Hani is suggesting embedding the time stamp in the file name, so that the file does not need to be opened/read. Instead, one could just look at the file name. It sounds like that would be more efficient indeed, and require one less file to be opened.
Otis --- Doug Cutting <[EMAIL PROTECTED]> wrote: > Maybe I'm misunderstanding your proposal, but the problem is that the > > resolution of file timestamps is not high enough. On MacOS, HFS > files > only have 1-second resoution, so one can't use a file's timestamp for > > versioning unless one is willing to wait a second when checking the > version, which slows lots of things down. So we're forced to either > (a) > use the timestamp to represent a version, rather than a time, or (b) > implement a version or timestamp of our own, contained in a file. > Perhaps there are other options... > > Doug > > Hani Suleiman wrote: > > Adding it inside of a file (segments or otherwise) would mean that > the > > file has to be opened to be read...I might be completely wrong > here, but > > wouldn't it be more efficient to have a separate timestamp file, eg > > > something called segments.[timestamp], with appropriate magic to > ensure > > it's atomically modified etc, and a filter to check for it? > > > > Doug Cutting wrote: > > > >> Christoph Goller wrote: > >> > >>> What about living the file timestamps as they are and using > >>> an additional file per index that contains nothing but a counter > >>> (type long) > >>> which gets incremented everytime the index is changed > (SegmentReader and > >>> IndexWriter). I could implement this. > >> > >> > >> > >> I think this is a good idea and would love to see an > implementation. > >> My guess is that you would do something like add a file called > >> "version" which contains nothing but this long. Alternately, you > >> could add the version at the end of the "segments" file or > something. > >> Then all of the IndexReader lastModified methods could be changed > to > >> return the value of the version rather than a date. For > >> back-compatibility, the version could in fact be the millisecond > time. > >> > >> Is that the sort of thing you're thinking of? > >> > >> Doug > >> > >> > >> > --------------------------------------------------------------------- > >> 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] > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
