Combining virtual mapping metadata and physical space mapping metadata

摘要

For combining virtual mapping metadata and physical space mapping metadata in a storage system by a processor device in a computing environment, data and metadata are maintained into separate virtual streams. The separate virtual streams include a metadata stream for the metadata and a data stream for the data. Information of a mapping of logical data to a location on the data stream and a current state of unused spaces in the data stream is linearly distributed within the metadata stream.

主权项

1. A method for combining virtual mapping metadata and physical space mapping metadata in a storage system by a processor device in a computing environment, the method comprising:
maintaining data and metadata into separate virtual streams, wherein the separate virtual streams include a metadata stream for the metadata and a data stream for the data; linearly distributing within the metadata stream information of a mapping of logical data to a location on the data stream and a current state of unused spaces in the data stream; determining the metadata for each input/output (I/O) operation received using a linear function operation, wherein the function operation is an offset of the metadata in the metadata stream that is equal to the I/O operation multiplied by a maximal metadata ratio, allocating the metadata on the metadata stream and dividing the metadata stream into fixed size block that is responsible for describing a size of a logical space, wherein the logical space is equal to one divided by the maximal metadata ratio, and determining if the metadata has been previously loaded.