公开(公告)号：US20230071126A1

公开(公告)日：2023-03-09

申请号：US17466825

申请日：2021-09-03

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Annmary Justine Koomthanam ,  Jothivelavan Sivashanmugam

IPC: G06F12/123 ,  G06F12/02 ,  G06F12/0891 ,  G06F3/06

Abstract: Examples described herein relate to In some examples, a least recently used (LRU) list used to evict nodes from a cache is traversed, the nodes referencing data blocks storing data in a storage device, the nodes being leaf nodes in a tree representing a file system, and for each traversed node, determining a stride length as an absolute value of a difference between a block offset value of the traversed node and a block offset value of a previously traversed node, comparing the stride length to a proximity threshold, and updating a sequential access pattern counter based at least in part on the comparing; and proactively prefetching nodes from the storage device to the cache when the sequential access pattern counter indicates a detected pattern of sequential accesses to nodes.

公开(公告)号：US12093316B2

公开(公告)日：2024-09-17

申请号：US16263390

申请日：2019-01-31

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Suparna Bhattacharya ,  Annmary Justine Koomthanam ,  John Michael Czerkowicz

IPC: G06F16/90 ,  G06F9/455 ,  G06F16/188 ,  G06F16/27 ,  G06F16/901 ,  G06F16/908

CPC classification number: G06F16/9027 ,  G06F9/45558 ,  G06F16/192 ,  G06F16/273 ,  G06F16/908 ,  G06F2009/45595

Abstract: Example implementations relate to partial file system instances. In an example, a subset of objects of a source file system instance on a source system are replicated to a target system to form a partial file system instance on the target system comprised of the subset of objects. Each of the objects of the source file system instance is identified by a signature based on content of each of the objects and the objects exhibit a hierarchical relationship to a root object in the file system instance. An unmaterialized object is dynamically added to the partial file system instance by replicating the corresponding object from the source file system instance. The target system is asynchronously updated from the source file system instance based on a comparison of the partial file system instance to the source file system instance.

公开(公告)号：US11829302B2

公开(公告)日：2023-11-28

申请号：US17466825

申请日：2021-09-03

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Annmary Justine Koomthanam ,  Jothivelavan Sivashanmugam

IPC: G06F12/123 ,  G06F12/02 ,  G06F3/06 ,  G06F12/0891

CPC classification number: G06F12/123 ,  G06F3/0604 ,  G06F3/0659 ,  G06F3/0679 ,  G06F12/0246 ,  G06F12/0891

Abstract: Examples described herein relate to In some examples, a least recently used (LRU) list used to evict nodes from a cache is traversed, the nodes referencing data blocks storing data in a storage device, the nodes being leaf nodes in a tree representing a file system, and for each traversed node, determining a stride length as an absolute value of a difference between a block offset value of the traversed node and a block offset value of a previously traversed node, comparing the stride length to a proximity threshold, and updating a sequential access pattern counter based at least in part on the comparing; and proactively prefetching nodes from the storage device to the cache when the sequential access pattern counter indicates a detected pattern of sequential accesses to nodes.

公开(公告)号：US20200250232A1

公开(公告)日：2020-08-06

申请号：US16263390

申请日：2019-01-31

Applicant: HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP

Inventor： Suparna Bhattacharya ,  Annmary Justine Koomthanam ,  John Michael Czerkowicz

IPC: G06F16/901 ,  G06F16/908 ,  G06F16/27 ,  G06F16/188 ,  G06F9/455

Abstract: Example implementations relate to partial file system instances. In an example, a subset of objects of a source file system instance on a source system are replicated to a target system to form a partial file system instance on the target system comprised of the subset of objects. Each of the objects of the source file system instance is identified by a signature based on content of each of the objects and the objects exhibit a hierarchical relationship to a root object in the file system instance. An unmaterialized object is dynamically added to the partial file system instance by replicating the corresponding object from the source file system instance. The target system is asynchronously updated from the source file system instance based on a comparison of the partial file system instance to the source file system instance.