International Business Machines Corporation

Anuj Chandra

Subhojit Roy

Miles Mulholland

Komal Shailendra Shah

Imran Imtiaz

Sarvesh S Patel

Kushal S Patel

Subhamay Barui

Kirsty G Rodwell

Jorden Luke Allcock

A remote copy relationship is maintained between a local computational device and a remote computational device for a first storage volume and a second storage volume. The local computational device transmits information to the remote computational device, wherein the information indicates that there are no deduplication matches between the first storage volume and the second storage volume in the local computational device, and wherein the remote computational device is configured to avoid scanning for deduplication matches between a remote copy of the first storage volume and a remote copy of the second storage volume based on the information that is transmitted.

Limiting deduplication search domains

A method, system, computer program product and computer program for managing a storage system, comprising a primary system and a backup system, wherein the backup system is in a copy relationship with the primary system, comprising: in response to a write operation, the write operation comprising first data: calculating a cryptographic value for the first data; scanning a first directory to identify an entry corresponding to the cryptographic value to determine a first set of addresses associated with the write operation; transmitting the first set of addresses to the backup system; and updating the first directory with a first entry for the write operation, the first entry comprising a pointer to the first set of addresses; updating a second directory with a second entry for the write operation, the second entry comprising a pointer to a second set of addresses corresponding to the first set of addresses.

Optimizing deduplication hit-rate in a remote copy environment

A computer-implemented method enables workload scheduling in a storage system for optimized deduplication. The method includes determining dynamic correlations of deduplications between workload processes in a prior time window. Workload processes include one or more tasks with defined execution timing parameters. The method further includes determining deduplication ratios based on the correlations of the deduplications between the workload processes. The method further includes scheduling multiple workload processes based on a highest determined deduplication ratio of the determined deduplication ratios.

Storage system workload scheduling for deduplication

In one embodiment, a method includes determining at least one characteristic of a plurality of ports on an individual basis. The plurality of ports are hosted by a target system and configured to send and receive data. The method also includes creating port groupings, each port grouping including one or more of the plurality of ports. Ports are grouped together in a single port grouping based on at least one shared characteristic of individual ports in the single port grouping. In addition, the method includes receiving, from an initiator port, a target discovery request at a target port of the plurality of ports. Also, the method includes determining which particular port grouping the target port belongs to. Moreover, the method includes sending information about all ports in the particular port grouping to the initiator port in response to receiving the target discovery request from the initiator port.

Storage target discovery in a multi-speed and multi-protocol ethernet environment

A computer-implemented method according to one embodiment includes identifying that a direct communications connection exists between a first device and a second device; and optimizing information transmitted between the first device and the second device over the direct communications connection.

Optimizing information transmitted over a direct communications connection

A computer-implemented method according to one embodiment includes establishing, by an initiator, a discovery session type. A request is sent by the initiator for identifying a target. The request includes an identity key value pair that specifies at least one target identity, and a target characteristic key value pair that specifies a target characteristic. A response is received by the initiator from a target matching the key value pairs. The response includes path information of the target. In response to receiving the response the target is connected to by the initiator using the path information. A computer program product for establishing a connection between an initiator and a target according to one embodiment includes a computer readable storage medium having program instructions embodied therewith. The program instructions are readable and/or executable by an initiator to cause the initiator to perform the foregoing method.

Growing community of inventors

Pune, India

Anuj Chandra