Yes, very significant ones. Also memory usage is vastly improved. On Fri, Jul 17, 2015 at 11:31 AM, Shuangyang Yang <sy...@linkedin.com.invalid> wrote: > Erick, > > Thank you very much. Is there any performance comparison between these two > versions? Is there any data on the performance? > > Thank you very much > Best Regards > --- > Shuangyang Yang > > linkedin.com/in/everyoung <www.linkedin.com/in/everyoung> > > > > > On 7/17/15, 10:06 AM, "Erick Erickson" <erickerick...@gmail.com> wrote: > >>Please look at the CHANGES.txt file for Solr and/or Lucene, >>there's a "New Features" section for every release. >> >>Best, >>Erick >> >>On Fri, Jul 17, 2015 at 7:55 AM, Shuangyang Yang >><sy...@linkedin.com.invalid> wrote: >>> Erick, Amish, >>> >>> Thank you very much for your reply. They are really helpful. Can you >>>tell >>> me what are the compelling features from 2.9.1 to 5.X? I¹m sure there >>>are >>> many. >>> >>> Thank you very much >>> Best Regards >>> --- >>> Shuangyang Yang >>> >>> linkedin.com/in/everyoung <www.linkedin.com/in/everyoung> >>> >>> >>> >>> >>> On 7/16/15, 8:41 PM, "Erick Erickson" <erickerick...@gmail.com> wrote: >>> >>>>You have two real choices here: >>>>1> reindex your corpus under 5x >>>>2> follow a tortuous upgrade path. Solr/Lucene only promise to >>>>be backwards compatible through one major version. Thus >>>>Lucene 3x can read Lucene 2x. But Lucene 4x cannot read >>>>read Lucene 2x. >>>> >>>>So you'd have to go 2x->3x->4x->5x with chances for mis-steps >>>>all along the way. >>>> >>>>Best, >>>>Erick >>>> >>>>On Thu, Jul 16, 2015 at 8:27 PM, Shah, Amish <amish.s...@intel.com> >>>>wrote: >>>>> No, the file format is not compatible. I think it changed in 4.0. >>>>> >>>>> Amish >>>>> >>>>> On 7/16/15, 6:45 PM, "Shuangyang Yang" <sy...@linkedin.com.INVALID> >>>>>wrote: >>>>> >>>>>>Hi there, >>>>>> >>>>>>We are using lucene 2.9.1 in our product and thinking of upgrading to >>>>>>5.X. Is it plausible? Is the file format compatible? Is there any >>>>>>guide >>>>>>document that can give tips on how to do it? >>>>>> >>>>>>Thank you very much >>>>>>Best Regards >>>>>>--- >>>>>>Shuangyang Yang >>>>>>linkedin.com/in/everyoung<www.linkedin.com/in/everyoung> >>>>> >>>>> >>>>> --------------------------------------------------------------------- >>>>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >>>>> For additional commands, e-mail: java-user-h...@lucene.apache.org >>>>> >>>> >>>>--------------------------------------------------------------------- >>>>To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >>>>For additional commands, e-mail: java-user-h...@lucene.apache.org >>>> >>> >>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >>> For additional commands, e-mail: java-user-h...@lucene.apache.org >>> >> >>--------------------------------------------------------------------- >>To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >>For additional commands, e-mail: java-user-h...@lucene.apache.org >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org >
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