HBase保存的各个字段意义解释

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Author：xxx0624

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nutch2.2.1集成HBase0.94.25, 可以查询nutch的conf文件中的gora-hbase-mapping.xml查看原文件

<gora-orm>

    <table name="webpage">
        <family name="p" maxVersions=""/> <!-- This can also have params like compression, bloom filters -->
        <family name="f" maxVersions=""/>
        <family name="s" maxVersions=""/>
        <family name="il" maxVersions=""/>
        <family name="ol" maxVersions=""/>
        <family name="h" maxVersions=""/>
        <family name="mtdt" maxVersions=""/>
        <family name="mk" maxVersions=""/>
    </table>
//name表示各个table的family.
//比如: f表示下载, s表示评分, il表示链入地址, ol链出地址 & etc...

    <class table="webpage" keyClass="java.lang.String" name="org.apache.nutch.storage.WebPage">

        <!-- fetch fields                                       -->
        <field name="baseUrl" family="f" qualifier="bas"/>//源地址
        <field name="status" family="f" qualifier="st"/>
        <field name="prevFetchTime" family="f" qualifier="pts"/>
        <field name="fetchTime" family="f" qualifier="ts"/>//下载时间
        <field name="fetchInterval" family="f" qualifier="fi"/>
        <field name="retriesSinceFetch" family="f" qualifier="rsf"/>
        <field name="reprUrl" family="f" qualifier="rpr"/>
        <field name="content" family="f" qualifier="cnt"/>//下载的内容
        <field name="contentType" family="f" qualifier="typ"/>//下载的type
        <field name="protocolStatus" family="f" qualifier="prot"/>
        <field name="modifiedTime" family="f" qualifier="mod"/>
        <field name="prevModifiedTime" family="f" qualifier="pmod"/>
        <field name="batchId" family="f" qualifier="bid"/>

        <!-- parse fields                                       -->
        <field name="title" family="p" qualifier="t"/>//内容标题
        <field name="text" family="p" qualifier="c"/>
        <field name="parseStatus" family="p" qualifier="st"/>
        <field name="signature" family="p" qualifier="sig"/>
        <field name="prevSignature" family="p" qualifier="psig"/>

        <!-- score fields                                       -->
        <field name="score" family="s" qualifier="s"/>
        <field name="headers" family="h"/>
        <field name="inlinks" family="il"/>//链入地址
        <field name="outlinks" family="ol"/>//链出地址
        <field name="metadata" family="mtdt"/>
        <field name="markers" family="mk"/>
    </class>

    <table name="host">
      <family name="mtdt" maxVersions=""/>
      <family name="il" maxVersions=""/>
      <family name="ol" maxVersions=""/>
    </table>

    <class table="host" keyClass="java.lang.String" name="org.apache.nutch.storage.Host">
      <field name="metadata" family="mtdt"/>
      <field name="inlinks" family="il"/>
      <field name="outlinks" family="ol"/>
    </class>

</gora-orm>