Ixia

Datadirect Networks, Inc.

Jan Olderdissen

Doug Schafer

Craig Robertson

Clifford Lee Hannel

Dan Olster

Dave Fellinger

Roger Standridge

Marko Rauhamaa

Marcel Felix Desdier

An object based file system for storing and accessing objects is disclosed. The file system may be implemented as a method in hardware, firmware, software, or a combination thereof. The method may include receiving from an application program an object write request. A selected storage node on which to store the object may be selected, including identifying a least busy storage node and/or a least full storage node. The object and the object write request may be sent to the selected storage node. A write success message may be received from the selected storage node. The successful writing of the object may be reported to the application program.

Object file system

An object based file system for storing and accessing objects is disclosed. The file system may be implemented as a method in hardware, firmware, software, or a combination thereof. The method may include receiving from an application program an object write request. A selected storage node on which to store the object may be selected, including identifying a least busy storage node and/or a least full storage node. The object and the object write request may be sent to the selected storage node. A write success message may be received from the selected storage node. The successful writing of the object may be reported to the application program. An object identifier and object data may be stored in a database.

There are disclosed processes and systems relating to optimized network traffic generation and reception. Application programs and a protocol stack may share a memory space. The protocol stack may designate available bandwidth for use by an application program. The application programs may store descriptors from which the protocol stack may form payload data for data units.

Protocol stack using shared memory

There are disclosed a computing device, storage medium, and method for generating packets. The computing device may include a memory divided into a kernel space and a user space and a processor coupled to the memory. The processor may execute an application program operative in the user space and a generic packet generator operative in the kernel space. The application program may cause the computing device to generate a first stream definition including a first background data template and one or more first user defined fields. The generic packet generator may cause the computing device to generate a first plurality of transmission-ready packets, wherein each packet of the first plurality of transmission-ready packets comprises the first background data template overlaid by the one or more first user defined fields.

Generic packet generator and method

Hardware time stamping and synchronized data transmission disclosed. In a method, a reference time stamp and a local time stamp are obtained. A synchronization offset is prepared based on the local time stamp and the reference time stamp. Instructions are received to send a plurality of data units at a specified time. The plurality of data units are sent at the specified time based on referring to a local time obtained from a local clock and the synchronization offset to simultaneously send a packet storm comprising the plurality of data units. The method may be achieved by a network communications unit on a plurality of network cards included in a network testing system.

Hardware time stamping and synchronized data transmission

A virtual interface is disclosed. A method may include allowing upper layer software to transparently access the capabilities of a network device via a virtual interface as if the network device were in a computing device in which the upper layer software is resident. A communication channel may be established with a computing device. A virtual interface to a network device in the computing device is created. Incoming data units directed to the network device are received via the communication channel, and are made available via the virtual interface. Outgoing data units directed to the virtual interface may be forwarded to the network device via the communication channel. The methods may be implemented on computing devices that include network cards, including computers and/or network testing systems.

Virtual interface

Methods for serializing and deserializing a program object are disclosed. