Wait, on the page you referenced there's this which appears to be exactly what you want:
<mergePolicyFactory class="org.apache.solr.index.SortingMergePolicyFactory"> <str name="sort">timestamp desc</str> <str name="wrapped.prefix">inner</str> <str name="inner.class">org.apache.solr.index.TieredMergePolicyFactory</str> <int name="inner.maxMergeAtOnce">10</int> <int name="inner.segmentsPerTier">10</int> </mergePolicyFactory> And since this is in solrconfig.xml which is defined per core you can specify whatever you want for each core. Also see SOLR-5730 and SOLR-8621 Best, Erick On Mon, Nov 28, 2016 at 1:47 PM, Dorian Hoxha <dorian.ho...@gmail.com> wrote: > bump after 11 days > > On Thu, Nov 17, 2016 at 10:25 AM, Dorian Hoxha <dorian.ho...@gmail.com> > wrote: > >> Hi, >> >> I know this is done in lucene, but I don't see it in solr (by searching + >> docs on collections). >> >> I see https://cwiki.apache.org/confluence/display/solr/ >> IndexConfig+in+SolrConfig but it's not mentioned for index-time-sorting. >> >> So, is it possible and definable for each index ? I want to have some >> sorted by 'x' field, some by 'y' field, and some staying as default. >> >> Thank You >>