percUtil       MetricName = "perc_util"
	usedInodes     MetricName = "used_inodes"

	// network stats
	interfaceRxBytes  MetricName = "rx_bytes"
	interfaceRxErrors MetricName = "rx_errors"
	interfaceTxBytes  MetricName = "tx_bytes"
	interfaceTxErrors MetricName = "tx_errors"

	// cpu stats
	cpuUser       MetricName = "user"
	cpuSystem     MetricName = "system"
	cpuIOWait     MetricName = "iowait"

     */
    private static byte[] buildPacket(byte[] header, byte[] body, Integer ctxOffsetFromHeader, byte[] ctxBytes) {
        int totalLen;
        if (ctxOffsetFromHeader != null && ctxBytes != null) {
            totalLen = Math.max(SMB2_HEADER_LENGTH + body.length, ctxOffsetFromHeader + ctxBytes.length);
        } else {
            totalLen = SMB2_HEADER_LENGTH + body.length;
        }

	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	tgtBytes, err := json.Marshal(&targets)
	if err != nil {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrAdminConfigBadJSON, err), r.URL)
		return
	}
	if _, err = globalBucketMetadataSys.Update(ctx, bucket, bucketTargetsFile, tgtBytes); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

        HandleGuid guid2 = new HandleGuid();
        
        assertNotEquals(guid1, guid2);
        assertEquals(16, guid1.toBytes().length);
        
        // Test round-trip
        HandleGuid guid3 = new HandleGuid(guid1.toBytes());
        assertEquals(guid1, guid3);
    }
    
    @Test
    public void testHandleInfoExpiration() {
        HandleInfo info = new HandleInfo(

	if err != nil {
		writeErrorResponseJSON(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	tgtBytes, err := json.Marshal(&targets)
	if err != nil {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrAdminConfigBadJSON, err), r.URL)
		return
	}
	if _, err = globalBucketMetadataSys.Update(ctx, bucket, bucketTargetsFile, tgtBytes); err != nil {
		writeErrorResponseJSON(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	x := []byte{'x'}
	y := []byte{'y'}
	tmp := make([]byte, 72)
	for _, growLen := range []int{0, 100, 1000, 10000, 100000} {
		for _, startLen := range []int{0, 100, 1000, 10000, 100000} {
			xBytes := Repeat(x, startLen)

			buf := NewBuffer(xBytes)
			// If we read, this affects buf.off, which is good to test.
			readBytes, _ := buf.Read(tmp)
			yBytes := Repeat(y, growLen)
			allocs := testing.AllocsPerRun(100, func() {