temporarily need a considerable amount of extra disk space, before the differencing image obsoleted by the merge operation is deleted. • Immutable images. When an image is switched to immutable mode, a differencing direct loopback mounting of virtual disk images, because it is snapshot aware. It can selectively merge disk differencing images in an exposed virtual hard disk, providing historical or up-to-date representations the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom

mediumAttachment The medium attachment which needs to be cleaned up. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target image in the chain. Redundant, but drastically reduces IPC. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target follows that there are two logical directions of the merge operation: from ancestor to descendant (forward merge) and from descendant to ancestor (backward merge). Let us consider the following medium chain:

mediumAttachment The medium attachment which needs to be cleaned up. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target image in the chain. Redundant, but drastically reduces IPC. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target follows that there are two logical directions of the merge operation: from ancestor to descendant (forward merge) and from descendant to ancestor (backward merge). Let us consider the following medium chain:

mediumAttachment The medium attachment which needs to be cleaned up. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target image in the chain. Redundant, but drastically reduces IPC. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target follows that there are two logical directions of the merge operation: from ancestor to descendant (forward merge) and from descendant to ancestor (backward merge). Let us consider the following medium chain:

mediumAttachment The medium attachment which needs to be cleaned up. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target image in the chain. Redundant, but drastically reduces IPC. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target follows that there are two logical directions of the merge operation: from ancestor to descendant (forward merge) and from descendant to ancestor (backward merge). Let us consider the following medium chain:

mediumAttachment The medium attachment which needs to be cleaned up. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target image in the chain. Redundant, but drastically reduces IPC. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target follows that there are two logical directions of the merge operation: from ancestor to descendant (forward merge) and from descendant to ancestor (backward merge). Let us consider the following medium chain:

temporarily need a considerable amount of extra disk space, before the differencing image obsoleted by the merge operation is deleted. 101 5 Virtual Storage • Immutable images. When an image is switched to immutable direct loopback mounting of virtual disk images, because it is snapshot aware. It can selectively merge disk differencing images in an exposed virtual hard disk, providing historical or up-to-date representations the Software without restriction, in- cluding without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom

mediumAttachment The medium attachment which needs to be cleaned up. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target image in the chain. Redundant, but drastically reduces IPC. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target follows that there are two logical directions of the merge operation: from ancestor to descendant (forward merge) and from descendant to ancestor (backward merge). Let us consider the following medium chain:

mediumAttachment The medium attachment which needs to be cleaned up. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target image in the chain. Redundant, but drastically reduces IPC. source Merge source medium. target Merge target medium. mergeForward Merge direction. parentForTarget For forward merges: new parent for target follows that there are two logical directions of the merge operation: from ancestor to descendant (forward merge) and from descendant to ancestor (backward merge). Let us consider the following medium chain:

temporarily need a considerable amount of extra disk space, before the differencing image obsoleted by the merge operation is deleted. • Immutable images. When an image is switched to immutable mode, a differencing direct loopback mounting of virtual disk images, because it is snapshot aware. It can selectively merge disk differencing images in an exposed virtual hard disk, providing historical or up-to-date representations the Software without restriction, in- cluding without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom