International Business Machines Corporation

Thanh Tan Pham

Jyh-Herng Chow

Ting Yu Leung

Josephine Miu Cheng

I-Shin Andy Wang

Umesh Deshpande

HongHai Shen

Sandeep R Patil

Huan Wang

Sangeetha Seshadri

Paul Henri Muench

Yang Zhao

Robert Michael Rees

Hai Tao Zhang

Binayak Dutta

Xiang Zhan

Kai Ding

Kar Ming Tang

A computer-implemented method (CIM), according to one embodiment, includes simulating placement of a volume group on a first potential target storage system, and determining a first performance limit for the first potential target storage system based on the simulating. The method further includes predicting a duration the first potential target storage system can host the volume group without performance degradation, based on the first performance limit, and outputting a notification to a customer device, where the notification includes an indication of the predicted duration. A computer program product (CPP), according to another embodiment, includes a set of one or more computer-readable storage media, and program instructions, collectively stored in the set of one or more storage media, for causing a processor set to perform the foregoing method.

Performance-based migration for a volume group

An embodiment for a method of cost-aware tiering for data storage. The embodiment may detect data to be stored in one or more storage systems and gathering access and usage information. The embodiment may maintain a first data structure including periods of activity below a defined threshold for the detected data, and a common data structure to identify and track application-wide data patterns. The embodiment may gather static pricing information and context pricing information for the one or more storage systems and calculate a tiering threshold corresponding to a continuous period of activity below a second defined threshold required for which local storage costs exceed a tiering cost. The embodiment may calculate for inactive data segments, probabilities of the inactive data segments remaining inactive for a duration that exceeds the calculated tiering threshold. The embodiment may calculate a risk score and generate a tiering list for storing the data.

Cost-aware tiering for data storage

Handbag set

A system for package pre-fetching for a remote program installation includes a service node having a processor, a computing node type database, and a cache, the service node being configured to receive at least one package request for a package required for an installation of an operating system and at least one peripheral application thereof from a computing node, and determine a package request sequence by which the computing node issues the at least one package request according to a type of the computing node. In another embodiment, a method includes receiving a package request from a computing node, and determining a package request sequence by which the computing node issues at least one package request according to a type of the computing node, so as to pre-read a subsequent package into a cache before the computing node issues a request for the subsequent package.

Service node, network, and method for pre-fetching for remote program installation

An index structure for use by a database management system comprises a variant of a Patricia tree, wherein each node stores a column value that identifies a specified column of the constructed n-column search key that is used to determine a next path taken through the tree, a null value N that specifies whether a null value or an actual data value of the specified column of the constructed n-column search key is used to determine the next path taken through the tree, and a position value that specifies a portion of the specified column from the constructed n-column search key to be used to determine the next path taken through the tree when the actual data value of the specified column of the constructed n-column search key is used to determine the next path taken through the tree.

Efficient implementation of an index structure for multi-column bi-directional searches

A method, apparatus, and article of manufacture for a computer implemented modification system for supporting localized data changes in a computer. A change is executed to data in a computer having a local database. The change is performed by the computer to modify data in the local database stored within a data storage device at the computer. The change is indicated as being global. When the local database on the computer is synchronized with a main database on another computer, only global changes are transmitted from the local database to the main database.

Modification system for supporting localized data changes in a mobile device

Provided is a method, system, and program for accessing rows of data from a base table satisfying a search criteria. An initial request to access rows in the base table is received, including the search criteria specifying predicates for one or more columns in the base table. A data structure is generated to include information on qualifying base table rows that satisfy the search criteria. Notification is provided that the qualifying base table rows are accessible before information on all the qualifying base table rows is included in the data structure. A request is then received for one qualifying base table row. A determination is made as to whether the data structure includes information on the requested qualifying base table row. If so, the information in the data structure is used to provide access to the requested qualifying base table row.

Method, system, and program for accessing rows in one or more tables satisfying a search criteria

The present invention discloses a method, apparatus, and article of manufacture for generating a database application. In accordance with the present invention, a features list is built for the database application. The features list contains user-selected functions. The database application is dynamically configured based on the built features list.

Growing community of inventors

San Jose, CA, United States of America

Thanh Tan Pham