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.: US17680631Application Date: 2022-02-25
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Publication No.: US20230152986A1Publication 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: G06F3/06
- IPC: G06F3/06

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 using a generalized one-size-fits-all approach 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 identifying a missing branch of a tree implemented by a KV store of a first node of a cluster of a distributed storage management system, a branch resynchronization process may be performed, including, for each block ID in the range of block IDs of the missing branch (i) reading a data block corresponding to the block ID from a second node of the cluster that maintains redundant information relating to the block ID; and (ii) restoring the block ID within the KV store by writing the data block to the first node.
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