high-traffic

Hello fellow technicians, Let's assume we have a (PHP) website with millions of visitors a month and we running a SolR index on the website with 4 million documents hosted. Solr is running on 4 separate servers where one server is the master and other 3 servers are replicated. There can be inserted thousands of documents into Solr every 5 minutes. And besides that, user can update their account which also should trigger a solr update. I am looking for a safe strategy to rebuild the index fast and safe without missing any document. And to have a safe delta/update strategy. I have thought about

In a high traffic application, is it possible for mysqli_insert_id() to return the wrong id, or to confuse the id between two INSERT queries performed nearly simultaneously? No. mysqli_insert_id returns the most the AUTO_INCREMENT value from the most recent INSERT query on the current connection. It will never get confused with another connection, for example. No. How can I be so sure? Because it would gave been reported and fixed a long time ago. Quoting from a previous answer to this exact same question: Look at http://dev.mysql.com/doc/refman/5.6/en/getting-unique-id.html for more