公开(公告)号：US20170177224A1

公开(公告)日：2017-06-22

申请号：US14975971

申请日：2015-12-21

Applicant: Oracle International Corporation

Inventor： Frederick S. Glover ,  Mark Longo ,  Joshua Smith

IPC: G06F3/06

CPC classification number: G06F3/0604 ,  G06F3/0608 ,  G06F3/061 ,  G06F3/0631 ,  G06F3/0647 ,  G06F3/0649 ,  G06F3/0653 ,  G06F3/0665 ,  G06F3/0685

Abstract: Techniques are provided for efficiently managing multi-tier storage systems with multiple types of storage class tiers encompassed in a single tiered range volume. In an embodiment, a storage manager creates a first virtual volume, where the storage manager exposes to a first tiered range volume client a first virtual address range for the first virtual volume that represents logical addresses of data blocks within storage portions from at least two storage class tiers of a set of multiple storage class tiers. Each storage portion represents an allocated range from a storage class tier. A storage class tier represents a set of multiple storage devices. The storage manager maintains a storage map of storage portions from multiple storage class tiers to the first virtual address range within the first virtual volume which includes mapping a first virtual address to a first logical address within a first storage portion from a first storage class tier and mapping a second virtual address to a second logical address within a second storage portion from a second storage class tier. A tiered range volume client of the first virtual volume stores a first data block at a first address within the first storage portion. Then the storage manager adds a third storage portion from a third storage class tier to the first virtual volume that maps to a third allocated range, where the third allocated range of the first virtual volume covers at least a portion of the first allocated range, including the first address where a first data block is stored. When adding a third storage portion, the storage manager modifies the storage map to map the first virtual address for the first data block to a location within the third storage portion. The storage manager then moves the first data block to the third storage portion within the third storage class tier that corresponds to a location corresponding to the first address within the third storage portion.