International Business Machines Corporation

Damian Trujillo

Gregory E McBride

Theresa Mary Brown

Carol Santich Mellgren

Joshua J Crawford

Nicolas Marc Clayton

Theodore Timothy Harris, Jr

Nedlaya Yazzie Francisco

Anthony J Ciaravella

David Randall Blea

Matthew John Ward

Edgar Xavier Somoza

Pamela A Schull

William J Rooney

Wayne Sun

Marisa F Roberson

A computer-implemented method according to one approach includes identifying an inability to access a first storage volume during a first data replication session, creating a second data replication session including the first storage volume, and removing the first storage volume from the first data replication session.

Managing data replication sessions in response to an inability to access a storage volume

Withdrawal of a point-in-time snap copy relationship or a portion of such a relationship, is managed in a manner which can obviate disruption of consistency groups due to the withdrawal. If the withdrawal request is directed to a subrange of the original snap copy relationship, the snap copy relationship is split by creating one or more point-in-time snap copy relationships over one or more subranges of tracks of the snap copy source. A determination is made as to whether to delay execution of the withdrawal request to temporarily preserve data of the withdrawal range. Disruptions to completion of consistency groups may be avoided by selectively delaying the withdrawal of a snap copy relationship corresponding to the withdrawal subrange. In so far as the host is involved, a host may treat the withdrawal request as immediately granted without delay. Other aspects may be realized, depending upon the particular application.

Point-in-time snap copy withdrawal management

A secondary volume of a remote computational device stores an asynchronous copy of a primary volume of a local computational device. The remote computational device generates a target volume that stores consistent data from the secondary volume, and also generates a plurality of point in time copies at a plurality of instants of time from the target volume. A restoration is made of data in the primary volume to at least one of the plurality of instants of time by using one or more data structures that provide identification of all tracks from the target volume that are to be written to the primary volume for restoring the data in the primary volume.

Reversal of the direction of replication in a remote copy environment by tracking changes associated with a plurality of point in time copies

Embodiments for policy-driven high availability (HA) standby servers in a multi-server high availability (HA) computing environment. Policies may be created that define selected sessions for a user (e.g., important sessions to the user) such that only one or more artifacts of each selected session are replicated to one or more HA standby servers. The one or more artifacts and the one or more policies of a selected session may be synchronized from a primary server to the one or more HA standby servers.

Policy-driven high availability standby servers

One general aspect of asynchronous local and remote generation of consistent point-in-time snap copies in consistency groups in accordance with the present description, is directed to receiving a local-remote pair point-in-time snap copy establish command to establish a local point-in-time snap copy in a local data storage system, and a remote point-in-time snap copy in a remote data storage system. In one aspect, establishment of the remote point-in-time snap copy relationship may be delayed as a function of the state of a consistency group formation process upon receipt of the local-remote pair point-in-time snap copy establish command. As a result, consistency of the local-remote pair of point-in-time snap copies may be realized, notwithstanding an asynchronous relationship between the local and remote storage systems. Other features and aspects may be realized, depending upon the particular application.

Asynchronous local and remote generation of consistent point-in-time snap copies in consistency groups

A secondary volume of a remote computational device stores an asynchronous copy of a primary volume of a local computational device. The remote computational device generates a golden copy that stores consistent data. At least one previous version of the golden copy is stored in a journal volume of the remote computational device.

Preservation of a golden copy that stores consistent data during a recovery process in an asynchronous copy environment

One aspect of the present invention includes adaptive techniques used to render dynamic web content for accessibility software applications, such as screen readers. In one embodiment, an operation for improving webpage browsing with accessibility software includes detecting if an accessibility software application is in use, tracking the position of user focus on the webpage, and presenting information to the user based on the position of user focus on the webpage. In a further embodiment, additional content is rendered on the webpage to screen reader applications, and is placed at the position of the screen reader focus in response to dynamic content appearing or changing on the webpage. This additional content is read by the screen reader to inform the user of the dynamic content change, and/or enable the user to quickly perform a specific action on the webpage.

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Sahuarita, AZ, United States of America

Damian Trujillo