Method and system for using non-variable compression group size in partial cloning

摘要

Method and system for partially cloning a data container with compression is provided. A storage operating system determines if a portion of a source data container that is to be cloned includes a plurality of compressed blocks that are compressed using a non-variable compression group size. The operating system clones the plurality compressed blocks with the non-variable compression group size and de-compresses a plurality of blocks of the data container that are not within the non-variable compression group size. The plurality of compressed blocks and the plurality of blocks that are not within the non-variable compression group size are then stored as a partially cloned copy of the source data container.

主权项

1. A machine implemented method for partially cloning a data container, comprising:
determining a compressed block compressed using a non-variable compression group size; cloning the compressed block using the non-variable compression group size without having to de-compress the compressed block; de-compressing a block of the data container that is outside the non-variable compression group size; and storing the cloned compressed block and the decompressed block that is not within the non-variable compression group size as a partially cloned portion of the data container.