Hier schreibt die `shutdown`-Eventhandler-Funktion eine Textzeile `"Application shutdown"` in eine Datei `log.txt`.

/// info | Info

In der Funktion `open()` bedeutet `mode="a"` „append“ („anhängen“), sodass die Zeile nach dem, was sich in dieser Datei befindet, hinzugefügt wird, ohne den vorherigen Inhalt zu überschreiben.

///

/// tip | Tipp

Thus if an existing object is over-written in MinIO, the corresponding document in the Elasticsearch index is updated. If an object is deleted, the corresponding document is deleted from the index.

When the _access_ format is used, MinIO appends events as documents in an Elasticsearch index. For each event, a document with the event details, with the timestamp of document set to the event's timestamp is appended to an index. The ID of the documented is randomly generated by Elasticsearch....

		t.Fatalf("Count should be 3, but got count: %v err %v", count10, err)
	}

	var count11 int64
	sameUsers := make([]*User, 0)
	for i := 0; i < 3; i++ {
		sameUsers = append(sameUsers, GetUser("count-4", Config{}))
	}
	DB.Create(sameUsers)

	if err := DB.Model(&User{}).Where("name = ?", "count-4").Group("name").Count(&count11).Error; err != nil || count11 != 1 {

			APICode: "kms:InternalError",
			Err:     "failed to list KMS APIs",
			Cause:   err,
		}
	}

	list := make([]madmin.KMSAPI, 0, len(APIs))
	for _, api := range APIs {
		list = append(list, madmin.KMSAPI{
			Method:  api.Method,
			Path:    api.Path,
			MaxBody: api.MaxBody,
			Timeout: int64(api.Timeout.Truncate(time.Second).Seconds()),
		})
	}
	return list, nil
}

		err = readDirectoryHeader(f, buf)
		if err == ErrFormat || err == io.ErrUnexpectedEOF {
			break
		}
		if err != nil {
			return err
		}
		f.headerOffset += r.baseOffset
		r.File = append(r.File, f)
	}
	if uint16(len(r.File)) != uint16(end.directoryRecords) { // only compare 16 bits here
		// Return the readDirectoryHeader error if we read
		// the wrong number of directory entries.
		return err
	}

Здесь функция-обработчик события `shutdown` запишет строку текста `"Application shutdown"` в файл `log.txt`.

/// info | Информация

В функции `open()` параметр `mode="a"` означает «добавление» (append), то есть строка будет добавлена в конец файла, без перезаписи предыдущего содержимого.

///

/// tip | Совет

		Bucket:          rs.Bucket,
		Object:          rs.Object,
		NumBuckets:      int64(rs.TotBuckets),
	}
	for b, st := range rs.BucketStatuses {
		if st == ResyncFailed {
			m.FailedBuckets = append(m.FailedBuckets, b)
		}
	}
	return &m
}

// save in-memory stats to disk
func (sm *siteResyncMetrics) save(ctx context.Context) {
	sTimer := time.NewTimer(siteResyncSaveInterval)
	defer sTimer.Stop()

	} else if results.RowsAffected != int64(len(users)) {
		t.Fatalf("rows affected expects: %v, got %v", len(users), results.RowsAffected)
	}

	var userIDs []uint
	for _, user := range users {
		userIDs = append(userIDs, user.ID)
		CheckUser(t, user, user)
	}

	var users2 []User

	if opts == nil {
		opts = &validateReplicationDestinationOptions{}
	}
	var arns []string
	if rCfg.RoleArn != "" {
		arns = append(arns, rCfg.RoleArn)
	} else {
		for _, rule := range rCfg.Rules {
			arns = append(arns, rule.Destination.String())
		}
	}
	var sameTarget bool
	for _, arnStr := range arns {
		arn, err := madmin.ParseARN(arnStr)
		if err != nil {

			sum  = make([]byte, 0, hash.Size())
		)
		for i := 0; i < hash.Size()*hash.BlockSize(); i += hash.Size() {
			hash.Write(msg)
			sum = hash.Sum(sum[:0])
			msg = append(msg, sum...)
			hash.Reset()
		}
		if !bytes.Equal(sum, checksum) {
			logger.Fatal(errSelfTestFailure, fmt.Sprintf("bitrot: %v selftest checksum mismatch: got %x - want %x", algorithm, sum, checksum))
		}
	}