发明授权
US08930620B2 Host discovery and handling of ALUA preferences and state transitions 有权
主机发现和处理ALUA偏好和状态转换

Host discovery and handling of ALUA preferences and state transitions
摘要:
Various systems and methods can discover asymmetric logical unit (LUN) access (ALUA) preferences and/or state transitions and use those preferences and/or state transitions to control how a host accesses a LUN in an ALUA array. One such method involves detecting a preferred controller for a LUN and then detecting that a current owner controller of the LUN is not the preferred controller. In response, the method can initiate an ownership change from the current owner controller to the preferred controller. Another method involves detecting an initial state of a first controller with respect to a LUN. The method then detects a subsequent state of the first controller with respect to the LUN subsequent to detecting the initial state. The method can then cause a computing device to access the LUN via a second controller, in response to the subsequent state not being the active optimized state.
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