×

High availability failover manager

  • US 9,785,525 B2
  • Filed: 09/24/2015
  • Issued: 10/10/2017
  • Est. Priority Date: 09/24/2015
  • Status: Active Grant
First Claim
Patent Images

1. A method comprising:

  • receiving a write request directed towards a logical unit (LUN), the write request having a data, a logical block address (LBA) and a length representing an address range of the LUN, the LBA and the length mapped to a volume associated with the LUN, the write request received at a first node of a plurality of nodes of a cluster, each node of the cluster having a memory and attached to a storage array storing the volume;

    recording the write request in a first non-volatile log of the first node, the first non-volatile log stored on a storage device different from the storage array storing the volume;

    monitoring a state of availability of the first node to service the volume;

    in response to a lack of availability of the first node to service the volume, determining whether a second node is able to takeover service of the volume; and

    in response to determining that the second node is able to takeover service of the volume, triggering a failover of the volume to the second node of the cluster, wherein the first non-volatile log is mirrored to a second non-volatile log accessible by the second node, and wherein the second non-volatile log is up to date with the first non-volatile log.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×