Upgrading from lucene 2.9.1 to 5.X

[Shuangyang Yang <sy...@linkedin.com.INVALID>]

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>

Re: Upgrading from lucene 2.9.1 to 5.X

[Erick Erickson <er...@gmail.com>]

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" <er...@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" <er...@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 <am...@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-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
>>
>
>
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Re: Upgrading from lucene 2.9.1 to 5.X

[Shuangyang Yang <sy...@linkedin.com.INVALID>]

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" <er...@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" <er...@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 <am...@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-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
>>
>
>---------------------------------------------------------------------
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>


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Re: Upgrading from lucene 2.9.1 to 5.X

[Erick Erickson <er...@gmail.com>]

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" <er...@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 <am...@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-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
>

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Re: Upgrading from lucene 2.9.1 to 5.X

[Shuangyang Yang <sy...@linkedin.com.INVALID>]

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" <er...@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 <am...@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-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
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>


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Re: Upgrading from lucene 2.9.1 to 5.X

[Erick Erickson <er...@gmail.com>]

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

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Re: Upgrading from lucene 2.9.1 to 5.X

["Shah, Amish" <am...@intel.com>]

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>


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