Hi, For our project purposes, we need to store Solr collections on HDFS. While exploring the documentation for the same, I have found lucidworks documentation ( https://doc.lucidworks.com/lucidworks-hdpsearch/3.0.0/Guide-Install-Manual.html#hdfs-specific-changes) , where it has been mentioned that solr start script can be passed many arguments while starting. The example provided is as below:
bin/solr start -c -z 10.0.0.1:2181,10.0.0.2:2181,10.0.0.3:2181/solr -Dsolr.directoryFactory=HdfsDirectoryFactory -Dsolr.lock.type=hdfs -Dsolr.hdfs.home=hdfs://sandbox.hortonworks.com:8020/user/solr What does this actually mean when passing directoryFactory settings for Solr start script? I was thinking Directory Factory setting is something that apply only at each collection level i.e. we need to specify within the solrconfig.xml file *only*. When the above settings are passed as part of start script, does that mean whenever a new collection is created, Solr is going to store the indexes in HDFS? But what if I upload my solrconfig.xml to ZK which contradicts with this and contains NRTDirectoryFactory setting? Given the above start script, should / could I skip the directory factory setting section in my solrconfig.xml with the assumption that the collections are going to be stored on HDFS *by default*? This is confusing to me and hence need the expert advice of the community. Thanks
