Help on migrating solr statistics

[Vee Mugadza]

Dear User Community

I have an old DSpace 1.8x that I am moving to DSpace 6.3.

I need tips on the following:

1. Migrating solr statistics between DSpace 1.8x and 6.3. Were there changes in the schema of the statistics across versions of DSpace or I can just copy the right folders across?

2. Any tips on regenerating solr stats from tomcat logs. I did try the Dspace logs but the DSpace script (with appropriate option) reports zero (0) events. 

Thank you

Junior