Accept-Ranges: bytes
Content-Length: 0
Server: MinIO
Vary: Origin
X-Amz-Bucket-Region: us-east-1
X-Minio-Write-Quorum: 3
X-Amz-Request-Id: 16239D6AB80EBECF
X-Xss-Protection: 1; mode=block
Date: Tue, 21 Jul 2020 00:36:14 GMT
```

### Cluster-readable probe

The reply is '200 OK' if cluster has read quorum if not it returns '503 Service Unavailable'.

```
curl http://minio1:9001/minio/health/cluster/read

	unset MINIO_CI_CD
	unset CI

	args=()
	for i in $(seq 1 4); do
		args+=("http://localhost:$((start_port + i))${WORK_DIR}/mnt/disk$i/ ")
	done

	for i in $(seq 1 4); do
		"${MINIO[@]}" --address ":$((start_port + i))" ${args[@]} 2>&1 >"${WORK_DIR}/server$i.log" &
	done

	# Wait until all nodes return 403
	for i in $(seq 1 4); do

file will take 200 MiB space. But, if you use ten data and six parity drives, same 100 MiB file takes around 160 MiB. If you use 14 data and
two parity drives, 100 MiB file takes only approximately 114 MiB.

Below is a list of data/parity drives and corresponding _approximate_ storage space usage on a 16 drive MinIO deployment. The field _storage

				return
			}
		}
	}
	o = bts
	return
}

// Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message
func (z *MetricsGroupV2) Msgsize() (s int) {
	s = 1 + 14 + msgp.DurationSize + 17 + z.metricsGroupOpts.Msgsize()
	return

func (z *SRMetric) Msgsize() (s int) {
	s = 1 + 13 + msgp.StringPrefixSize + len(z.DeploymentID) + 9 + msgp.StringPrefixSize + len(z.Endpoint) + 14 + msgp.DurationSize + 11 + msgp.TimeSize + 7 + msgp.BoolSize + 8 + z.Latency.Msgsize() + 15 + msgp.Int64Size + 16 + msgp.Int64Size + 7 + z.Failed.Msgsize()
	return
}

// DecodeMsg implements msgp.Decodable

	_ = x[osMetricOpenFileRFd-7]
	_ = x[osMetricOpen-8]
	_ = x[osMetricOpenFileDirectIO-9]
	_ = x[osMetricLstat-10]
	_ = x[osMetricRemove-11]
	_ = x[osMetricStat-12]
	_ = x[osMetricAccess-13]
	_ = x[osMetricCreate-14]
	_ = x[osMetricReadDirent-15]
	_ = x[osMetricFdatasync-16]
	_ = x[osMetricSync-17]
	_ = x[osMetricLast-18]
}

	buf := new(bytes.Buffer)

	buf.Write([]byte{13, ':', 'm', 'e', 's', 's', 'a', 'g', 'e', '-', 't', 'y', 'p', 'e', 7, 0, 5, 'e', 'r', 'r', 'o', 'r'})

	buf.Write([]byte{14, ':', 'e', 'r', 'r', 'o', 'r', '-', 'm', 'e', 's', 's', 'a', 'g', 'e', 7})
	binary.Write(buf, binary.BigEndian, uint16(len(errorMessage)))
	buf.Write(errorMessage)

export MINIO_CI_CD=1

if [ ! -f ./mc ]; then
	os="$(uname -s)"
	arch="$(uname -m)"
	wget -O mc https://dl.minio.io/client/mc/release/${os,,}-${arch,,}/mc &&
		chmod +x mc
fi

for i in $(seq 1 4); do
	s3Port="$((9000 + i))"
	consolePort="$((s3Port + 1000))"

	cat <<EOF >/tmp/minio.configfile.$i
version: v1
address: ':${s3Port}'
console-address: ':${consolePort}'
rootUser: 'minr0otUS2r'

	{dataBlocks: 6, onDisks: 12, offDisks: 0, blocksize: int64(oneMiByte), data: oneMiByte, offset: oneMiByte, length: 0, algorithm: BLAKE2b512, shouldFail: false, shouldFailQuorum: false},
	// 4
	{dataBlocks: 7, onDisks: 14, offDisks: 0, blocksize: int64(oneMiByte), data: oneMiByte, offset: 3, length: 1024, algorithm: DefaultBitrotAlgorithm, shouldFail: false, shouldFailQuorum: false},                    // 5

// Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message
func (z *BatchReplicateFilter) Msgsize() (s int) {
	s = 1 + 10 + msgp.DurationSize + 10 + msgp.DurationSize + 13 + msgp.TimeSize + 14 + msgp.TimeSize + 5 + msgp.ArrayHeaderSize
	for za0001 := range z.Tags {
		s += z.Tags[za0001].Msgsize()
	}
	s += 9 + msgp.ArrayHeaderSize
	for za0002 := range z.Metadata {
		s += z.Metadata[za0002].Msgsize()