Long description

Three data server blocks are shown here. On top of the last two blocks it is labeled: The passive masters will only be used if the active master fails or is taken off line for maintenance. Two arrows labeled Web applications, points to the first data server block. Below the first data server block it is labeled Master(Active) and below the next two blocks it is labeled Master (passive). All the three blocks are connected by arrows, and below the arrow it is labeled: Modification to master data are propagated out to all subordinates.