Patent ID: 8326897
Filing Date: 2012-12-04
Classification: G06F

Abstract:
1. A system in communication with data storage, for storing data, and comprising: a first log structured data storage area storing data in a storage device, wherein the first log structured data storage area includes a first portion of a segment data area in the storage device to store user data; a first log structured data storage system operable with the first log structured data area to store the data in the first log structured data area; a second log structured storage area in the storage device storing metadata for the data in the first log structured data storage area, wherein the second log structured data storage area for storing the metadata is nested within the first log structured data storage area, and wherein the second log structured data storage area includes a track data area and a second portion of the segment data area to provide a virtual track data area in which the second log structured storage system allocates the physical storage to store the metadata for the data; and a second log structured storage system operable with the second log structured storage area, wherein the second log structured storage system allocates address space in the second log structured storage area for the metadata on demand when the first log structured storage system requires the allocation of address space for metadata for data the first log structured storage system stored in the first log structured storage area.