DISTRIBUTED SYSTEMS HAVING VERSIONED STORAGE REPLICA TABLES

    公开(公告)号:US20250036441A1

    公开(公告)日:2025-01-30

    申请号:US18358155

    申请日:2023-07-25

    Abstract: A process includes creating, by a kernel of a distributed system, entries in a storage replica table, which are associated with a guest physical memory address. The process includes storing, by the kernel, data in the entries associating the entries with respective versions of content for the guest physical memory address; storing, by the kernel, data in the entries associating the entries with respective stable storage block addresses; and storing, by the kernel, data in the entries associating the entries with respective real physical memory addresses. The process includes, responsive to a read request to read content associated with a first version of the versions, accessing, by the kernel, the storage replica table. The process includes, responsive to the accessing the storage replica table, identifying, by the kernel, a first entry of the entries associated with the first version. The first entry contains data associating the first entry with a first real physical memory address. The process includes reading, by the kernel, data from the first real physical memory address.

    DATA ACCESS BY VIRTUAL PROCESSORS IN A DISTRIBUTED SYSTEM

    公开(公告)号:US20240403101A1

    公开(公告)日:2024-12-05

    申请号:US18328010

    申请日:2023-06-02

    Abstract: In some examples, a distributed system includes a plurality of computer nodes comprising respective physical input/output (I/O) interfaces to a network-attached storage system. A virtual I/O interface is between a distributed virtual management program and a guest operating system (OS) of a virtual machine (VM). A plurality of virtual processors access the network-attached storage system through the virtual I/O interface in parallel using the respective physical I/O interfaces, where a first virtual processor in a first computer node is to use a data structure in the virtual I/O interface to submit a request to access data in the network-attached storage system and to receive a result of the request, and where the access of data from the network-attached storage system to satisfy the request is performed locally at the first computer node using the physical I/O interface of the first computer node. The distributed virtual management program maintains coherency of the data structure across multiple computer nodes.

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