### Cluster-writeable probe

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

```
curl http://minio1:9001/minio/health/cluster
HTTP/1.1 503 Service Unavailable
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

	Requests chan<- []byte

	muxID uint64
	ctx   context.Context
}

// Send a payload to the remote server.
func (s *Stream) Send(b []byte) error {
	if s.Requests == nil {
		return errors.New("stream does not accept requests")
	}
	select {
	case s.Requests <- b:
		return nil
	case <-s.ctx.Done():
		return context.Cause(s.ctx)
	}
}

// Results returns the results from the remote server one by one.

	// 		// if a response to Ping is not received.
	// 		trhttp2.PingTimeout = dialTimeout
	// 		// DisableCompression, if true, prevents the Transport from
	// 		// requesting compression with an "Accept-Encoding: gzip"
	// 		trhttp2.DisableCompression = true
	// 	}
	// }

	return tr
}

// NewInternodeHTTPTransport returns transport for internode MinIO connections.

		list.eventsSkipped.Add(int64(len(list.queue)))
		return
	default:
		list.eventsSkipped.Add(1)
		err := fmt.Errorf("concurrent target notifications exceeded %d, configured notification target is too slow to accept events for the incoming request rate", maxConcurrentAsyncSend)
		for id := range targetIDset {
			reqInfo := &logger.ReqInfo{}
			reqInfo.AppendTags("targetID", id.String())

```

### 3.2 Automatic removal of noncurrent versions keeping only most recent ones after noncurrent days

It is possible to configure automatic removal of older noncurrent versions keeping only the most recent `N` using `NewerNoncurrentVersions`.

e.g, To remove noncurrent versions of all objects keeping the most recent 5 noncurrent versions under the prefix `user-uploads/` 30 days after they become noncurrent ,

```
{

	handleListener := func(idx int, listener net.Listener) {
		for {
			conn, err := listener.Accept()
			send(acceptResult{conn, err, idx})
		}
	}

	// Start separate goroutine for each TCP listener to handle connection.
	for idx, tcpListener := range listener.listeners {
		go handleListener(idx, tcpListener)
	}
}

// Accept - reads from httpListener.acceptCh for one of previously accepted TCP connection and returns the same.

	ErrInvalidBrowserValue = newErrFn(
		"Invalid console value",
		"Please check the passed value",
		"Environment can only accept `on` and `off` values. To disable Console access, set this value to `off`",
	)

	ErrInvalidFSOSyncValue = newErrFn(
		"Invalid O_SYNC value",
		"Please check the passed value",
		"Can only accept `on` and `off` values. To enable O_SYNC for fs backend, set this value to `on`",
	)

	ErrOverlappingDomainValue = newErrFn(

	exit_1
fi

if [ "${enabled_minio1}" != "Enabled" ]; then
	echo "expected bucket to be mirrored with object-lock enabled, exiting..."
	exit_1
fi

# "Test if most recent tag update is replicated"
./mc tag set minio2/newbucket "key=val1"
if [ $? -ne 0 ]; then
	echo "expecting tag set to be successful. exiting.."
	exit_1
fi

sleep 10

[Using boto3](https://github.com/minio/minio/blob/master/docs/extensions/s3zip/examples/boto3/main.py)

## Requirements and limits

- ListObjectsV2 can only list the most recent ZIP archive version of your object, applicable only for versioned buckets.
- ListObjectsV2 API calls must be used to list zip file content.
- Range requests for GetObject/HeadObject for individual files from zip is not supported.

	// GCS storage decompresses a gzipped object by default and returns the data.
	// Refer to https://cloud.google.com/storage/docs/transcoding#decompressive_transcoding
	// Need to set `Accept-Encoding` header to `gzip` when issuing a GetObject call, to be able
	// to download the object in compressed state.
	// Calling ReadCompressed with true accomplishes that.