Hi Tim,

Thank you for your response. I am sure that there have been many 
improvements made to Dspace and Solr over the version updates and 
appreciate the effort of the devs.

I looked a bit deeper into the search results from both 5.8 and 7.3. It 
seems that the search finds the keyword in the thesis text. However, I 
found an item where the keyword is mentioned once in the text and the 
search found it. However, I also found a few items where the keyword 
appeared once or more times in the text that 7.3 did not find but 5.8

Where possibly this can be looked into to resolve the issue? The number of 
items is similar and the items looked to be migrated successfully. I have 
successfully run the full reindex commands found in Step 4 of the migration 
doc:
# Reindex all your content in DSpace
./dspace index-discovery -b
 
# (Optionally) also reindex everything into OAI-PMH endpoint
./dspace oai import

Please help. Any suggestion would be appreciated. 

Regards,
Bryan

On Wednesday, August 31, 2022 at 5:33:24 AM UTC+12 Tim Donohue wrote:

> Hi Bryan,
>
> It's really hard to say what could be going on without you digging more 
> into which items matched in 5.8 which didn't match in 7.3 (or visa versa).  
> It could be that 5.8 was actually returning incomplete results and the 
> results are *more accurate* in 7.3.  Or, as you imply, it's also possible 
> the other way around...somehow 7.3 isn't returning as accurate of results 
> as 5.8.  
>
> But, it is worth pointing out that the Solr search settings under DSpace 
> are enhanced little by little in every release. So, there were many 
> changes/improvements in 6.x and continue to be more in 7.x.  We've also 
> upgraded Solr several times in those releases, so it's possible that Solr 
> itself is returning slightly different results based on its new/updated 
> behavior.
>
> Overall, until you dig more deeply into those search result differences 
> between 5.x vs 7.x, I wouldn't assume that there's a bug in 7.x. There's 
> also the possibility you are just seeing improvements that resulted in more 
> accurate results.  But, that said, if you are able to pinpoint some sort of 
> buggy behavior, then definitely let us know & we'll work to get it assigned 
> and fixed in a future 7.x release.
>
> Tim
>
> On Monday, August 29, 2022 at 11:32:51 PM UTC-5 [email protected] wrote:
>
>> Hi,
>>
>> I am migrating Dspace from 5.8 to a new 7.3. I have followed the 
>> documentation and completed all tasks - 
>> https://wiki.lyrasis.org/display/DSDOC7x/Migrating+DSpace+to+a+new+server 
>> and https://wiki.lyrasis.org/display/DSDOC7x/Upgrading+DSpace
>>
>> When I search, for example, I get 26 items from Dspace 7.3 whereas 79 are 
>> from Dspace 5.8. When searching for an empty space, I get similar total 
>> counts e.g. 5172 and 5192.
>>
>> Did anyone experience this? To be clear, I have run the reindexing 
>> commands found in the documentation above and the commands were completed 
>> successfully.
>>
>> There was no useful log found since this is technically not an error.
>>
>> Any idea or suggestion would be appreciated.
>>
>> Regards,
>> Bryan
>>
>>

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