International Business Machines Corporation

Trinh Huy Nguyen

Kevin L Miner

Michael Koester

Robert J Reese

Michael John Mayfield

Michael Thomas Vaden

Carrie J Van Noorden

Harshpreet Singh

Thomas M Brey

William Wu Shen

Matthew A Krygowski

Bard Allen Doster

Arthur J Sutton

Bruce L McGilvray

Tan Q Nguyen

Camvu Pham

Steven Huntington

Source code routines are generated for storage management in a storage code development management tool. A script that includes the source code routines is generated. The storage code development management tool receives indications based on an execution of an object code generated via execution of the script. The storage code development management tool modifies the source code routines based on the received indications.

Source code development interface for storage management

In one general embodiment, a computer-implemented method includes identifying a data dump and a predefined data structure, parsing the predefined data structure to determine one or more identifiers within the predefined data structure, determining that a match exists between one or more elements of the data dump and the one or more determined identifiers of the predefined data structure, and formatting the data dump utilizing the predefined data structure, in response to the determining.

Data dump formatting utilizing dynamically created control structures

A computer-implemented method according to one embodiment includes outputting an interface, receiving a first input and parsing contents of the first input. It is determined whether the first input includes the instances of information: a type of modification that is to be performed, a program that is to be incorporated in the performing of the modification, and a target system on which the modification is to be performed. In response to a determination that the first input does not include one or more of the instances of information, a request is output. In response to a determination that the first input includes the instances of information, a process is performed. The process includes correlating the instances of information to a script file and performing the modification in accordance with the instances of information of the first input. The process further includes collecting status information and outputting the status information.

Interface that enables streamlined user-friendly initiation/control of modifications and/or initial program loading (IPL) of a target system

A storage controller receives a command to delete a dataset stored in a first set of storage volumes controlled by the storage controller. In response to receiving the command, a determination is made as to whether an indicator has been enabled to protect the dataset against an accidental deletion. In response to determining that the indicator has been enabled, the dataset is copied from the first set of storage volumes to a second set of storage volumes controlled by the storage controller. In response to completion of the copying of the dataset from the first set of storage volumes to the second set of storage volumes, the command to delete the dataset stored in the first set of storage volumes is executed.

System managed facilitation of backup of dataset before deletion

A computer-implemented method according to one embodiment includes receiving a request to initialize a storage device, the request including a volume serial number associated with the storage device, identifying a size of the storage device, where the size is indicated within the request, determining a size of a table of contents and a location for the table of contents within the storage device, based on the identified size of the storage device, selecting a type of the table of contents from a plurality of different types, based on the identified size of the storage device, and automatically initializing the storage device, including creating the table of contents, reserving a physical area of the storage device for the table of contents using a physical extent, and inserting the table of contents into the storage device, where the table of contents has the determined size of the table of contents, the determined location for the table of contents, and the selected type of the table of contents.

Dynamically managing a table of contents

A computer-implemented method according to one embodiment includes receiving a request to initialize a storage device, identifying a size of the storage device to be initialized, determining a size of a table of contents and a location for the table of contents within the storage device, based on the identified size of the storage device to be initialized, determining a type of the table of contents; and initializing the storage device, utilizing the determined size of the table of contents, the determined location for the table of contents, and the determined type of the table of contents.

According to one embodiment, a debugging tool includes a processor and logic, that when executed by the processor, causes the processor to: receive a Volume Table of Contents (VTOC)/INDEX data set for a first VTOC/INDEX data of a remote system, create second VTOC/INDEX data (which is a replicated version of the first VTOC/INDEX data of the remote system) from the VTOC/INDEX data set, execute a second scenario (which is a replicated version of a first scenario that was executed on the remote system using the first VTOC/INDEX data that caused the error) using the second VTOC/INDEX data to reproduce an error, and set up trace points in the second VTOC/INDEX data to start a debugging session while executing the second scenario using the second VTOC/INDEX data. Other systems, methods, and computer program products are also described according to various other embodiments.

Methods and systems for troubleshooting remote systems through recreation of remote system scenarios

Within a data processing system implementing L1 and L2 caches and stream filters and buffers, prefetching of cache lines is performed in a progressive manner. In one mode, data may not be prefetched. In a second mode, two cache lines are prefetched wherein one line is prefetched into the L1 cache and the next line is prefetched into a stream buffer. In a third mode, more than two cache lines are prefetched at a time. In the third mode cache lines may be prefetched to the L1 cache and not the L2 cache, resulting in no inclusion between the L1 and L2 caches. A directory field entry provides an indication of whether or not a particular cache line in the L1 cache is also included in the L2 cache.

System and method for indicating that a processor has prefetched data

Within a data processing system implementing L1 and L2 caches and stream filters and buffers, prefetching of cache lines is performed in a progressive manner. In one mode, data may not be prefetched. In a second mode, two cache lines are prefetched wherein one line is prefetched into the L1 cache and the next line is prefetched into a stream buffer. In a third mode, more than two cache lines are prefetched at a time. In the third mode cache lines may be prefetched to the L1 cache and not the L2 cache, resulting in no inclusion between the L1 and L2 caches.

Modified L1/L2 cache inclusion for aggressive prefetch

A method of automatically invoking a recoverable and fault tolerant implementation of the complemented/recomplemented (C/R) error correction method without the assistance of a service processor when an excessive error is detected in main storage (MS) by ECC logic circuits. An excessive error is not correctable by the ECC. These novel changes to the C/R method increase its effectiveness and protect the C/R hardware against random failure. Further, if an excessive error is corrected in a page in MS, an excessive error reporting process is provided for controlling the reporting using a storage map to determine if a previous correction in that page has been reported. If it has been reported, then no further reporting of soft excessive errors is made for that page. A service processor is signaled in parallel to update its persistent copy of the storage map so that on a next initializations of MS the memory map can be restored in the memory. The memory map is used to assist the repair of failing parts of MS, and is reset after MS is repaired.

Growing community of inventors

San Jose, CA, United States of America

Trinh Huy Nguyen