Jerrold (Jerry) Heyman

• PhD
• Level 3 Technical Support Engineer at DDN

A method, system and computer program product for controlling an access to a data resource are disclosed. According to an embodiment, a method for controlling an access to a data resource comprises: communicating a request for the access to the data resource from a requester to an owner of the data resource for validation, the communicating being i...

The present disclosure describes a technique for performing an efficient deduplication of compressed source data. The techniques may reduce the required storage footprint required for deduplication of compressed data. In order to reduce the storage size required, the system may perform additional decompression/recompression processes by identifying...

Systems and methods are disclosed that advertise and expose a SCSI disk device type to a client computer or virtual machine, the disk device type acting as a transport for SCSI commands to/from a storage appliance over a Fiber Channel network. Each SCSI command is transported in one or more Fiber Channel frames. A virtual machine can write data to...

Techniques for implementing software licensing in a massive parallel processing environment on the basis of the actual use of licensed software instances are disclosed. In one embodiment, rather than using a license server or a node-locked license strategy, each use of a licensed software instance is monitored and correlated with a token. A store o...

Embodiments of the invention relate to a message based scheduling tool employed to function with an electronic calendar. As messages are transmitting between clients, a tool is employed to parse the messages to search for one or more string(s) of characters characteristic of a meeting. Based upon these characteristics and the parsing, the electroni...

Responsive to a request to invoke a given virtual machine (VM) instance, a base VM instance corresponding to a number of VM instances, including the given VM instance, is retrieved. A VM change file particular to just the given VM instance is also retrieved. The VM change file indicates how the given VM instance varies from the base VM instance. Th...

Responsive to a request to invoke a given virtual machine (VM) instance, a base VM instance corresponding to a number of VM instances, including the given VM instance, is retrieved. A VM change file particular to just the given VM instance is also retrieved. The VM change file indicates how the given VM instance varies from the base VM instance. Th...

A method, system and computer program product for controlling an access to a data resource are disclosed. According to an embodiment, a method for controlling an access to a data resource comprises: communicating a request for the access to the data resource from a requester to an owner of the data resource for validation, the communicating being i...

Computational fluid dynamics is an increasingly important application domain for computational scientists. In this paper, we propose and analyze optimizations necessary to run CFD simulations consisting of multibillion-cell mesh models on large processor systems. Our investigation leverages the general industrial Navier–Stokes CFD application, Code...

A scheduling system includes a client calendar application that a meeting organizer employs to send a request for free time form to prospective participants of a future meeting via email. The client calendar application receives completed request for participant free time forms back from the prospective participants via email. The client calendar a...

A calendar system includes a calendar requester client and a calendar owner client that couple to a calendar server via one or more networks therebetween. In one embodiment, when the calendar server denies a particular calendar requester access to the calendar owner's calendar, the calendar server transmits a denial notice to the calendar owner and...

Computational Fluid Dynamics (CFD) is an increasingly important application domain for computational scientists. In this paper, we propose and analyze optimizations necessary to run CFD simulations consisting of multi-billion-cell mesh models on large processor systems. Our investigation leverages the general industrial Navier-Stokes open-source CF...

Our investigation leverages the general industrial Navier‐Stokes open‐source Computational Fluid Dynamics (CFD) application, Code_Saturne, developed by Électricité de France (EDF). We deal with how to take advantage of the emerging processor features such as many‐cores, Simultaneous Multi‐Threading (SMT) and Thread Level Speculation (TLS), through...

Migrating applications from a Linux cluster to IBM’s Blue Gene/P can be a beneficial effort, but it is not an entirely painless effort. The more Open Source Software (OSS) that the application is dependent upon. This is because Blue Gene/P does not come with the OSS that is installed with any standard Linux distribution. Additionally, as Blue Gene/...

Writing transportable code is always desireable. Using extensions and enhancements implemented by the manufacturer does not help portability, nor does the use of specific system calls unique to that particular environment.The goal of this article is to show the converse implementation described by Herbert Mayer[1]. The transportation problems are s...