International Business Machines Corporation

John Mark Clifton

Matthew John Fairhurst

Nicholas O'Leary

Alexander Henry Ainscow

Sarvesh S Patel

Kushal S Patel

Jonathan Ian Settle

Christopher B E Beeken

Callum Peter Jackson

Duo Chen

Colin R Jewell

James Mulcahy

Dale Burr

Thomas Van Der Veen

Jack Philip Boad

David Jonathan Richards

Kalpesh Chhajed

Method and system are provided for storage optimization for event streaming for multiple consumers. The method provides an entire event stream for storage in a first tier storage and dynamically determines advance portions of the event stream for at least some of the consumers based on a consumer's position index in the event stream. The advance portions are portions of the event stream that will be consumed next by the consumer and the method provides the advance portions of the event stream for storage in second tier storage that has a higher performance than the first tier storage.

Storage optimization for event streaming for multiple consumers

According to one embodiment, a method, computer system, and computer program product for adjusting tiering based on operation types in a multi-tier storage system is provided. The present invention may include retrieving an extent to be managed and operations associated with the extent; analyzing the operations of the extent to determine an IO pattern associated with the extent; receiving a list of storage devices within the multi-tier storage system; querying each storage device of the storage devices for suitable pattern types; selecting, based on the querying and the IO pattern associated with the extent, a suitable storage device; and transferring the extent to the suitable storage device.

Drive utilization in multi-tiered systems with read-intensive flash

A computer-implemented method, according to one embodiment, includes: detecting that a configuration change for a virtualization layer in a multi-tiered data storage system has been received, and determining whether the configuration change corresponds to a tiering adjustment. In response to determining that the configuration change corresponds to a tiering adjustment, I/O pattern changes are predicted. Moreover, a determination is made as to whether each specific extent is stored in a tier of the multi-tiered data storage system suitable to satisfy the predicted I/O pattern changes which correspond to the respective specific extent. In response to determining that one of the specific extents is stored in a tier of the multi-tiered data storage system which is not suitable to satisfy the predicted I/O pattern changes, the at least one specific extent is migrated to another one of the tiers determined as being suitable to satisfy the predicted I/O pattern changes.

Consideration of configuration-based input/output predictions in multi-tiered data storage system management

An apparatus is operable with a host and a data storage component for controlling expansion of storage, and comprises: an allocating component responsive to a user input for allocating an expanded target storage space to a file system element to thereby make an expanded file system element; a file system metadata component for maintaining file system metadata including metadata for said expanded file system element; a file system I/O component responsive to said file system metadata component for controlling file system I/O between said host and said storage component; and a synchronizing component responsive to said file system metadata component for synchronizing data between a source storage space and said expanded target storage space; wherein said file system I/O component is operable to use said file system metadata component to access said expanded file system element prior to completion of action of said synchronizing component.

Non-disruptive file system element reconfiguration on disk expansion

Storing defined presets for configuration of a storage controller may include providing a storage controller interface to define a preset associated with an action of the storage controller; receiving preset parameter values for the preset via the interface; validating the preset parameter values to check that the preset is valid; storing the preset within the storage controller, and creating one or more preset objects from the preset, the preset object being accessible by the storage controller at run time. The preset may include a human-readable name; an action name indicating to which associated storage controller action the preset applies, and a set of parameter name-value pairs.

Flexibly storing defined presets for configuration of storage controller

A computer node comprises dual hard drives. A method of testing the computer node comprises performing a test of the first hard drive, waiting a specific time period, and performing a test of the second hard drive. Each test comprises isolating the drive being tested, writing data to the drive being tested, removing power from the drive being tested, repowering the drive being tested, and reading data from the drive being tested.

Computer node testing

In one embodiment, a method includes evaluating event history information for each of one or more events associated with a hardware entity against a symptom rule, the symptom rule defining a validity state of a diagnosis. The method also includes identifying contextual information by receiving and inspecting the event history information in response to the symptom rule being satisfied and the diagnosis being validated. An indication of the validity state of the diagnosis is sent to at least one subscriber that has requested a subscription specifically for the diagnosis.

