Patent ID: 8819657

Claim:
A method for maintaining data consistency during a software update installation for a virtualized application, comprising: processing software update data associated with a software update installation for a virtualized application, wherein the virtualized application comprises at least one of read-only data and read-write data; and coupling the software update data with the at least one of read-only data and read-write data, wherein data comprising the virtual application is stored in a plurality of sub-layers, wherein higher-level sub-layers override data in lower-level sub-layers, wherein the at least one of read-only data and read-write data is stored in a lower-level sub-layer, wherein the software update data is stored in a higher-level sub-layer, thereby overriding the at least one of read-only data and read-write data, wherein coupling the software update data with the at least one of read-only data and read-write data comprises creating a software update sub-layer for capturing the software update data and configuring a read-write sub-layer to be read-only by temporarily converting the read-write sub-layer to a temporary read-only sub-layer, wherein the read-write sub-layer comprises the read-write data.