Invention Publication
- Patent Title: USE OF CLUSTER-LEVEL REDUNDANCY WITHIN A CLUSTER OF A DISTRIBUTED STORAGE MANAGEMENT SYSTEM TO ADDRESS NODE-LEVEL ERRORS
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Application No.: US17680621Application Date: 2022-02-25
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Publication No.: US20230153213A1Publication Date: 2023-05-18
- Inventor: Wei Sun , Anil Paul Thoppil , Anne Maria Vasu
- Applicant: NetApp, Inc.
- Applicant Address: US CA San Jose
- Assignee: NetApp, Inc.
- Current Assignee: NetApp, Inc.
- Current Assignee Address: US CA San Jose
- Main IPC: G06F11/16
- IPC: G06F11/16 ; G06F11/30 ; G06F16/27

Abstract:
Systems and methods that make use of cluster-level redundancy within a distributed storage management system to address various node-level error scenarios are provided. Rather than making use of a generalized one-size-fits-all approach in an effort to reduce complexity, an approach tailored to the node-level error scenario at issue may be performed to avoid doing more than necessary. According to one embodiment, responsive to identification of a failed RAID stripe by a node of a cluster of a distributed storage management system, for each block ID of multiple block IDs associated with the failed RAID stripe, a data block is restored corresponding to the block ID by reading the data block from another node of the cluster having a redundant copy of the data block; and writing the redundant copy of the data block to a storage area of the node that is unaffected by the failed RAID stripe.
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