公开(公告)号：US20220075691A1

公开(公告)日：2022-03-10

申请号：US17527852

申请日：2021-11-16

Applicant: NetApp, Inc.

Inventor： Sneheet Kumar Mishra ,  Daniel David McCarthy ,  Christopher Clark Corey ,  Austino Nicholas Longo ,  Christopher Cason

IPC: G06F11/10 ,  H03M13/15

Abstract: A technique provides efficient data protection, such as erasure coding, for data blocks of volumes served by storage nodes of a cluster. Data blocks associated with write requests of unpredictable client workload patterns may be compressed. A set of the compressed data blocks may be selected to form a write group and an erasure code may be applied to the group to algorithmically generate one or more encoded blocks in addition to the data blocks. Due to the unpredictability of the data workload patterns, the compressed data blocks may have varying sizes. A pool of the various-sized compressed data blocks may be established and maintained from which the data blocks of the write group are selected. Establishment and maintenance of the pool enables selection of compressed data blocks that are substantially close to the same size and, thus, that require minimal padding.

公开(公告)号：US20210334241A1

公开(公告)日：2021-10-28

申请号：US16858294

申请日：2020-04-24

Applicant: NetApp, Inc.

Inventor： Daniel David McCarthy ,  Austino Nicholas Longo ,  Christopher Clark Corey ,  Sneheet Kumar Mishra

IPC: G06F16/182 ,  G06F16/16 ,  G06F12/02

Abstract: A technique transitions data blocks of volumes served by storage nodes of a storage cluster from an old data protection scheme (DPS) to a new DPS in a non-disruptive manner. Slice services of the storage nodes forward the data blocks associated with write requests to the block services for storage on storage devices of the nodes. Mapping of volume logical block addresses to block identifiers are contained in slice files, wherein there is a single slice file for each volume. To transition a volume between the old and new DPSs, the slice service tags the data blocks with the new DPS when forwarding new write requests to the block services. In accordance with a background transitioning process, the slice service also retrieves every data block referenced by the to slice file and then resends the data to the block service with the new DPS.

公开(公告)号：US20210334160A1

公开(公告)日：2021-10-28

申请号：US16858376

申请日：2020-04-24

Applicant: NetApp, Inc.

Inventor： Sneheet Kumar Mishra ,  Daniel David McCarthy ,  Christopher Clark Corey ,  Austino Nicholas Longo ,  Christopher Cason

IPC: G06F11/10 ,  H03M13/15

Abstract: A technique provides efficient data protection, such as erasure coding, for data blocks of volumes served by storage nodes of a cluster. Data blocks associated with write requests of unpredictable client workload patterns may be compressed. A set of the compressed data blocks may be selected to form a write group and an erasure code may be applied to the group to algorithmically generate one or more encoded blocks in addition to the data blocks. Due to the unpredictability of the data workload patterns, the compressed data blocks may have varying sizes. A pool of the various-sized compressed data blocks may be established and maintained from which the data blocks of the write group are selected. Establishment and maintenance of the pool enables selection of compressed data blocks that are substantially close to the same size and, thus, that require minimal padding.