oracle vss writer service这个进程干嘛用的

volume shadow copy service (vss) writer

the oracle vss writer allows oracle database to participate in vss-initiated backup and recovery on windows 2003 and above. vss is a windows infrastructure composed of three participants:

requestors - management applications that initiate backup and recovery

writers - applications that own the data

providers - storage/hardware applications that coordinate the reading and writing of the data to appropriate storage

several leading backup and storage vendors currently provide requestor and provider applications. with the oracle vss writer, customers can reliably back up and recover oracle data in a vss environment, which interoperates with these vendors' components.