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From Shai Erera <ser...@gmail.com>
Subject Re: How to merge several Taxonomy indexes
Date Thu, 02 Apr 2015 11:25:15 GMT
In some cases, MMapDirectory offers even better performance, since the JVM
doesn't need to manage that RAM when it's doing GC.

Also, using only RAMDirectory is not safe in that if the JVM crashes, your
index is lost.

On Thu, Apr 2, 2015 at 12:54 PM, Christoph Kaser <lucene_list@iconparc.de>
wrote:

> Hi Gimantha,
>
> why do you use a RAMDirectory? If your merged index fits into RAM
> completely, a MMapDirectory should offer almost the same performance. And
> if not, it is definitely the better choice.
>
> Regards
> Christoph
>
>
> Am 02.04.2015 um 12:38 schrieb Gimantha Bandara:
>
>> Hi All,
>>
>> I have successfully setup a merged indices and drilldown and usual search
>> operations work perfect.
>> But, I have a side question. If I selected RAMDirectory as the destination
>> Indices in merging, probably the jvm can go out of memory if the merged
>> indices are too big. Is there a way I can handle this issue?
>>
>> On Tue, Mar 24, 2015 at 12:18 PM, Gimantha Bandara <gimantha@wso2.com>
>> wrote:
>>
>>  Hi Christoph,
>>>
>>> My mistake. :) It does the exactly what i need. figured it out later..
>>> Thanks a lot!
>>>
>>> On Tue, Mar 24, 2015 at 3:14 AM, Gimantha Bandara <gimantha@wso2.com>
>>> wrote:
>>>
>>>  Hi Christoph,
>>>>
>>>> I think TaxonomyMergeUtils is to merge a taxonomy directory and an index
>>>> together (Correct me if I am wrong). Can it be used to merge several
>>>> taxonomyDirectories together and create one taxonomy index?
>>>>
>>>> On Mon, Mar 23, 2015 at 9:19 PM, Christoph Kaser <
>>>> lucene_list@iconparc.de
>>>>
>>>>> wrote:
>>>>> Hi Gimantha,
>>>>>
>>>>> have a look at the class org.apache.lucene.facet.
>>>>> taxonomy.TaxonomyMergeUtils,
>>>>> which does exactly what you need.
>>>>>
>>>>> Best regards,
>>>>> Christoph
>>>>>
>>>>> Am 23.03.2015 um 15:44 schrieb Gimantha Bandara:
>>>>>
>>>>>  Hi all,
>>>>>>
>>>>>> Can anyone point me how to merge several taxonomy indexes? My
>>>>>> requirement
>>>>>> is as follows. I have  several taxonomy indexes and normal document
>>>>>> indexes. I want to merge taxonomy indexes together and other document
>>>>>> indexes together and perform search on them. One part I have figured
>>>>>> out.
>>>>>> It is easy. To Merge document indexes, all I have to do is create
a
>>>>>> MultiReader and pass it to IndexSearcher. But I am stuck at merging
>>>>>> the
>>>>>> taxonomy indexes. Is there a way to merge taxonomy indexes?
>>>>>>
>>>>>>
>>>>>>  --
>>>>> Dipl.-Inf. Christoph Kaser
>>>>>
>>>>> IconParc GmbH
>>>>> Sophienstrasse 1
>>>>> 80333 München
>>>>>
>>>>> www.iconparc.de
>>>>>
>>>>> Tel +49 -89- 15 90 06 - 21
>>>>> Fax +49 -89- 15 90 06 - 49
>>>>>
>>>>> Geschäftsleitung: Dipl.-Ing. Roland Brückner, Dipl.-Inf. Sven Angerer.
>>>>> HRB
>>>>> 121830, Amtsgericht München
>>>>>
>>>>>
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>>>>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>>>>
>>>>>
>>>>>  --
>>>> Gimantha Bandara
>>>> Software Engineer
>>>> WSO2. Inc : http://wso2.com
>>>> Mobile : +94714961919
>>>>
>>>>  --
>>> Gimantha Bandara
>>> Software Engineer
>>> WSO2. Inc : http://wso2.com
>>> Mobile : +94714961919
>>>
>>>
>>
>
> --
> Dipl.-Inf. Christoph Kaser
>
> IconParc GmbH
> Sophienstrasse 1
> 80333 München
>
> www.iconparc.de
>
> Tel +49 -89- 15 90 06 - 21
> Fax +49 -89- 15 90 06 - 49
>
> Geschäftsleitung: Dipl.-Ing. Roland Brückner, Dipl.-Inf. Sven Angerer. HRB
> 121830, Amtsgericht München
>
>
>
> ---------------------------------------------------------------------
> 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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