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DRBD and what database you use are orthogonal surely?



The usage of DRDB somewhat eliminates the need for built in master/master replication, since its handled at the block layer. The two disks are always in sync, thus you don't need mysql's master/master setup. One of the main features missing from Postgres is that feature. Since it's not being used in their Mysql setup many people might ask why they wouldn't just use Postgres.




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