International Business Machines Corporation

Ashish Chaurasia

Subhojit Roy

Sandeep R Patil

Riyazahamad Moulasab Shiraguppi

Prasenjit Sarkar

Abhishek Jain

Venkateswararao Jujjuri

Nilesh Prabhakar Bhosale

Venkateswara Rao Puvvada

Saket Kumar

Karrthik Kalaga Gopalakrishnan

Ujjwal Lanjewar

A method for minimizing data transfer and storage utilization on cloud object storage systems is disclosed. In one embodiment, such a method replicates a file from a production system to a cloud object storage system. The method determines whether a number of hard links associated with the file is greater than one. In the event the number is greater than one, the method creates, on the cloud object storage system, a special object for the file and associates the file with the special object. Upon creating a hard link on the production system in association with the file, the method replicates the hard link from the production system to the cloud object storage system without replicating data associated with the file. A metadata reference to the special object is added to the hard link on the cloud object storage system. A corresponding system and computer program product are also disclosed.

Minimizing data transfer and storage utilization on cloud object storage systems

A computer-implemented method according to one embodiment includes determining a classification associated with an instance of data, determining a vulnerability level of a first storage system at which the instance of data is currently located, and conditionally migrating the instance of data from the first storage system to a second storage system, based on the classification associated with the instance of data and the vulnerability level of the first storage system.

Selecting data storage based on data and storage classifications

A computer reduces data fragmentation on a thin provisioned storage system. The computer receives a storage request. The computer determines a virtual storage size based at least in part on the received storage request. The computer creates an assigned virtual list that includes a list of reserved physical storage locations associated with the storage request. The computer further receives a WRITE command, and responsive to the WRITE command, allocates storage based at least in part on the created assigned virtual list.

Performance improvements for a thin provisioning device

Embodiments of the invention relate to configuring a virtualization controller in SAN data storage system without disrupting I/O operations. One aspect of the invention concerns a method that comprises establishing a first data path between a host and a storage controller in the same communication zone wherein the storage controller comprises storage devices for storing data; adding a virtualization controller to the zone wherein the virtualization controller maps the storage devices to virtual volumes and establishes a second data path between the host and the storage devices through the virtual volumes; removing the first data path in response to the host detecting the second data path; and performing I/O operations between the host and the storage devices through the second data path.

Non-disruptive configuration of a virtualization controller in a data storage system

A system and method for providing access in a distributed filesystem. The disclosure describes systems and methods for providing access to filesystem objects in a distributed filesystem (DFS). In one implementation, access to filesystem objects in the DFS can be restricted to only authenticated users and client devices. To this end, the client devices of the DFS can be divided into trusted and non-trusted clients, and further access can be denied to non-trusted clients. Concepts of trusted computing can be utilized to obtain trusted clients. New clients added to the system can be added as non-trusted clients. Further, access can be restricted by extending the file access permissions to include additional bits that can control access to non-trusted clients. In certain situations, the owner of the object can be allowed access to the object from a non-trusted client.

Providing access in a distributed filesystem

Embodiments of the invention relate to configuring a virtualization controller in SAN data storage system without disrupting I/O operations. One aspect of the invention concerns a method that comprises establishing a first data path between a host and a storage controller in the same communication zone wherein the storage controller comprises disks for storing data; adding a virtualization controller to the zone wherein the virtualization controller maps the disks to virtual volumes and establishes a second data path between the host and the disks through the virtual volumes; removing the first data path in response to the host detecting the second data path; and performing I/O operations between the host and the disks through the second data path.

Growing community of inventors

Pune, India

Ashish Chaurasia