I'd ask a different question, "why do you want to change the data dir in the first place?"...
Just askin' since it's possible you started down this path without really needing to. Why isn't the default place, a "data" directory under each core adequate? Best, Erick On Tue, Jul 14, 2015 at 1:13 PM, Shawn Heisey <apa...@elyograg.org> wrote: > On 7/14/2015 12:55 PM, Steven White wrote: >> Help me understand this. Are you saying this is >> https://wiki.apache.org/solr/SolrConfigXml#System_property_substitution how >> we should specify the "dataDir"? > > That wiki page shows what I think is a horrible example. It would be > completely unworkable if there's more than one core, because the value > of solr.data.dir is "/data/dir" which is an absolute path. With that > setting, if that dataDir element were present in all the solrconfig.xml > files, it would force all the cores to try and use the same absolute > dataDir. That would be a complete disaster. > > >> In that link, there is the statement "substituted can be put into a >> properties file" but it is not clear what this "properties file" is. Is it >> "solrcore.properties"? If so, where is that file and where should it be >> (assuming I must create it). Also, I looked at >> https://cwiki.apache.org/confluence/display/solr/Format+of+solr.xml and I >> cannot find an example of "dataDir". > > The URL you have included is a link to the Solr reference guide for the > next version of Solr (5.3 as of right now). You can't find dataDir in > relation to solr.xml because the new format of solr.xml (which is the > only format supported by Solr 5.x) doesn't specify cores. Only the OLD > solr.xml format, which Solr 4.10.x and earlier can use, lets you specify > dataDir. I strongly recommend using the new format. Here's some > documentation on the older format: > > https://wiki.apache.org/solr/Solr.xml%20%28supported%20through%204.x%29 > >> I also found this: >> https://wiki.apache.org/solr/Solr.xml%204.4%20and%20beyond but this link, >> while it talks about "dataDir" it does not show an example of how to >> specify it in solr.xml file. >> >> In my case, I'm on 5.2.1 a none cloud setup (just 1 core). I.e.: my setup >> is very similar to "\solr-5.2.1\example\example-DIH\solr". > > I am talking about specifying dataDir in the core.properties file, not > putting solr.data.dir in the solrcore.properties file. I actually have > never used solrcore.properties, so I really don't know where it goes. > Here is a snippet where I am sitting in my solr home and display one of > my core.properties files: > > root@idxb3:/index/solr4# cat ./cores/s0_0/core.properties > #Written by CorePropertiesLocator > #Sat May 02 16:11:54 MDT 2015 > name=s0build > dataDir=../../data/s0_0 > loadonStartup=false > transient=false > > Once you understand how everything fits together, and you know that my > solr home is /index/solr4, you will be able to see all the following > info in what I pasted above: This core's instanceDir is > /index/solr4/cores/s0_0. The name of the core is s0build. Its dataDir > (which in the properties file is a relative path -- relative to > instanceDir)is /index/solr4/data/s0_0. > > Here's another core.properties file. This core is named s0live, and > uses s0_1 in all the places where the previous file had s0_0: > > root@idxb3:/index/solr4# cat ./cores/s0_1/core.properties > #Written by CorePropertiesLocator > #Sat May 02 16:11:54 MDT 2015 > name=s0live > dataDir=../../data/s0_1 > loadonStartup=false > transient=false > > I hope you can make sense out of all this information. > > Thanks, > Shawn >
