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Add VIR_STORAGE_VOL_CREATE_PREALLOC_METADATA flag to virStorageVolCreateXML and virStorageVolCreateXMLFrom. This flag requests metadata preallocation when creating/cloning qcow2 images, resulting in creating a sparse file with qcow2 metadata. It has only slightly larger disk usage compared to new image with no allocation, but offers higher performance. |
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Makefile.am |