Netapp, Inc.

William Arthur Gutknecht

Ananthan Subramanian

Kevin Daniel Varghese

Daniel David McCarthy

Mrinal K Bhattacharjee

Abdul Basit

Ganga Bhavani Kondapalli

Christopher Clark Corey

Yash Hetal Trivedi

Travis Callahan

Andrew Zhu

Swaroop Vikram Choudhari

Chad Edmund Schneider

Techniques are provided for failing over an aggregate from one file system instance to a different file system instance of a distributed scale-out storage system. The aggregate may be stored within distributed storage that is accessible to a plurality of file system instances of the distributed scale-out storage system. When the aggregate is failed over from a first file system instance to a second file system instance, the first file system instance may still have a valid read lease that allows the first file system instance to serve client I/O, directed to the aggregate, using a cache. In order to prevent the first file system instance from serving stale data from the cache before the read lease expires, state machines and a set of control data are used to ensure that the second file system instance attaches to the aggregate only after the read lease has expired.

Aggregate failover for a distributed scale-out storage system

Presented herein are methods, non-transitory computer readable media, and devices for allocating resources to a particular volume and triggering a consistency point based on the amount given to each volume, thus providing dynamic consistency point triggers. Methods for providing dynamic consistency point triggers are disclosed which include: determining a volume's capacity to utilize resources based on the volume's performance; receiving an allocation of the divided resources based on total system resources available within the storage system and the volume's performance; and triggering a consistency point upon exhausting a threshold percentage of the received/allocated resources.

Adaptive, self learning consistency point triggers

Growing community of inventors

Greensboro, NC, United States of America

William Arthur Gutknecht