Do anybody has any thoughts on below email points.

Also, can anybody help me to locate any performance comparison between 
Databases (RDBMS) vs Lucene/ES index, for insert/update/delete feature.

Thanks 

On Friday, May 16, 2014 7:44:56 PM UTC+5:30, Gaurav gupta wrote:
>
> Hi,
>
> We are exploring the Lucene/ES as an embedded search engine inside our 
> product offering and while analysis following concerns come up. Could you 
> share your thoughts on how serious/genuine these are :-
>
> 1.    Read Dominant - Data in Lucene Index is intended to be read 
> predominantly and not to be frequently updated. Although, it supports NEAR 
> Real-time Searches. We might have scenarios where one or multiple users are 
> updating/deleting few documents (concurrently) in a large index repository 
> (250 million documents).
>
>  2.    While Lucene Index facilitates insert, delete and update of 
> documents, single field update capabilities aren't good especially if that 
> field is text indexed. Whenever a new field is added or the contents of an 
> existing field is changed, every single document in Lucene Index must be 
> reprocessed in its entirety before the data is populated for the new field 
> in all documents.
>
> Thanks
> Gaurav
>

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