if errors.Is(err, errNoHealRequired) {
			countNoHeal++
		}
		r.DiskCount += result.DiskCount
		r.SetCount += result.SetCount
		r.Before.Drives = append(r.Before.Drives, result.Before.Drives...)
		r.After.Drives = append(r.After.Drives, result.After.Drives...)
	}

	// No heal returned by all serverPools, return errNoHealRequired
	if countNoHeal == len(z.serverPools) {
		return r, errNoHealRequired
	}

          "hide": false,
          "instant": true,
          "legendFormat": ".",
          "range": false,
          "refId": "B"
        }
      ],
      "title": "Total Online/Offline Drives",
      "type": "gauge"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {

mc event list myminio/images
arn:minio:sqs::1:amqp s3:ObjectCreated:*,s3:ObjectRemoved:* Filter: suffix=”.jpg”
```

### Step 3: Test on RabbitMQ

The python program below waits on the queue exchange `bucketevents` and prints event notifications on the console. We use [Pika Python Client](https://www.rabbitmq.com/tutorials/tutorial-three-python.html) library to do this.

```py
#!/usr/bin/env python
import pika

			if disk == nil || !disk.IsOnline() {
				parityDrives++
				offlineDrives++
				continue
			}
		}

		if offlineDrives >= (len(storageDisks)+1)/2 {
			// if offline drives are more than 50% of the drives
			// we have no quorum, we shouldn't proceed just
			// fail at that point.
			return ObjectInfo{}, toObjectErr(errErasureWriteQuorum, bucket, object)
		}

		defer metaDataPoolPut(buf)
		if err != nil {
			return err
		}
		// First writes for special situations do not write to stable storage.
		// this is currently used by
		// - emphemeral objects such as objects created during listObjects() calls
		ok := volume == minioMetaMultipartBucket // - newMultipartUpload() call must be synced to drives.
		return s.writeAll(ctx, volume, pathJoin(path, xlStorageFormatFile), buf, ok, "")
	}

	ctx, cancel := context.WithCancel(t.Context())
	defer cancel()

	nDisks := 16
	erasureDisks, err := getRandomDisks(nDisks)
	if err != nil {
		t.Fatalf("Initialization of drives for Erasure setup: %s", err)
	}
	objLayer, _, err := initObjectLayer(ctx, mustGetPoolEndpoints(0, erasureDisks...))
	if err != nil {
		t.Fatalf("Initialization of object layer failed for Erasure setup: %s", err)
	}

// buffering writes to a network socket, excessive network writes should be
// avoided.
func TestWriterReadFromCounts(t *testing.T) {
	var w0 writeCountingDiscard
	b0 := NewWriterSize(&w0, 1234)
	b0.WriteString(strings.Repeat("x", 1000))
	if w0 != 0 {
		t.Fatalf("write 1000 'x's: got %d writes, want 0", w0)
	}
	b0.WriteString(strings.Repeat("x", 200))

				if sys.OpenIDConfig.ProviderEnabled() {
					sys.purgeExpiredCredentialsForExternalSSO(ctx)
				}
			}

			timer.Reset(waitInterval())
		case <-ctx.Done():
			return
		}
	}
}

// Prints IAM role ARNs.
func (sys *IAMSys) printIAMRoles() {
	if len(sys.rolesMap) == 0 {
		return
	}
	var arns []string
	for arn := range sys.rolesMap {
		arns = append(arns, arn.String())
	}