Thanks Shawn and Erick. We are planning to migrate the data in two of the largest collections to another hard disk, while the rest of the collections remains at the default one for the main core. So there are already data indexed in the collections. Will this method work, or we have to create a new collection, edit the core.properties files, then transfer the index files to this new collection?
Regards, Edwin On 12 July 2017 at 23:07, Erick Erickson <erickerick...@gmail.com> wrote: > Shawn's way will work, of course you have to be sure you didn't index > any data before editing all the core.properties files. > > There's another way to set the dataDir per core though that has the > advantage of not entailing any down time or hand editing files: > > create the collection with createNodeSet=EMPTY. No replicas are created > > Now add each replica with ADDREPLICA. In addition to all the regular > params, use property.dataDir=place_you_want_the_index > > The ADDREPLICA property.blah param is intended exactly to set > arbitrary properties in core.properties for the replica... > > Best, > Erick > > On Wed, Jul 12, 2017 at 6:24 AM, Shawn Heisey <apa...@elyograg.org> wrote: > > On 7/12/2017 12:38 AM, Zheng Lin Edwin Yeo wrote: > >> I found that we can set the path under <dataDir> in solrconfig.xml > >> > >> However, this seems to work only if there is one replica. How do we set > it > >> if we have 2 or more replica? > > > > Setting dataDir in solrconfig.xml is something that really only works in > > standalone Solr. For SolrCloud, this method has issues that are > > difficult to get around. > > > > Another option that works in ANY Solr mode is changing dataDir in the > > core.properties file that every core uses. Create the collection, > > allowing Solr to create the cores in the default way. Shut down Solr > > and edit the core.properties file for each core that you want to have > > the data in a different location. Add a dataDir property pointing at > > the new location for that core's data. If the core actually has any > > contents, you can move the data to that location, but if not, you can > > simply let Solr create the data itself when it starts back up. > > > > The core.properties file is in Java properties format, which is well > > documented in multiple places around the Internet. > > > > https://www.google.com/search?q=java+properties+format&ie=utf-8&oe=utf-8 > > > > If the dataDir location is not an absolute path, then it will be > > relative to the instanceDir -- the place where core.properties is. The > > dataDir value defaults to a simple value of "data". > > > > Thanks, > > Shawn > > >
