Hello, >>Before 2.4 it was possible that a crash of the OS, or sudden power
>>loss to the machine, could corrupt the index. But that's been fixed >>with 2.4. Did you mean that Lucene does not have this issue in 2.4.1? We are running the program that index some data ,and sometime we must shutdown Tomcat, and in some case the index corrupt.This is a probelm in our program,and our data is too huge and we can not run reindeing all data agian.We use Lucene 2.4.0 with Compass. Best Regards Khosro. >>The only known sources of corruption are hardware faults (bad RAM, bad >>disk, etc.), and, accidentally allowing 2 writers to write to the same >>index at once (this will very quickly cause corruption). Lucene's >>write lock normally prevents this from happening. >>kill -9, JRE crashing, OS crashing, power loss, etc., should not cause >>corruption for Lucene >= 2.4. >>Backing up is definitely a good idea -- Lucene's >>SnapshotDeletionPolicy makes it easy to do a hot backup (backup even >>though IndexWriter is still changing the index). There's a paper on >>this (NOTE: I'm the author!) available at >>http://www.manning.com/hatcher3/ that gives details (look for "Hot >>backups with Lucene (green paper - html)". Mike On Wed, Nov 25, 2009 at 10:37 AM, Max Lynch <ihas...@gmail.com> wrote: > On Wed, Nov 25, 2009 at 9:31 AM, Ian Lea <ian....@gmail.com> wrote: > >> > What are the typical scenarios when the index will go corrupt? >> >> Dodgy disks. >> > > I also have had index corruption on two occasions. It is not a big deal for > me since my data is fairly real time so the old documents aren't as > important. > > However, I'm running this on a VPS with slicehost, so whether or not they > use dodgy disks is not something I can confirm or even deal with. > > I do need to upgrade to 2.9 from 2.4, but I think one of the reasons for my > index corruption is deleting the index.write file rather than removing the > lock through the Lucene APIs. This seems like it could be a cause of > corruption, correct? > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org