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Knowledge Base

FAQ-What is active-active working mode for dual controllers

Publication Date:  2015-07-23  |   Views:  671  |   Downloads:  0  |   Document ID:  EKB1000082750


Issue Description

What is active-active working mode for dual controllers?


In active-active working mode for dual controllers, both of the two controllers work as the active controllers and process the I/O requests from the application server together. When one of the two controllers fails or becomes offline, the other controller takes over the services from the failed or offline controller without compromising its own services. This mode ensures the high system reliability through the 1+1 redundancy of controllers. It balances service loads, fully utilizes resources, and improves the system performance.