公开(公告)号：US20170160980A1

公开(公告)日：2017-06-08

申请号：US15085479

申请日：2016-03-30

Applicant: PLEXISTOR LTD.

Inventor： Amit Golander ,  Sagi Manole ,  Boaz Harrosh

IPC: G06F3/06

CPC classification number: G06F3/0643 ,  G06F3/0623 ,  G06F3/0673 ,  G06F16/00 ,  G06F16/2308

Abstract: A method, apparatus and product for accelerating concurrent access to a file in a memory-based file system. The method comprising receiving a request issued by a program, for accessing a file stored in a memory-based file system; and subject to the request being associated with data modification of data within the file, and subject to the modification not necessitating change in a structure of a data structure used for content lookup for the file, acquiring a lock to the file to the program, wherein the lock is acquired in a shared mode.

公开(公告)号：US10606803B2

公开(公告)日：2020-03-31

申请号：US15630392

申请日：2017-06-22

Applicant: PLEXISTOR LTD.

Inventor： Amit Golander ,  Sagi Manole ,  Boaz Harrosh

IPC: G06F16/30 ,  G06F16/13 ,  G06F16/178 ,  G06F16/27 ,  G06F16/22 ,  G06F16/901 ,  G06F3/06

Abstract: Method, apparatus and product for data cloning in a memory-based file systems. A content of each object of the file system is retained in data units and represented using a tree of the nodes comprising tree nodes and leaf nodes. The file system utilizes a volatile resource usage collection and volatile reference counters for each node of the nodes. In response to mounting the file system, a storage retaining a file system metadata is scanned to compile the volatile resource usage collection and the volatile reference counters. In response to a determination to reuse a pointed node of a tree of an object by a pointing node, a volatile reference counter of the pointed node is updated and the pointing node is atomically set, using a single instruction, to point to the pointed node.

公开(公告)号：US20170160979A1

公开(公告)日：2017-06-08

申请号：US15154605

申请日：2016-05-13

Applicant: PLEXISTOR, LTD.

Inventor： Amit Golander ,  Yigal Korman ,  Boaz Harrosh

IPC: G06F3/06 ,  G06F12/10 ,  G06F12/12

CPC classification number: G06F3/0641 ,  G06F3/0608 ,  G06F3/0619 ,  G06F3/065 ,  G06F3/068 ,  G06F12/0292 ,  G06F12/063 ,  G06F12/0866 ,  G06F12/1009 ,  G06F12/1475 ,  G06F2212/1032 ,  G06F2212/1052

Abstract: Method, system and product for direct access to de-duplicated data units in memory-based file systems. The method comprising: updating a page entry in a page table of a process to include a direct access pointer to a de-duplicated data unit retained by the memory-based file system, wherein the page entry is set to be write protected; detecting a page fault occurring due to the process performing a store instruction to the de-duplicated data unit; and in response to said detecting: allocating a new data unit; copying content of the de-duplicated data unit to the new data unit; and replacing the direct access pointer to the de-duplicated data unit with a direct access pointer to the new data unit.