Question

我刚刚开始使用rrdtool来坚持有关家庭自动化的价值观。我写了一些样本来了解rdd的原理，但我恐怕没有得到它：

这就是我定义rrd数据库的方式：

<!-- Round Robin Database Dump -->
<rrd>
        <version>0003</version>
        <step>10</step> <!-- Seconds -->
        <lastupdate>1023654220</lastupdate> <!-- 2002-06-09 22:23:40 CEST -->

        <ds>
                <name> test</name>
                <type> GAUGE </type>
                <minimal_heartbeat>20</minimal_heartbeat>
                <min>0.000000000e+00</min>
                <max>5.000000000e+00</max>

                <!-- PDP Status -->
                <last_ds>5</last_ds>
                <value>0.000000000e+00</value>
                <unknown_sec> 0 </unknown_sec>
        </ds>

        <!-- Round Robin Archives -->
        <rra>
                <cf>AVERAGE</cf>
                <pdp_per_row>1</pdp_per_row> <!-- 10 seconds -->

                <params>
                <xff>5.000000000e-01</xff>
                </params>
                <cdp_prep>
                        <ds>
                        <primary_value>5.000000000e+00</primary_value>
                        <secondary_value>5.000000000e+00</secondary_value>
                        <value>NaN</value>
                        <unknown_datapoints>0</unknown_datapoints>
                        </ds>
                </cdp_prep>
                <database>
                        <!-- 2002-06-09 22:22:10 CEST / 1023654130 --> <row><v>NaN</v></row>
                        <!-- 2002-06-09 22:22:20 CEST / 1023654140 --> <row><v>NaN</v></row>
                        <!-- 2002-06-09 22:22:30 CEST / 1023654150 --> <row><v>NaN</v></row>
                        <!-- 2002-06-09 22:22:40 CEST / 1023654160 --> <row><v>NaN</v></row>
                        <!-- 2002-06-09 22:22:50 CEST / 1023654170 --> <row><v>3.000000000e+00</v></row>
                        <!-- 2002-06-09 22:23:00 CEST / 1023654180 --> <row><v>3.000000000e+00</v></row>
                        <!-- 2002-06-09 22:23:10 CEST / 1023654190 --> <row><v>4.000000000e+00</v></row>
                        <!-- 2002-06-09 22:23:20 CEST / 1023654200 --> <row><v>4.000000000e+00</v></row>
                        <!-- 2002-06-09 22:23:30 CEST / 1023654210 --> <row><v>5.000000000e+00</v></row>
                        <!-- 2002-06-09 22:23:40 CEST / 1023654220 --> <row><v>5.000000000e+00</v></row>
                </database>
        </rra>
</rrd>

这是我调用rddtool dump时的结果：

@hooks.register('register_rich_text_features')
def register_superscript_feature(features):
    feature_name = 'superscript'
    type_ = 'SUPERSCRIPT'
    tag = 'sup'

    # Configure how Draftail handles the feature in its toolbar.
    control = {
        'type': type_,
        'label': 'x²',
        'description': 'Superscript',
        'style': 'vertical-align: super',
    }

    # Call register_editor_plugin to register the configuration for Draftail.
    features.register_editor_plugin(
        'draftail', feature_name, draftail_features.InlineStyleFeature(control)
    )

    # Configure the content transform from the DB to the editor and back.
    db_conversion = {
        'from_database_format': {tag: InlineStyleElementHandler(type_)},
        'to_database_format': {'style_map': {type_: tag}},
    }

    # Call register_converter_rule to register the content transformation conversion.
    features.register_converter_rule('contentstate', feature_name, db_conversion)

任何人都可以解释原因：

1）时间戳1023654121的存储值不见了？
2）时间戳1023654160的存储值不见了？

在理解rrd原理时我错过了什么？在哪里可以找到关于这些主题的解释？

非常感谢！
卡斯滕

rrdtool-理解中的问题

0 个答案: