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Patent Agency Ranking
公开(公告)号：US20210232314A1
公开(公告)日：2021-07-29
申请号：US16752001
申请日：2020-01-24
Applicant: NetApp, Inc.
Inventor： James Philip Wittig , Forrest Trimbell , Daniel David McCarthy , Jared Cantwell , Mark Olson , Christopher Cason
IPC: G06F3/06
Abstract: A technique is configured to maintain multiple copies of data served by storage nodes of a cluster during upgrade of a storage node to ensure continuous protection of the data served by the nodes. The data is logically organized as one or more volumes on storage devices of the cluster and includes metadata that describe the data of each volume. A data protection system may be configured to maintain at least two copies of the data in the cluster during upgrade to a storage node that is assigned to host one of the copies of the data but that is taken offline during the upgrade. As a result, an original slice service of the node may be rendered unavailable during the upgrade. In response, the technique redirects replicated data targeted to the original slice service to a standby pool of slice services in accordance with a degraded redundant metadata service of the cluster. In the event the standby slice service itself subsequently becomes unavailable, another standby slice service from the standby pool is activated to receive the subsequent data. In this manner, cascading failure of secondary slice slices is handled.
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公开(公告)号：US11194501B2
公开(公告)日：2021-12-07
申请号：US16752001
申请日：2020-01-24
Applicant: NetApp, Inc.
Inventor： James Philip Wittig , Forrest Trimbell , Daniel David McCarthy , Jared Cantwell , Mark Olson , Christopher Cason
Abstract: A technique is configured to maintain multiple copies of data served by storage nodes of a cluster during upgrade of a storage node to ensure continuous protection of the data served by the nodes. The data is logically organized as one or more volumes on storage devices of the cluster and includes metadata that describe the data of each volume. A data protection system may be configured to maintain at least two copies of the data in the cluster during upgrade to a storage node that is assigned to host one of the copies of the data but that is taken offline during the upgrade. As a result, an original slice service of the node may be rendered unavailable during the upgrade. In response, the technique redirects replicated data targeted to the original slice service to a standby pool of slice services in accordance with a degraded redundant metadata service of the cluster. In the event the standby slice service itself subsequently becomes unavailable, another standby slice service from the standby pool is activated to receive the subsequent data. In this manner, cascading failure of secondary slice slices is handled.
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公开(公告)号：US11216204B2
公开(公告)日：2022-01-04
申请号：US16688556
申请日：2019-11-19
Applicant: NetApp, Inc.
Inventor： James Philip Wittig , Jared Cantwell , Mark Olson
IPC: G06F3/06
Abstract: A technique maintains multiple copies of data served by storage nodes of a cluster during upgrade of a storage node to ensure continuous protection of the data served by the nodes. The data is logically organized as one or more volumes on storage devices of the cluster and includes metadata that describe the data of each volume. A data protection system may be configured to maintain two copies of the data in the cluster during upgrade to a storage node that is assigned to host one of the copies of the data but that is taken offline during the upgrade. As a result, a slice service of the node may become unavailable during the upgrade. In response to the unavailability of the slice service, the technique redirects replicated data targeted to the slice service to a standby slice service according to a degraded redundant metadata (DRuM) service of the cluster.
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公开(公告)号：US20210149566A1
公开(公告)日：2021-05-20
申请号：US16688556
申请日：2019-11-19
Applicant: NetApp, Inc.
Inventor： James Philip Wittig , Jared Cantwell , Mark Olson
IPC: G06F3/06
Abstract: A technique maintains multiple copies of data served by storage nodes of a cluster during upgrade of a storage node to ensure continuous protection of the data served by the nodes. The data is logically organized as one or more volumes on storage devices of the cluster and includes metadata that describe the data of each volume. A data protection system may be configured to maintain two copies of the data in the cluster during upgrade to a storage node that is assigned to host one of the copies of the data but that is taken offline during the upgrade. As a result, a slice service of the node may become unavailable during the upgrade. In response to the unavailability of the slice service, the technique redirects replicated data targeted to the slice service to a standby slice service according to a degraded redundant metadata (DRuM) service of the cluster.
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公开(公告)号：US20200250201A1
公开(公告)日：2020-08-06
申请号：US16853660
申请日：2020-04-20
Applicant: NetApp, Inc.
Inventor： Jared Cantwell , William Minckler , Joe Roback , James Philip Wittig
Abstract: Disclosed are systems, computer-readable mediums, and methods for receiving a start replication message to replicate a source volume to a replicated volume. A source system forwards I/O requests to the replica server. A data structure associated with the replicated volume is initialized. A write request is received from the source system. The write data is written to the replicated volume and the data structure is updated. Source metadata associated with the source volume is received. The source metadata is compared with prior metadata associated with a prior point-in-time image of the source volume to determine blocks of data that have changed since the prior point-in-time image of the source volume. A first block is determined to not be retrieved based upon the data structure. A second block is determined to be retrieved based upon the data structure. The second block is received and written to the replicated volume.
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