ttfbDistribution    = "seconds_distribution"
	ttlbDistribution    = "ttlb_seconds_distribution"

	lastActivityTime = "last_activity_nano_seconds"
	startTime        = "starttime_seconds"
	upTime           = "uptime_seconds"
	memory           = "resident_memory_bytes"
	vmemory          = "virtual_memory_bytes"
	cpu              = "cpu_total_seconds"

| `start_time_seconds`          | `gauge`   | Start time for MinIO process in seconds since Unix epoc                                                        | `server` |
| `uptime_seconds`              | `gauge`   | Uptime for MinIO process in seconds                                                                            | `server` |

| `minio_cluster_replication_link_offline_duration_seconds`  | Total duration of replication link being offline in seconds since last offline event                     |
| `minio_cluster_replication_link_downtime_duration_seconds` | Total downtime of replication link in seconds since server start                                         |

	var (
		// We check every 15 seconds if the disk is writable and we can read back.
		checkEvery = 15 * time.Second

		// If the disk has completed an operation successfully within last 5 seconds, don't check it.
		skipIfSuccessBefore = 5 * time.Second
	)

	// if disk max timeout is smaller than checkEvery window
	// reduce checks by a second.
	if globalDriveConfig.GetMaxTimeout() <= checkEvery {

			refreshStart := time.Now()
			if err := sys.Load(ctx, false); err != nil {
				iamLogIf(ctx, fmt.Errorf("Failure in periodic refresh for IAM (took %.2fs): %v", time.Since(refreshStart).Seconds(), err), logger.WarningKind)
			} else {
				took := time.Since(refreshStart).Seconds()
				if took > maxDurationSecondsForLog {
					// Log if we took a lot of time to load.
					logger.Info("IAM refresh took %.2fs", took)
				}
			}

	if result.Error != nil {
		return RemoteTargetConnectionErr{Bucket: tgt.TargetBucket, Err: result.Error, AccessKey: tgt.Credentials.AccessKey}
	}
	if !result.Online {
		err := errors.New("Health check timed out after 3 seconds")
		return RemoteTargetConnectionErr{Err: err}
	}

	sys.Lock()
	defer sys.Unlock()

	tgts := sys.targetsMap[bucket]
	newtgts := make([]madmin.BucketTarget, len(tgts))
	found := false

		HTTPStatusCode: http.StatusNotFound,
	},
	ErrMaximumExpires: {
		Code:           "AuthorizationQueryParametersError",
		Description:    "X-Amz-Expires must be less than a week (in seconds); that is, the given X-Amz-Expires must be less than 604800 seconds",
		HTTPStatusCode: http.StatusBadRequest,
	},

	// Generic Invalid-Request error. Should be used for response errors only for unlikely

		memCache:          "Cache memory on the node",
		memAvailable:      "Available memory on the node",
		readsPerSec:       "Reads per second on a drive",
		writesPerSec:      "Writes per second on a drive",
		readsKBPerSec:     "Kilobytes read per second on a drive",
		writesKBPerSec:    "Kilobytes written per second on a drive",
		readsAwait:        "Average time for read requests to be served on a drive",

		c.done = nil
	}
	return c.rc.Close()
}

// keepHTTPReqResponseAlive can be used to avoid timeouts with long storage
// operations, such as bitrot verification or data usage scanning.
// Every 10 seconds a space character is sent.
// keepHTTPReqResponseAlive will wait for the returned body to be read before starting the ticker.
// The returned function should always be called to release resources.

	"github.com/minio/minio/internal/mcontext"
	xnet "github.com/minio/pkg/v2/net"
)

const logSubsys = "internodes"

// DefaultTimeout - default REST timeout is 10 seconds.
const DefaultTimeout = 10 * time.Second

const (
	offline = iota
	online
	closed
)

// NetworkError - error type in case of errors related to http/transport