We are working on the Solr trunk ....and have a Master and Two slaves configuration ..... Our indexing consists of Periodic Full and Incremental index building on the master and replication on the slaves.
When a Full indexing (clean rebuilt) is performed, we always end with an extra index folder copy, which holds the complete index and hence the size just grows on, on the slaves. drwxr-xr-x 2 tomcat tomcat 4096 2010-10-09 12:10 index drwxr-xr-x 2 tomcat tomcat 4096 2010-10-11 09:43 index.20101009120649 drwxr-xr-x 2 tomcat tomcat 4096 2010-10-12 10:27 index.20101011094043 -rw-r--r-- 1 tomcat tomcat 75 2010-10-11 09:43 index.properties -rw-r--r-- 1 tomcat tomcat 422 2010-10-12 10:26 replication.properties drwxr-xr-x 2 tomcat tomcat 68 2010-10-12 10:27 spellchecker Where index.20101011094043 is the active index and the other index.xxx directories are no more used. The SnapPuller deletes the temporary Index directory, but does not delete the old one when the switch is performed. The below code should do the trick. boolean fetchLatestIndex(SolrCore core) throws IOException { .......... } finally { if(deleteTmpIdxDir) { delTree(tmpIndexDir); } else { * // Delete the old index directory delTree(indexDir);* } } ......... } Any suggestions ??