On 3/3/2016 4:12 AM, Tom Evans wrote: > I'm struggling to configure solr cloud to put the index files and > core.properties in the correct places in SolrCloud 5.5. Let me explain > what I am trying to achieve: > > * solr is installed in /opt/solr > * the user who runs solr only has read only access to that tree > * the solr home files - custom libraries, log4j.properties, solr.in.sh > and solr.xml - live in /data/project/solr/releases/<revision>, which > is then the target of a symlink /data/project/solr/releases/current > * releasing a new version of the solr home (eg adding/changing > libraries, changing logging options) is done by checking out a fresh > copy of the solr home, switching the symlink and restarting solr > * the solr core.properties and any data live in /data/project/indexes, > so they are preserved when new solr home is released > > Setting core specific dataDir with absolute paths in solrconfig.xml > only gets me part of the way, as the core.properties for each shard is > created inside the solr home. > > This is obviously no good, as when releasing a new version of the solr > home, they will no longer be in the current solr home.\
Add the coreRootDirectory config element to your solr.xml file, so Solr does core discovery directly on /data/project/indexes, rather than the solr home. The solr.xml and lib directory with your jars will remain in the solr home. https://cwiki.apache.org/confluence/display/solr/Format+of+solr.xml#Formatofsolr.xml-Solr.xmlParameters Because it's easy to end up with different cores sharing a data directory, changing dataDir should be avoided unless you have good reason, especially in solrconfig.xml, and absolute paths are a particularly bad idea. If you leave dataDir alone, then both instanceDir and dataDir for each core will be in subdirectories under /data/project/indexes. As you probably know, SolrCloud does not use the conf directory in the core's instanceDir, so aside from properties files (like core.properties) data is the only information you will have for each core -- there's no need to have it in a different location than instanceDir, which is where core.properties lives. I'm going against the advice I've given you in my own config and setting dataDir in my core.properties files, but it's a relative path, so if I move things around, the data moves too. I'm also very aware of what's in *every* core.properties file, and take care to ensure that they are all correct. I am not running SolrCloud, so each of my cores contains a conf directory. If moving dataDir outside of instanceDir is important to you, set it in core.properties, and use a relative path. When using a relative path, dataDir is relative to instanceDir. It defaults to ${instanceDir}/data. Thanks, Shawn
