gotcha, thanks, Mike On Sun, Dec 13, 2009 at 7:28 PM, Michael McCandless < luc...@mikemccandless.com> wrote:
> IndexWriter is transactional: if you do the deletes & adds during a > single IndexWriter session (ie, no commit in between), then simply > call IndexWriter.rollback to get back to your starting index, if > anything goes wrong. If nothing goes wrong, call IndexWriter.commit. > > Outside readers, even newly opened ones, will see either the starting > state, or the finished state, and nothing in between. > > Mike > > On Sat, Dec 12, 2009 at 10:24 PM, Weiwei Wang <ww.wang...@gmail.com> > wrote: > > What I'm doing now is to indexing all file paths in a bunch of ftp > servers. > > > > For ftp server administrator, he can add, delete or rename the files. So > as > > to keep pace with times, i need to do updating very often. > > > > the process should be: > > 1. delete the old documents > > 2. add the new crawled ones > > 3. if error happend in process 2, rollback is performed > > 4. finish > > > > I used two indexed mainly to do rollback, otherwise the logic may be > > confused and not very clear. > > > > > > Currently, i'm thinking how to do this job with only one copy of index. > > > > > > On Sun, Dec 13, 2009 at 11:18 AM, Erick Erickson < > erickerick...@gmail.com>wrote: > > > >> Quick addition. Even if you commit/close your indexwriter, you > >> *still* won't see the changes in your search unless you repoen the > >> indexreader. But you have to do both (in the order above) to > >> see all the changes you've added via your indexwriter..... > >> > >> but there's no reason to hold off on committing changes in > >> your indexwriter for a long time and risk losing the changes > >> should your program abort..... > >> > >> HTH > >> Erick > >> > >> On Sat, Dec 12, 2009 at 9:08 AM, Weiwei Wang <ww.wang...@gmail.com> > wrote: > >> > >> > Gotcha, tThanks, Uwe > >> > > >> > 2009/12/12 Uwe Schindler <u...@thetaphi.de> > >> > > >> > > No. As long as you not commit or close the IndexWriter and reopen > the > >> > > IndexReader on the search side, nothing happens on the search side. > >> > > > >> > > Copying like you do is absolutely not needed. > >> > > > >> > > ----- > >> > > Uwe Schindler > >> > > H.-H.-Meier-Allee 63, D-28213 Bremen > >> > > http://www.thetaphi.de > >> > > eMail: u...@thetaphi.de > >> > > > >> > > > -----Original Message----- > >> > > > From: Weiwei Wang [mailto:ww.wang...@gmail.com] > >> > > > Sent: Saturday, December 12, 2009 1:25 PM > >> > > > To: java-user@lucene.apache.org > >> > > > Subject: Index Update > >> > > > > >> > > > Hi, all, > >> > > > I need to update my index everyday so as to keep pace with > >> times. > >> > > > Current I have two copy of indexes, one is used to provide search > >> > > service, > >> > > > the other is used to do updating. Once the updating process is > done, > >> I > >> > > > write > >> > > > all the updated documents to the index which provide search > service. > >> > > > > >> > > > I want to use only one copy of index, and do updating searching > on > >> the > >> > > > same > >> > > > index? Does the updating process will effect the search result > when > >> the > >> > > > updating process is running? > >> > > > > >> > > > -- > >> > > > Weiwei Wang > >> > > > Alex Wang > >> > > > 王巍巍 > >> > > > Room 403, Mengmin Wei Building > >> > > > Computer Science Department > >> > > > Gulou Campus of Nanjing University > >> > > > Nanjing, P.R.China, 210093 > >> > > > > >> > > > Homepage: http://cs.nju.edu.cn/rl/weiweiwang > >> > > > >> > > > >> > > > --------------------------------------------------------------------- > >> > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > >> > > For additional commands, e-mail: java-user-h...@lucene.apache.org > >> > > > >> > > > >> > > >> > > >> > -- > >> > Weiwei Wang > >> > Alex Wang > >> > 王巍巍 > >> > Room 403, Mengmin Wei Building > >> > Computer Science Department > >> > Gulou Campus of Nanjing University > >> > Nanjing, P.R.China, 210093 > >> > > >> > Homepage: http://cs.nju.edu.cn/rl/weiweiwang > >> > > >> > > > > > > > > -- > > Weiwei Wang > > Alex Wang > > 王巍巍 > > Room 403, Mengmin Wei Building > > Computer Science Department > > Gulou Campus of Nanjing University > > Nanjing, P.R.China, 210093 > > > > Homepage: http://cs.nju.edu.cn/rl/weiweiwang > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > > -- Weiwei Wang Alex Wang 王巍巍 Room 403, Mengmin Wei Building Computer Science Department Gulou Campus of Nanjing University Nanjing, P.R.China, 210093 Homepage: http://cs.nju.edu.cn/rl/weiweiwang
