I need to migrate a large phpBB forum to a modern platform (preferably Discourse).
The forum:
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~870,000 posts
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Hebrew-language community (right-to-left support is required)
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Domain: otzar.org (significant SEO value — URL redirects are critical)
What I need:
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Full migration of all posts, threads, categories, users, and attachments
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Proper 301 redirects from old phpBB URLs to new Discourse URLs
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RTL (right-to-left) Hebrew language support configured correctly
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The forum should look and function properly after migration
Important:
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We cannot afford significant downtime
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All historical data must be preserved
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SEO must be protected
Please share:
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Examples of similar large-scale phpBB migrations you’ve done
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Your approach to URL mapping and redirects
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Estimated timeline and cost