首页 \ 问答 \ 如何使用Solr 5.5中的旧版本的schema.xml重建主从多核(How to rebuild master-slave multi-core with schema.xml from old verison in Solr 5.5)

如何使用Solr 5.5中的旧版本的schema.xml重建主从多核(How to rebuild master-slave multi-core with schema.xml from old verison in Solr 5.5)

 我在1个主服务器上构建了2个内核，在旧版本的Solr中构建了2个从服务器。 主服务器和从服务器都使用solrcore.properties来指示其角色。 例如对于奴隶（注意：对于主人，我只是反转真/假），它是：  
enable.master=false
enable.slave=true
#define master url
MASTER_CORE_URL=192.168.1.222:8983/corea_SE
POLL_TIME=00:00:60
 
 在solrconfig.xml中，我定义了角色详细信息，例如：  
<requestHandler name="/replication" class="solr.ReplicationHandler" >
    <!-- Use solrcore.properties to switch the role for node -->
    <lst name="master">
       <str name="enable">${enable.master:false}</str>
       <str name="replicateAfter">startup</str>
       <str name="replicateAfter">commit</str>
       <str name="confFiles">schema.xml,stopwords.txt</str>
    </lst>
    <lst name="slave">
        <str name="enable">${enable.slave:false}</str>
        <str name="masterUrl">http://${MASTER_CORE_URL}/${solr.core.name}/replication</str>
        <str name="pollInterval">${POLL_TIME}</str>
     </lst>
</requestHandler>
 
 我想在Solr 5.5中重建这个结构，但我在Solr 5.5下载包或Apache Solr参考指南中都没有找到这样的示例或说明。 Solr 5.5甚至没有schema.xml或master-slave的任何示例。 我怎样才能做到这一点？ 有没有可以帮助我的文件或网址？ 

I've built 2 cores with schema.xml on 1 master and 2 slaves in old-version Solr. Both master and slave use solrcore.properties to indicate their roles. e.g. for slave (note:for master, I just reverse the true/false), it's: 
enable.master=false
enable.slave=true
#define master url
MASTER_CORE_URL=192.168.1.222:8983/corea_SE
POLL_TIME=00:00:60
 
and in solrconfig.xml, I define the roles detail, e.g: 
<requestHandler name="/replication" class="solr.ReplicationHandler" >
    <!-- Use solrcore.properties to switch the role for node -->
    <lst name="master">
       <str name="enable">${enable.master:false}</str>
       <str name="replicateAfter">startup</str>
       <str name="replicateAfter">commit</str>
       <str name="confFiles">schema.xml,stopwords.txt</str>
    </lst>
    <lst name="slave">
        <str name="enable">${enable.slave:false}</str>
        <str name="masterUrl">http://${MASTER_CORE_URL}/${solr.core.name}/replication</str>
        <str name="pollInterval">${POLL_TIME}</str>
     </lst>
</requestHandler>
 
I want to rebuild this construction in Solr 5.5 but I find no such example or instructions in either Solr 5.5 download pack or Apache Solr Reference Guide. Solr 5.5 doesn't even have any examples with schema.xml or master-slave. How can I do this? Is there any doc or url that can help me?

原文：https://stackoverflow.com/questions/36254855

更新时间：2023-07-17 16:07

最满意答案

 QAbstractItemModel::rowCount和QAbstractItemModel::columnCount的接口允许视图向模型询问顶级行/列的数量，以及询问特定节点具有的子节点数。 前者通过传入无效 parent节点来完成，而后者通过传递特定节点的QModelIndex作为parent节点来完成。  
 即使视图传递了有效的parent （即它要求另一个节点的子节点数），您的TableModel::rowCount的实现总是返回1 。 由于这应该是一个“表”模型（不是树模型），您应该更改rowCount和columnCount ，如下所示：  
class TableModel : public QAbstractTableModel {
    // .....
    int rowCount(const QModelIndex &parent) const override {
        if(parent.isValid()) return 0; //no children
        return 1;
    }
    int columnCount(const QModelIndex &parent) const override {
        if(parent.isValid()) return 0; //no children
        return 2;
    }
    //....
}
 
 ModelTest通过从模型中获取根索引（0,0）的第一个子 QModelIndex ，然后向该子项询问其父 ModelTest来检测此类错误。 报告的父级应该等于根索引（显然，这在您的代码中失败，因为您没有维护任何这些关系）... 

QAbstractItemModel::rowCount and QAbstractItemModel::columnCount's interface allows the view to ask the model for the number of top-level rows/columns as well as asking for the number of children a specific node has. The former is done by passing in an invalid parent, while the latter is done by passing the specific node's QModelIndex as the parent parameter. 
Your TableModel::rowCount's implementation always returns 1 even when the view passes a valid parent (i.e. It is asking for the number of the children of another node). Since this is supposed to be a "Table" model (not a tree model), You should change your rowCount and columnCount as follows: 
class TableModel : public QAbstractTableModel {
    // .....
    int rowCount(const QModelIndex &parent) const override {
        if(parent.isValid()) return 0; //no children
        return 1;
    }
    int columnCount(const QModelIndex &parent) const override {
        if(parent.isValid()) return 0; //no children
        return 2;
    }
    //....
}
 
ModelTest detects such mistakes by getting the first child QModelIndex for the root index (0,0) from your model and then asking this child about its parent. The reported parent should equal the root index (obviously, this fails in your code since you are not maintaining any of these relationships)...

如何使用Solr 5.5中的旧版本的schema.xml重建主从多核(How to rebuild master-slave multi-core with schema.xml from old verison in Solr 5.5)

最满意答案

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