It is technically doable since 2.9 with FileSwitchDirectory, where you can define file name endings as a filter to which underlying directory the requests go, see http://lucene.apache.org/java/2_9_1/api/core/org/apache/lucene/store/FileSwi tchDirectory.html
To have more directories, just use another FileSwitchDirectory as secondary and so on. ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Otis Gospodnetic [mailto:otis_gospodne...@yahoo.com] > Sent: Tuesday, November 24, 2009 11:32 PM > To: java-dev@lucene.apache.org > Subject: Distributing index over N disks > > Hello, > > Would it make sense and be possible to spread different index files over > multiple disks (without resorting to putting an index on a RAID)? > For example, what if the index files didn't live in a single index dir, > but were organized by their type in a snallow dir tree, like this: > > /path/to/index: > tis/<tis files here> > ftd/<fdt files here> > prx/<prx files here> > ... > > Then one could symlink these tis, fdt, prx, etc. dirs to locations that > are really on different disks. > Is this doable and would it help imrpve performance? I think it could > improve segment merging, index optimization, and searches, because N disk > heads would be able to do ~N times more work because of parallelization. > > > But the idea seems to simple that it makes me think I'm missing something, > otherwise it would have already been done. :) > > Otis > -- > Sematext is hiring -- http://sematext.com/about/jobs.html?mls > Lucene, Solr, Nutch, Katta, Hadoop, HBase, UIMA, NLP, NER, IR > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-dev-h...@lucene.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org For additional commands, e-mail: java-dev-h...@lucene.apache.org
