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  2. Proxmox Backup Server - Wikipedia

    en.wikipedia.org/wiki/Proxmox_Backup_Server

    Proxmox Backup Server (short Proxmox BS) is an open-source backup software project supporting virtual machines, containers, and physical hosts. [3] The Bare-metal server is based on the Debian Linux distribution, with some extended features, such as out-of-the-box ZFS support and Linux kernel 5.4 LTS. [4]

  3. Proxmox Virtual Environment - Wikipedia

    en.wikipedia.org/wiki/Proxmox_Virtual_Environment

    Proxmox VE (PVE) can be clustered across multiple server nodes. [27] Since version 2.0, Proxmox VE offers a high availability option for clusters based on the Corosync communication stack. Starting from the PVE v.6.0 Corosync v.3.x is in use (not compatible with the earlier PVE versions).

  4. VMware VMFS - Wikipedia

    en.wikipedia.org/wiki/VMware_VMFS

    It was developed to store virtual machine disk images, including snapshots. Multiple servers can read/write the same filesystem simultaneously while individual virtual machine files are locked. VMFS volumes can be logically "grown" (non-destructively increased in size) by spanning multiple VMFS volumes together.

  5. Virtual machine - Wikipedia

    en.wikipedia.org/wiki/Virtual_machine

    A snapshot is a state of a virtual machine, and generally its storage devices, at an exact point in time. A snapshot enables the virtual machine's state at the time of the snapshot to be restored later, effectively undoing any changes that occurred afterwards.

  6. Shadow Copy - Wikipedia

    en.wikipedia.org/wiki/Shadow_Copy

    In Windows Server 2003, VSS is used to create incremental periodic snapshots of data of changed files over time. A maximum of 64 snapshots are stored on the server and are accessible to clients over the network. This feature is known as Shadow Copies for Shared Folders and is designed for a client–server model. [12]

  7. Btrfs - Wikipedia

    en.wikipedia.org/wiki/Btrfs

    Since a snapshot is a subvolume, creating nested snapshots is also possible. Taking snapshots of a subvolume is not a recursive process; thus, if a snapshot of a subvolume is created, every subvolume or snapshot that the subvolume already contains is mapped to an empty directory of the same name inside the snapshot. [64] [65]

  8. Snapshot (computer storage) - Wikipedia

    en.wikipedia.org/wiki/Snapshot_(computer_storage)

    In NTFS, access to snapshots is provided by the Volume Shadow-copying Service (VSS) in Windows XP and Windows Server 2003 and Shadow Copy in Windows Vista. Melio FS provides snapshots via the same VSS interface for shared storage. [2] Snapshots have also been available in the NSS (Novell Storage Services) file system on NetWare since version 4. ...

  9. Copy-on-write - Wikipedia

    en.wikipedia.org/wiki/Copy-on-write

    Copy-on-write (COW), also called implicit sharing [1] or shadowing, [2] is a resource-management technique [3] used in programming to manage shared data efficiently. Instead of copying data right away when multiple programs use it, the same data is shared between programs until one tries to modify it.