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What exactly does the default ibdata1 file store that does not exist in a mysqldump?

I've got a backup/rsync job that stores dump files of a MySQL 5.5 database on a remote server for rotating daily/weekly backups.

However, I am not currently backing up the ibdata1 file itself -- is this a nightmare waiting to happen or are dump files enough?

Thanks

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No, if you are doing proper mysqldumps the information necessary to rebuild the database will be present. You don't have to backup the ibdata1 file.

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    Proper mysqldumps are comprised of SQL code and all the data necessary to recreate all the tables and their relationships in the database they were made from. – Fiasco Labs Jan 26 '13 at 2:18

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