solrcloud--core.properties

solrclound的core.properties可配置属性：

• name - the name of the core required，core的名称
• config - the configuration file. Defaults to solrconfig.xml，配置文件名称，默认是conf文件夹下的solrconfig.xml
• dataDir - the directory where the index, tlog, etc. are stored. Again, since this is discovery-based, omit this unless you have special needs，索引文件的存储位置
• ulogDir - where the transaction log resides. It may be advantageous to put the transaction lot on a different disk than the index，事务日志的存储日志
• schema - the schema file. Defaults to schema.xml，schema文件配置，默认是conf文件夹的schema.xml
• shard - the shard ID，shard的名称
• collection - the collection to which this core belongs，这个core所属的solrcloud的collection

• roles - SolrCloud role definition，solrcloud的角色，有可能是hdfs存储等

• properties - properties file to override core definitions，重新定义properties文件位置，以该文件为优先
• loadOnStartup - [true|false] this core should be loaded and a searcher opened when Solr starts，没用到过，就不误人子弟了
• transient - [true|false] this core may be unloaded if the core cache exceeds transientCacheSize (defined in solr.propreties)，没用到过，就不误人子弟了

• coreNodeName - SolrCloud core node name，该core节点的名称，貌似在迁移索引啥的时候可以用到

•  4.6  configName - tentative a name (expected to be in <SOLR_HOME>/configs that contains all of the configuration files (schema.xml, solrconfig.xml and all supporting files e.g. synonyms.txt). Multiple collections can use the same set of configuration files，4.6版本之后有效，几个collection可以共用一个配置，这个配置应该是zookeeper节点下的collection