Diagnosing entities associated with software components

In one embodiment, a method includes recording event history information for one or more events associated with an entity; evaluating the event history information for each of the one or more events associated with the entity against a symptom rule, wherein the symptom rule defines a validity state of a diagnosis; issuing a subscription to one or more subscribers, wherein the subscription enables the one or more subscribers to receive diagnosis information; and indicating the validity state of the diagnosis to the subscriber, wherein the recording and the evaluating are performed independently such that the issuing and the event history information and the are substantially decoupled. Other methods are also described, according to various embodiments.

Methods for diagnosing entities associated with software components

In one embodiment, a system includes a recording module adapted for recording event history information for one or more events associated with an entity, an evaluating module adapted for evaluating the event history information for each of the one or more events associated with the entity against a symptom rule, wherein the symptom rule defines a validity state of a diagnosis, an issuing module adapted for issuing a subscription to one or more subscribers, wherein the subscription enables the one or more subscribers to receive diagnosis information, and an indicating module adapted for indicating the validity state of the diagnosis to the subscriber, wherein the recording module and the evaluating module are independent such that the issuing module and the event history information are substantially decoupled. Other systems and computer program products are also described, according to various embodiments.

An apparatus for assigning a device to a network zone comprises a switch component operable to receive an attachment request, port and device name data and device operating characteristics data from the device; and a rules engine operable to acquire the device operating characteristics data from the switch component; the rules engine being operable to apply rules logic to the device operating characteristics data to select a zone for the device. The rules engine may be further operable to apply the rules logic to the port and device name data. The network zone may be a network zone of a fiber channel network.

Apparatus and method for switch zoning via fibre channel and small computer system interface commands

An apparatus is operable with a host and a data storage component for controlling expansion of storage, and comprises: an allocating component responsive to a user input for allocating an expanded target storage space to a file system element to thereby make an expanded file system element; a file system metadata component for maintaining file system metadata including metadata for the expanded file system element; a file system I/O component responsive to the file system metadata component for controlling file system I/O between the host and the storage component; and a synchronizing component responsive to the file system metadata component for synchronizing data between a source storage space and the expanded target storage space.

A method, system, computer program product, and computer program storage device for receiving and processing I/O requests from a host device and providing data consistency in both a primary site and a secondary site, while migrating a SRC (Synchronous Peer to Peer Remote Copy) from a backend storage subsystem to a storage virtualization appliance. While transferring SRC from the backend storage subsystem to the storage virtualization appliance, all new I/O requests are saved in both a primary cache memory and a secondary cache memory, allowing a time window during which the SRC at the backend storage subsystem can be stopped and the secondary storage device is made as a readable and writable medium. The primary cache memory and secondary cache memory operates separately on each I/O request in write-through, read-write or no-flush mode.

Method for migration of synchronous remote copy service to a virtualization appliance

The present invention relates to a method, apparatus or software for processing photographic image data using a photographic recording medium arranged for capturing successive optical images in a series of discrete frames.

Method, apparatus and software for processing photographic image data using a photographic recording medium

A system and method for autonomically monitoring data integrity during logical and physical storage and retrieval of data by a storage device. In one embodiment, the method of the present invention includes scheduling data integrity checking in accordance with an operative input/output (I/O) state of the storage device. The scheduling preferably includes first retrieving an I/O command, such as a read or write command, from a disk interface controller and determining whether or not the I/O command has been pre-marked for data checking. In response to the I/O command not being marked for prescribed data checking, a further determination is made of whether or not data integrity checking is required in association with the object I/O command as specified by scheduler rules. Responsive to determining that a data integrity check is required in association with the I/O command, the I/O command is marked as requiring an associated data integrity check.

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Hertfordshire, United Kingdom

John Mark Clifton