International Business Machines Corporation

Matthew Joseph Anglin

David Maxwell Cannon

Howard Newton Martin

Colin Scott Dawson

Avishai Haim Hochberg

Barry Fruchtman

Mark Alan Haye

James Patrick Smith

Mark L Yakushev

Erick Christian Kissel

Donald Paul Warren, Jr

Ken Eugene Hannigan

Michael G Sisco

Robert S Elder

Michael Allen Kaczmarski

Michael Harry Segapeli

Kevin Patrick Hoyt

Gregory Tad Kishi

Gregory John Tevis

David Gregory Van Hise

Toby Lyn Marek

Arthur John Colvig

Kristopher A Larson

Oliver Augenstein

Jonathan Mark Haswell

Anthony Steve Pearson

William W Chow

Mark Anthony Sovik

James M Showalter

Alexei Kojenov

Douglas Stephen Noddings

Neil Gregory Rasmussen

David Lee Patterson

Robert Michael Nugent

John Viksne

Mark Alan Hayes

Provided are a computer program product, system, and method for replication of versions of an object from a source storage to a target storage. A source retention policy indicates at least one source retention requirement to determine when to expire versions of an object at the source storage and a target retention policy indicates at least one target retention requirement to determine when to expire versions of the object at the target storage. The source and target retention requirements for versions of the object are different. The source retention policy is used to expire at least one version of the object at the source storage to satisfy the at least one source retention requirement. A number of the versions of the object maintained at the source storage and target storage differ due to the different source and target retention requirements.

Replication of versions of an object from a source storage to a target storage

Provided are a computer program product, system, and method for using geographical location information to provision multiple target storages for a source device. A determination is made of a geographical location of the source device and a distance between the source device and each of the target storages and between each pair of target storages. A determination is further made of qualifying k-tuples of the target storages, wherein each k-tuple comprises a group of k target storages to which the source data is to be backed-up. A qualifying k-tuple has one target storage that satisfies a distance requirement with respect to the source device and a distance between any two target storages in the k-tuple satisfies the distance requirement. A selected qualifying k-tuple is indicated to use to backup the source data at the k target storages in the qualifying k-tuple.

Using geographical location information to provision multiple target storages for a source device

Provided are a computer program product, system, and method for considering input/output workload and space usage at a plurality of logical devices to select one of the logical devices to use to store an object. A determination is made of a logical device to store the object based on workload scores for each of the logical devices indicating a level of read and write access of objects in the logical device and space usage of the logical devices. The object is written to the determined logical device.

Considering input/output workload and space usage at a plurality of logical devices to select one of the logical devices to use to store an object

Data objects are replicated from a source storage managed by a source server to a target storage managed by a target server. A source list is built of objects at the source server to replicate to the target server. The target server is queried to obtain a target list of objects at the target server. A replication list is built indicating objects on the source list not included on the target list to transfer to the target server. For each object in the replication list, data for the object not already at the target storage is sent to the target server and metadata on the object is sent to the target server to cause the target server to include the metadata in an entry for the object in a target server replication database. An entry for the object is added to a source server replication database.

Replication of data objects from a source server to a target server

Provided are a computer program product, system, and method for using geographical location information to provision one or more target storages for a source device. A determination is made of a geographical location of the source device and of geographical locations of the target storages. A determination is made of one of the target storages whose distance from the source device based on the geographical locations of the source device and the target storages satisfies at least one distance requirement. A configuration procedure is initiated to configure the source device and the determined target storage to have the source data backed-up from the source device to the target storage over the network.

Using geographical location information and at least one distance requirement to determine a target storage to provision to backup data for a source device

Using geographical location information to provision a target storage for a source device

Provided are techniques for managing backup operations from a client system to a primary server and secondary server. A determination is made at the client system of whether a state of the data on the secondary server permits a backup operation in response to determining that the primary server is unavailable when a force failover parameter is not set. The client system reattempts to connect to the primary server to perform the backup operation at the primary server in response to determining that the state of the data on the secondary server does not permit the backup operation. The client system performs the backup operation at the secondary server in response to determining that the state of the secondary server permits the backup operation.

Managing backup operations from a client system to a primary server and secondary server

Embodiments of the present invention provide methods, systems, and computer program products for replicating data between redundant sources. In one embodiment, during a reverse replication process, roles of a source system and target system are altered such that the target system controls the replication process. The target system can identify objects to be transferred, build batches of objects for efficient transfer, and transmit the batches of objects to the source system. Accordingly, embodiments of the present invention can reduce inefficient communication between a source system and a target system that might otherwise occur during replication processes controlled by the source system.

Data replication across servers

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Tucson, AZ, United States of America

Matthew Joseph Anglin