Hewlett Packard Enterprise Development LP

Padmanabhan Selvakumarapalayam Nagarajan

Dinesh Venkatesh

Manny Ye

Rajesh Kumar Chaurasia

Padmagandha Panigrahy

Franklin George

Anand Satish Phatak

Some examples relate to performing application-defined object logging through a file system journal. In an example, a file system may determine during execution of an operation for an application whether a callback function is specified for the operation. In response to the determination, file system may invoke the callback function. File system may receive an object defined by the application. File system may link a copy of the object with a file system transaction associated with the operation in a journal of file system. File system may determine whether file system transaction is committed. In response to the determination, file system may write a copy of the object from the journal to an event log file. File system may allow the application to determine whether file system transaction is committed by enabling access to the event log file.

Application-defined object logging through a file system journal

In some examples, a system determines, based on information relating to access of objects in storage segments by requester devices, an affinity between access devices and the storage segments that are managed by respective controllers of a plurality of controllers, the access devices comprising the requester devices or the controllers. The system selects, based on the affinity between the access devices and the storage segments, a controller of the plurality of controllers for serving requests of a first requester device of the requester devices to access objects.

Selecting controllers based on affinity between access devices and storage segments

Growing community of inventors

Andover, MA, United States of America

Padmanabhan Selvakumarapalayam Nagarajan