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kbase: incrementalbackupinternals: Add section on 'qemu-img bitmap' use
Define what users should look for when wanting to manipulate bitmaps themselves. Later on a patch will turn the bash algorithms into pseudocode for simplicity. Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
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@ -190,6 +190,20 @@ It's recommended to use ``--output=json`` parameter to work with a machine
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readable output rather than trying to process the human readable output by
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scripts. For processing JSON in shell the ``jq`` tool can be used.
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The ``qemu-img bitmap`` command allows modification of block-dirty-bitmaps of an
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offline image. It supports the following operations relevant to this document
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(see man page for full list of operations):
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``--add NAME``
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Creates a new bitmap named ``NAME``. Optionally ``-g`` can be used to
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specify granularity.
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``--remove NAME``
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Deletes bitmap ``NAME``.
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``--merge SRCBITMAP -b SRCFILE -F SRCFILEFMT DSTBITMAP``
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Merges bitmap ``SRCBITMAP`` from ``SRCFILE`` into ``DSTBITMAP``.
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Checking bitmap health
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----------------------
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