For a complete in-memory index, use Linux "tmpfs" as in-memory filesystem, and open the directory of this tmpfs with MMapDirectory.
----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Michael McCandless [mailto:luc...@mikemccandless.com] > Sent: Saturday, July 27, 2013 12:44 PM > To: Lucene Users > Subject: Re: Directly use inverted index > > You can create your own Codec and implement your own formats, e.g. > PostingsFormat controls how postings are encoded on disk. > > It's best to let the OS load the index into RAM ... as long as you have enough > free RAM, the OS will use it to cache all hot pages from the index. > > We do have a RAMDirectory but this is really best for tiny indices for testing > purposes: it's very GC heavy for large indices because it always uses 1 KB > byte[] to hold the files. > > Mike McCandless > > http://blog.mikemccandless.com > > > On Sat, Jul 27, 2013 at 4:04 AM, Airway Wong <airwayw...@gmail.com> > wrote: > > Hi, > > > > I would like to use Lucene's inverted index directly as building block > > for experimental purpose. > > > > 1. How can I customize the inverted list for different format? Is > > there any example? > > > > 2. Is there an easy way to force load the complete index into memory? > > > > Thanks in advance. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
