sitecore_master_index

#define parameters
$prefix = "sc9u2"
$PSScriptRoot = "C:resourcefiles"
$XConnectCollectionService = "$prefix.xconnect"
$sitecoreSiteName = "$prefix.sc"
$SolrUrl = "https://localhost:8984/solr"
$SolrRoot = "C:Solrsolr-6.6.2"
$SolrService = "Solr"
$SqlServer = "."
$SqlAdminUser = "sa"
$SqlAdminPassword= "saP4$$"

#install solr cores for xdb
$solrParams =
@{
    Path = "$PSScriptRootxconnect-solr.json"
    SolrUrl = $SolrUrl
    SolrRoot = $SolrRoot
    SolrService = $SolrService
    CorePrefix = $prefix
}

Install-SitecoreConfiguration @solrParams -Verbose

#install solr cores for sitecore $solrParams =
$solrParams = @{
    Path = "$PSScriptRootsitecore-solr.json"
    SolrUrl = $SolrUrl
    SolrRoot = $SolrRoot
    SolrService = $SolrService
    CorePrefix = $prefix
}

Install-SitecoreConfiguration @solrParams

<index id="sitecore_master_index" .....>
   <param desc="name">$(id)</param>
   <param desc="core">$(id)</param>

<index id="sitecore_master_index" .....>
   <param desc="name">$(id)</param>
   <param desc="core">instancename_$(id)</param>

<?xml version="1.0"?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/" xmlns:role="http://www.sitecore.net/xmlconfig/role/" xmlns:search="http://www.sitecore.net/xmlconfig/search/">
   <sitecore search:require="solr">
      <contentSearch>
         <configuration type="Sitecore.ContentSearch.ContentSearchConfiguration, Sitecore.ContentSearch">
            <indexes hint="list:AddIndex">
               <index id="sitecore_master_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_core_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_web_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_marketingdefinitions_master" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_marketingdefinitions_web" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_marketing_asset_index_master" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_marketing_asset_index_web" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_testing_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_suggested_test_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_fxm_master_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
               <index id="sitecore_fxm_web_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">
                  <param desc="core" patch:instead="param[@desc='core']">instancename_$(id)</param>
               </index>
            </indexes>
         </configuration>
      </contentSearch>
   </sitecore>
</configuration>