Netapp, Inc.

Keith Allen Bare, Ii

Xin Wang

Richard Parvin Jernigan, Iv

Daniel Tennant

Ying-Hao Wang

Bradley Raymond Lisson

Jonathan Westley Moody

Richard Wight

David Loren Rose

Jonathan Curley

Joseph R Sunday

Kevin Stovall

Bryan Seay

Sathya Murthy

Vivek Srinivasamurthy

Asish Prabhakar Kottala

Approaches and mechanisms for cloning a file are described. A first node requests a clone of a file at a time when it also requests an exclusive delegation of the original file from a second node where the original file is stored. The second node marks the original file as delegated to the first node and the second node records an intent to create the clone file and a delegation record for the clone file. The second node creates the clone file. The delegation of and the identity of the clone file are returned to the first node. The first node marks in the delegation record that the clone file was committed in response to modification. If the clone file was committed the delegation is cleared and the clone file is kept, and if the clone file was not committed, the delegation is cleared, and the clone file is deleted.

Remote cloning of files in distributed file systems

Methods, non-transitory machine readable media, and computing devices that more efficiently and effectively manage storage quota enforcement are disclosed. With this technology, a quota ticket comprising a tally generation number (TGN) and a local allowed usage amount (AUA) are obtained. The local AUA comprises a portion of a global AUA associated with a quota rule. The local AUA is increased following receipt of another portion of the global AUA in a response from a cluster peer, when another TGN in the response matches the TGN and the local AUA is insufficient to execute a received storage operation associated with the quota rule. The local AUA is decreased by an amount corresponding to, and following execution of, the storage operation, when the increased local AUA is sufficient to execute the storage operation.

Methods for managing storage quota assignment in a distributed system and devices thereof

Technology is disclosed for a data migration process for a storage server that preserves storage efficiency information. The storage server receives an indication of a group of two or more files and selects among the two or more files a reference file and one or more selected files. The storage server initiates a first migration operation to copy or move the reference file from a source storage server to a destination storage server. The storage server initiates one or more additional migration operations to copy or move the selected files from the source storage server to the destination storage server. At least one of the additional migration operations include a step of transmitting to the destination storage server data blocks of the selected files that are not shared between the reference file and the selected files, but avoid transmitting to the destination storage server the blocks shared with the reference file.

Data migration preserving storage efficiency

Systems, devices, methods, and computer program products are provided for aligning I/O access from a host operating system with the underlying storage system. A storage operating system can be configured to determine, either manually via operator input or automatically, the size of a data offset caused by misaligned I/O access from a host operating system to a first virtual drive. To align I/O access, the storage operating system can initialize a second virtual disk that is partitioned to accommodate the size of the data offset. The storage operating system can copy header information and main data information from the first virtual disk to the second virtual disk as a background process, non-disruptively aligning the I/O access from the host operating system.

Method for non-disruptively aligning I/O access of a host operating system with the underlying storage system

Machine implemented method and system for transferring replicated information from a first storage location managed by a storage operating system at a first storage system node and accessible to a client computing system to a second storage location managed by a second storage system node are provided. A resource pool having a plurality of tokens is maintained for authorizing a replication engine to transfer replicated information from the first storage location to the second storage location. The number of available tokens is increased when traffic due to client requests for accessing the first storage location is less than a first threshold level. The number of available tokens is decreased for reducing transfer of information via the replication engine, when latency in responding to the client requests reaches a second threshold value and the traffic due to client requests reaches the first threshold value.

Method and system for transferring replicated information from source storage to destination storage

Growing community of inventors

Pittsburgh, PA, United States of America

Keith Allen Bare, Ii