We have a client who hosts approximately 10,000 products on his current ecommerce website. We are upgrading him to a new platform and will be importing his existing database of products. The old categories will be re-mapped to new categories. Likewise the current URLs will not necessarily be relevant in the new system. We don't want him to lose any rankings? What is the best approach to deal with this transition?
How do we deal with all the old URLs?
I think we can get these from the database we are going to import - should we just automatically write these out to .htaccess (301 redirect) to the new url (there will be 10,000 of them)?
Should we try to somehow keep using the old URLs, which are less than ideal and don't really logically match up with the new category hierarchy?
Please help, I am a little baffled by what is the best approach?
Thanks in Advance...