Netapp, Inc.

Sateesh Kumar Pola

Kayuri Hasmukh Patel

Qinghua Zheng

Kevin Daniel Varghese

Sumith Makam

Sharmi Suresh Kumar Nair

Mihir Gorecha

Yuvraj Ajaykumar Patel

Mrinal K Bhattacharjee

Sreenath Korrakuti

Jagadish Vasudeva

Sushrut Bhowmik

Vinay Kumar B C

Arun Kumar Pandey

Systems and methods for reducing the provisioned storage capacity of a disk or aggregate of disks of a storage appliance while the storage appliance continues to serve clients are provided. According to one embodiment, the size of the aggregate may be reduced by shrinking the file system of the storage appliance and removing a selected disk from the aggregate. When an identified shrink region is less than the entire addressable PVBN space of the selected disk, the file system may be shrunk by relocating valid data from the shrink region of the selected disk to one or more regions outside of the shrink region, mirroring data of the selected disk from outside of the shrink region to a smaller disk added to the aggregate, and then removing the selected disk after the mirrors are in sync, thereby reducing the provisioned storage capacity of the aggregate by the difference in size between the selected disk and the smaller disk.

Reducing provisioned storage capacity of an aggregate of a storage appliance

Systems and methods for reducing the provisioned storage capacity of a disk or aggregate of disks of a storage appliance while the storage appliance continues to serve clients are provided. According to one embodiment, the size of the aggregate may be reduced by shrinking the file system of the storage appliance and removing a selected disk from the aggregate. When an identified shrink region includes the entire addressable PVBN space of the selected disk, the file system may be shrunk by relocating valid data from the selected disk elsewhere within the aggregate. After the valid data is relocated, the selected disk may be removed from the aggregate, thereby reducing the provisioned storage capacity of the aggregate by the size of the selected disk.

Techniques are provided for storage tier verification checks. A determination is made that a mount operation of an aggregate of a set of volumes stored within a multi-tier storage environment has completed. A first metafile and a second metafile are maintained to track information related to the storage of objects of a volume of the aggregate within a remote object store that is a tier of the multi-tier storage environment. A distributed verification is performed between the first metafile and the second metafile to identify an inconsistency. Accordingly, the first metafile and the second metafile are reconciled to address the inconsistency so that storage information within the first metafile and the second metafile are consistent.

Storage tier verification checks

Systems and methods for supporting dynamic disk growth within a virtual storage appliance are provided. According to one embodiment, a portion of a logical size of respective hyperscale disks provided by a hyperscaler are provisioned for use by a virtual storage system as backing for respective file system disks. To accommodate growth, block numbers for the file system disks are pre-allocated within a sparse space of a contiguous sequence of block numbers corresponding to a number of blocks represented by the logical size. Metadata is maintained for the file system disks regarding a range of the pre-allocated block numbers that are available for use. Responsive to a triggering condition, the provisioned portion of a hyperscale disk is increased and subsequently, responsive to detecting a change in a size of the hyperscale disk by the virtual storage system, a size of the corresponding file system disk is updated within the metadata.

Increasing provisioned storage capacity by means of growing underlying disks within a virtual storage appliance

Presented herein are methods, non-transitory computer readable media, and devices triggering a metadata recovery process within a network storage system, which include: dividing metadata into metadata segments, wherein each of the metadata segments is tasked to perform a specific file system operation function, validating each of the metadata segments during the specific file system operation function; upon failure to validate at least one of the metadata segments, triggering an automatic repair process while maintaining the operation function tasked to the metadata segment, and upon finalizing the automatic repair process, resuming the specific file system operation function tasked to the metadata segment.

Growing community of inventors

Bengaluru, India

Sateesh Kumar Pola