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  • Archive a Snapshot in MongoDB

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    To archive a snapshot first you need to create a mongoDB snapshot, The same is discussed on post Creating a mongDB snapshot with LVM. Now mount the created snapshot and copy this to separated storage volume. Or you can create a block level copy of snapshot using following commands:

    umount /dev/vg0/snap_db-01
    dd if=/dev/vg0/snap_db-01 | gzip > snap_db-01.gz
    

    Below is the description of above command sequence:

    Ensures that the /dev/vg0/snap_db-01 device is not mounted. Never take a block level copy of a file-system or file-system snapshot that is mounted. Performs a block level copy of the entire snapshot image using the dd command and compresses the result in a gzipped file in the current working directory.

    Note: The above command create a large gz file in the working directory. Please insure that this directory or file system has enough free space.

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