Software Ag Usa, Inc.

Other

Terracotta Inc.

Saravanan Subbiah

Steven T Harris

Christopher Dennis

Myron Scott

Chris Dennis

Timothy Wu

Orion D Letizi

Timothy S Eck

Certain example embodiments relate to a highly-concurrent, predictable, fast, self-managed, in-process space for storing data that is hidden away from the garbage collector and its related pauses. More particularly, certain example embodiments relate to improved memory management techniques for computer systems that leverage an off-heap direct-memory data store that is massively scalable and highly efficient. The off-heap store may be provided in connection with a Java-based environment, and garbage collection may be completely or nearly completely avoided for the off-heap store. The off-heap store may be integrated into a tiered storage solution in certain example embodiments.

Off-heap direct-memory data stores, methods of creating and/or managing off-heap direct-memory data stores, and/or systems including off-heap direct-memory data store

Off-heap direct-memory data stores, methods of creating and/or managing off-heap direct-memory data stores, and/or systems including off-heap direct memory data store

Certain example embodiments provide a single pass, reverse chronological approach to write-ahead log recovery, enabling space- and time-efficient the recovery of stored data from large write-ahead logs to a transient storage medium. The techniques described herein can in certain instances enable fast and efficient recovery, even in scenarios where at the time of a failure requiring such a recovery the live log is potentially multiple terabytes or larger in size. Certain example embodiments make use of a filtering mechanism (e.g., involving potentially stateful delete, skip, and/or transaction filters), a key/value property (allowing a live set of data, once identified, to be applied in any arbitrary order), etc. A simplified environment with a small closed set of mutative operations allows for the performing of recovery backwards by scanning the log from the most recent written record backwards in time (and, in other words, finishing with the oldest record).

Systems and/or methods for rapid recovery from write-ahead logs

Technology for sharing data among multiple virtual machines in a cluster of virtual machines is disclosed. Each virtual machine identifies 'managed' objects of an instance of an application running at the virtual machine. The managed objects are objects for which state information is to be replicated at the other virtual machines in the cluster on which other instances of the application are running. Operations performed by an instance of one application which affect the state of managed objects are detected and distributed. A computer-implemented method for maintaining consistent object states at different virtual machines includes receiving managed object state information from a first virtual machine including a first instance of an application; creating a representation of each of the managed objects; and responsive to the received information, communicating state information to at least a second virtual machine on which a second instance of the application is running to replicate the state information at the second virtual machine.

Clustering server providing virtual machine data sharing

Growing community of inventors

San Mateo, CA, United States of America

Saravanan Subbiah