I have requirement to migrate 27000 approx pages from old website to AEM. I see that 80 % of pages have same structure but there are some pages which have completely different structure. What should be a suggested approach for content migration to AEM?
Is it from old version of AEM to new version of AEM ?
You can write groovy script to migrate pages
AEM supports Grabbit for content migration.
"The purpose of Grabbit is to provide a fast and reliable way of copying content from one Sling (specifically Adobe CQ/AEM) instance to another."
For usage with AEM, please check the below article.
Hope that helps!