International Business Machines Corporation

Nuodb, Inc.

Dassault Systemes

Oleg Levin

Seth Theodore Proctor

Michael Thomas Rice

Yan Avlasov

Thomas Jonathan Harwood

Moshe Emanuel Matsa

Sonjeev Jahagirdar

Techniques are disclosed for implementing a unified partitioning scheme within distributed database systems to allow a table to be horizontally partitioned and those partitions stored on and serviced by a storage group. A storage group is a subset of storage manager (SM) nodes, and each SM node is configured to persist database data in durable storage. The distributed database system assigns each storage group to a subset of SM nodes. The distributed database system can address each storage group using a symbolic mapping that allows transactions to identify a particular storage group, and to direct read and write operations to a subset of SM nodes servicing that storage group. An administrator can update this mapping on-the-fly to cause the distributed database system to dynamically adjust an implemented partitioning scheme without necessarily interrupting on-going database operations.

Table partitioning within distributed database systems

Processes, devices, and articles of manufacture having provisions to monitor and track multi-core Central Processor Unit resource allocation and deallocation in real-time are provided. The allocation and deallocation may be tracked by two counters with the first counter incrementing up or down depending upon the allocation or deallocation at hand, and with the second counter being updated when the first counter value meets or exceeds a threshold value.

Real-time distributed monitoring of local and global processor resource allocations and deallocations

Growing community of inventors

Acton, MA, United States of America

Oleg Levin