Hi Erick,

Thinking some more about the differences between the two sort orders has 
suggested another possibility.  We also have a geo spatial field defined in the 
index:

  echo "$(date) Creating geoLocation field"
  curl -X POST -H 'Content-type:application/json' --data-binary '{
    "add-field":{
       "name":"geoLocation",
       "type":"location",
       "stored":true,
       "indexed":true
    }
  }' http://localhost:8983/solr/address/schema

One of the differences between the two sort orders is that when the data is 
sorted by locality and post code, it means that addresses that are close to 
each other will be sorted together as both locality and postcode have 
geographic meaning.  So when they are indexed, they will be indexed in groups 
of addresses that are quite near to each other.

When the data is sorted by DPID, the order is near random as the dpid has no 
meaning at all, so the geo location sequence should be random as well.

I don't have time to test this at the moment, as I need to get my project back 
on track after chasing this performance issue but it might ring a bell with 
somebody.

Regards,

David

David Howe
Java Domain Architect
Postal Systems
Level 16, 111 Bourke Street Melbourne VIC 3000

T  0391067904

M  0424036591

E  david.h...@auspost.com.au

W  auspost.com.au
W  startrack.com.au

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