@Mike. Thanks for the reply. But I had thought that write.lock is there to prevent multiple additions/updates/deleteDocuments.
Has there been a change recently in this regard ? Thanks Ajay Garg Michael McCandless-2 wrote: > > > That's right. > > Each thread can enter IndexWriter.add/update/deleteDocument(s) in > parallel. There are some parts inside IndexWriter that are > synchronized but they are kept to a minimum to keep good thread > concurrency. As you add threads it's best to increase the RAM buffer > at the same time to get better performance. > > Mike > > ajay_garg wrote: > >> >> @Yonik >> >> So you mean to say, that if two threads have the same instance of an >> IndexWriter passed to both of them, and both these threads run on two >> different CPUs, then they can write to the index at the same time ? >> >> >> >> Yonik Seeley wrote: >>> >>> On Jan 30, 2008 10:59 PM, ajay_garg >>> <[EMAIL PROTECTED]> wrote: >>>> >>>> Thanks Mike for your directions. >>>> >>>> Yes, I am in fact using a single computer for my application, and >>>> your >>>> saying that in this case, multiple threads with a single >>>> IndexWriter wll >>>> give a better performance. Hmmm. I just wonder that since each >>>> IndexWriter >>>> has a single write.lock, this means that sitting on the CPU, we >>>> observe >>>> that >>>> at a particular instant, only a single thread is using the CPU, >>> >>> The write.lock is to protect against other IndexWriter instances, >>> *not* against other threads. >>> Using multiple threads on a single IndexWriter should utilize >>> multiple >>> CPUs. >>> >>> -Yonik >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: [EMAIL PROTECTED] >>> For additional commands, e-mail: [EMAIL PROTECTED] >>> >>> >>> >> >> -- >> View this message in context: http://www.nabble.com/Query-in- >> Lucene-2.3.0-tp15175141p15198783.html >> Sent from the Lucene - Java Users mailing list archive at Nabble.com. >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/Query-in-Lucene-2.3.0-tp15175141p15221338.html Sent from the Lucene - Java Users mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
