Thursday, December 22, 2005


I have been hearing about DRBD a while as a way to add redundancy for a server.  DRDB is a block device that can be mirrored across a network.  This is very similar to a network RAID-1.

I have been thinking about doing this for one of the databases that I use.  I could set up two machines that run mysql.  Only one machine at at time would be writing to the database and the file system, but both machines would have access to the files.  When one of the machines go down, the other automatically takes over.

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