International Business Machines Corporation

Martin Tross

Aviad Zlotnick

Gail Andrea Spear

William Frank Micka

Michael Edward Factor

Shachar Fienblit

Olympia Gluck

Joseph S Hyde, Ii

Thomas Charles Jarvis

Rhonda L Childress

Itzhack Goldberg

Ramakrishnan Rajamony

Lorraine M Herger

Eric Van Hensbergen

Amiram Hayardeny

Ziv Rafalovich

Eric Richard Kern

Warren Keith Stanley

Robert Francis Bartfai

Theodore Brian Vojnovich

Sam Clark Werner

Asaf Tzadok

Andrew Boyce McNeill, Jr

Gregory William Dake

Dan S Chevion

Ben-Ami Yassour

Yaakov Navon

Avi Teperman

Israel Berger

Eugene Wallach

Andrei Heilper

Irit Dolev

Dan Chevion

A method for managing a data storage system includes maintaining a record on a secondary storage subsystem, which is predictive of locations to which data are to be written on a primary storage subsystem by a host processor. Upon receiving at the primary storage subsystem, from a host processor, the data to be written to a specified location, if the specified location is not included in the record, the primary storage subsystem sends to the secondary storage subsystem so as to cause the secondary storage subsystem to update the record. The primary storage subsystem signals the host processor that the data have been stored in the data storage system responsively to receiving the data and to receiving an acknowledgment from the secondary storage subsystem indicating that the record has been updated.

Storage disaster recovery using a predicted superset of unhardened primary data

Failover of blade servers in a data center including powering off a failing blade server by a system management server through a blade server management module ('BSMM') managing the failing blade server, the failing blade server characterized by a machine type, one or more network addresses, and one or more storage addresses, the addresses being virtual addresses; identifying, by the system management server from a pool of standby blade servers, a replacement blade server, the replacement blade server managed by a BSMM; assigning, by the system management server through the BSMM managing the replacement blade server, the one or more network addresses and the one or more storage addresses of the failing blade server to the replacement blade server, including enabling in the replacement blade server the assigned addresses; and powering on the replacement blade server by the system management server through the BSMM managing the replacement blade server.

Failover of blade servers in a data center

A computer implemented method, data processing system, and computer program product for automatically aggregating entities via a profile-driven management. A profile is created, wherein the profile includes a set of search criteria comprising one or more server attributes. A list of attributes of each server in the data processing system is obtained. Servers in the plurality of servers whose attributes meet the set of search criteria specified in the profile are then grouped to form a profile group. Once the servers are grouped into a profile, an administrative action may be performed on all of the servers in the profile group simultaneously.

Service delivery using profile based management

A computer implemented method, data processing system, and computer program product for nominating rules or policies for promotion through a policy hierarchy. An administrator at any level in a policy hierarchy may create a rule or policy. The administrator may then nominate the rule or policy for inclusion in a next higher level in the policy hierarchy. The rule or policy is evaluated at the next higher level. Responsive to an approval of the next higher level to include the rule or policy in the jurisdiction of the next higher level, the rule of policy is provided to all users under the jurisdiction. The nominating, evaluating, and providing steps may then be repeated for each higher level in the policy hierarchy.

Rule and policy promotion within a policy hierarchy

Disclosed is a method, system, and program for managing metadata in cache. A first policy is used to determine when to remove data from a primary cache, and a second policy is used to determine when to remove data from a metadata cache.

Method, system, and program for improved throughput in remote mirroring systems

Provided are a method, system, and program for accessing a resource. Requests are generated to access a resource in a first access mode and a second access mode. The requests are processed to access the resource in the second mode before processing at least one request to access the resource in the first access mode. The processing of the requests to access the resource in the first access mode is delayed for a time period after processing all the requests to access the resource in the second access mode in order to wait to receive a subsequent request to access the resource in the second access mode.

Method, system, and program for maintaining a copy relationship between primary volumes and corresponding secondary volumes

A method for managing a data storage system includes maintaining a record predictive of locations to which data are to be written on the primary storage subsystem by a host processor. Upon receiving data from the host processor at the primary storage subsystem to be written to a specified location on the first non-volatile storage media, if the specified location is not included in the record, the record is updated responsively to the specified location. The primary storage subsystem signals the host processor that the data have been stored in the data storage system responsively to receiving the data and, if the specified location was not included in the record, responsively to updating the record.

Asynchronous data mirroring with look-ahead synchronization record

A method for storing data received from a host processor at a primary storage subsystem in a data storage system includes writing the data to a first volatile cache memory in the primary storage subsystem and copying the data from the primary storage subsystem to a secondary storage subsystem. The second subsystem writes the copied data to a second volatile cache memory and returns an acknowledgment to the primary storage subsystem responsively to writing the copied data to the second volatile cache memory and prior to saving the data in the second non-volatile storage media. The primary storage subsystem signals the host processor that the data have been stored in the data storage system responsively to the acknowledgment from the secondary storage subsystem.

Remote data mirroring with acknowledgment upon writing copied data to volatile cache memory

For a technique for maintaining consistency of data, one or more blocks of data identified by a first structure are copied to form a consistent set of data. While not acknowledging completion of write requests to any blocks of data, a second structure is created, wherein the second structure indicates which blocks of data are modified while the consistent set of data is being formed.

Method, system, and program for asynchronous copy

A method for managing a data storage system includes maintaining a record predictive of locations to which data are to be written on a first storage medium by a host computer. Upon receiving a write command from the host computer directed to storing specified data at a specified location on the first storage medium, if the specified location is not included in the record, the record is updated responsively to the specified location. A signal is sent to the host computer that the specified data have been stored in the data storage system responsively to storing the specified data and, if the specified location was not included in the record, responsively to updating the record. The specified data are copied to the second storage medium responsively to the record, and are stored in the specified location on both the first and second storage media.

Appliance for asynchronous data storage mirroring

A method for managing a data storage system includes copying data stored on a first storage subsystem to a second storage subsystem in an asynchronous mirroring process. A record is maintained on the second storage subsystem, indicative of locations at which the data have been updated on the first storage subsystem and have not yet been copied to the second storage subsystem. Upon receiving at the second storage subsystem, from a host processor, a request to access the data stored at a specified location on the data storage system, if the specified location is included in the record, the second storage subsystem initiates a synchronous transfer of the data at the specified location from the first storage subsystem.

Storage system with symmetrical mirroring

Disclosed is a method, system, and program for reducing an mount of data transferred. Indicators of sub-blocks modified for a block of data since the block of data was last sent to remote storage are maintained until the block of data is demoted. The maintained indicators are used to identify sub-blocks on the block of data for transfer to the remote storage. Disclosed is a method, system, and program for managing metadata in cache. A first policy is used to determine when to remove data from a primary cache, and a second policy is used to determine when to remove data from a metadata cache.

A method for automatic sorting includes receiving an item in a sequence of items to be sorted, each such item marked with a respective machine-readable identifying code and with respective characters in a location relative to the code that varies from one item to another in the sequence. A position of the code on the item is determined and, responsive to the position of the code, the location of the characters on the item is found. The characters are processed to determine a destination of the item.

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Haifa, Israel

Martin Tross