Solr + Complex Legacy Schema -- Best Practices?, válasz1, válasz2
800MB does not seem that big. Since all of your 6 tables have product
information it should not be very difficult to join them together and import
them into one Solr index. Again, all of this depends on what you're
searching on and what you want to display as results.
Have you taken a look at http://wiki.apache.org/solr/DataImportHandler ?
Although it is still in development, we've used it successfully to import
data from a large collection of tables joined together.
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