By default, up to thirty active writable snapshots can be created and managed on a cluster using the following methods:

• OneFS command-line interface (CLI)
• OneFS RESTful platform API

The CLI subcommands and syntax for writable snapshots are as follows:

# isi snapshot writable -h

Description:

    Manage writable snapshots.

Required Privileges:

    ISI_PRIV_SNAPSHOT

Usage:

    isi snapshot writable <action>

        [--timeout <integer>]

        [{--help | -h}]

Actions:

    create    Create a writable snapshot.

    delete    Delete writable snapshots.

    list      View a list of writable snapshots.

    view      View properties of a writable snapshot.

Options:

  Display Options:

    --timeout <integer>

        Number of seconds for a command timeout (specified as 'isi --timeout NNN

        <command>').

    --help | -h

        Display help for this command.

See 'isi snapshot writable <subcommand> --help' for more information on a

specific subcommand.

Similarly, the platform API primitives can be viewed by browsing the following cluster URL: https://<cluster_IP>:8080/platform/14/snapshot/writable?describe

On creation of a new writable snapshot, all files contained in the snapshot source, or HEAD directory tree, are instantly available for both reading and writing in the target namespace. Once it is no longer required, a writable snapshot can be easily deleted by CLI.

Note: There are no corresponding WebUI controls for configuring writable snapshots.