Enabled"
        }
    ]
}
```

## 4. Enable ILM transition feature

	}

	meta[xhttp.AmzObjectTagging] = oi.UserTags
	meta[xhttp.AmzTagDirective] = "REPLACE"

	if sc == "" {
		sc = oi.StorageClass
	}
	// drop non standard storage classes for tiering from replication
	if sc != "" && (sc == storageclass.RRS || sc == storageclass.STANDARD) {
		meta[xhttp.AmzStorageClass] = sc
	}

	meta[xhttp.MinIOSourceETag] = oi.ETag

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Sarvesh Dubey, Sasan Jafarnejad, Sergii Khomenko, Shane Smiskol, Shaochen Shi,
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