lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Erick Erickson <erickerick...@gmail.com>
Subject Re: Upgrading from lucene 2.9.1 to 5.X
Date Fri, 17 Jul 2015 19:03:30 GMT
Yes, very significant ones. Also memory usage is vastly improved.

On Fri, Jul 17, 2015 at 11:31 AM, Shuangyang Yang
<syang@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" <erickerickson@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
>><syang@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" <erickerickson@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.shah@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" <syang@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-unsubscribe@lucene.apache.org
>>>>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>>>>
>>>>
>>>>---------------------------------------------------------------------
>>>>To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>>>>For additional commands, e-mail: java-user-help@lucene.apache.org
>>>>
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>>
>>
>>---------------------------------------------------------------------
>>To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>>For additional commands, e-mail: java-user-help@lucene.apache.org
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>

---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org


Mime
View raw message