Distribution of snaps for load balancing data node clusters
Abstract:
Snaps are distributed among data nodes for load balancing and overload avoidance. A snap is initially associated with a first VNAS server on a first data node that hosts the primary volume being snapped. A second data node is selected based on loading. The second data node may be in the same or a different cluster. A second VNAS server is instantiated on the second data node. The snap is then mounted on the second VNAS server. The second VNAS server may be configured as the target for all reads to the snap. If the second data node is in a different cluster than the snap may be copied or moved from a first SAN node to a second SAN node. Multiple copies of snaps may be distributed, and individual snaps and copies may be associated with different SLOs.
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