Hi Jason Thank you for the quick reply. This is exactly what I was looking for =D One more question tho, NumericRangeQuery says the class is equivalent to NumbericRangeFilter functionally. Is there any preference between the two?
thanks On Thu, Sep 22, 2011 at 10:29 AM, Sendros, Jason < jason.send...@verizonwireless.com> wrote: > Storing the date as a long and then searching with NumericRangeQuery will > provide you with exactly what you're looking for. This is an efficient > search solution for numeric data. > > Optimize() will reduce the size of your index and improve search time at > the cost of a large burst of overhead. Unless your searches are getting > noticeably slower or your index is expanding rapidly, you're better off > using IndexReader.reopen() for regular updates and optimize() occasionally. > > Note that when using IndexReader.reopen() you should close the original > IndexReader if it is still open to avoid memory leaks. > > Jason > > -----Original Message----- > From: Sam Jiang [mailto:sam.ji...@karoshealth.com] > Sent: Thursday, September 22, 2011 10:18 AM > To: java-user@lucene.apache.org > Subject: searching / sorting on timestamp and update efficiency > > Hi all > > I have some questions about how I should store timestamps. > > From my readings, I can see two ways of indexing timestamps: > DateTools (which uses formated timestamp strings) and > NumericUtils (which uses a long?). > > I'm not sure which one gives more performance in my scenario: > For each of my document, it needs to have an indexed millisecond resolution > timestamp. Almost all searches would be invoked with a range filter > (searching at hour resolution is sufficient). > There are usually 2-4 updates to this timestamp field for recently indexed > documents. And afterwards, updates to this field or any other fields are > rare. > > It would be great if somebody can advice me which format should I use. > p.s. should I be calling optimize() often given my frequent updates? > > thanks > > -- > Sam Jiang | karoshealth > (っﾟДﾟ；)っ hidden cat here > 7 Father David Bauer Drive, Suite 201 > Waterloo, ON, N2L 0A2, Canada > www.karoshealth.com > -- Sam Jiang | karoshealth (っﾟДﾟ；)っ hidden cat here 7 Father David Bauer Drive, Suite 201 Waterloo, ON, N2L 0A2, Canada www.karoshealth.com
