Solr is an application that uses the Lucene Java library -- everything that exists in Lucene exists in Solr, Solr just adds on top of it, the raw Lucene index is in the data directory, Lucene's (minimal) caching is still used, additional Solr specific caching is added on top (see the wiki for more info)
BTW: If you have more questions please start a new thread... : Subject: help on caching and index files of Solr : In-Reply-To: <[EMAIL PROTECTED]> http://people.apache.org/~hossman/#threadhijack Thread Hijacking on Mailing Lists When starting a new discussion on a mailing list, please do not reply to an existing message, instead start a fresh email. Even if you change the subject line of your email, other mail headers still track which thread you replied to and your question is "hidden" in that thread and gets less attention. It makes following discussions in the mailing list archives particularly difficult. See Also: http://en.wikipedia.org/wiki/Thread_hijacking -Hoss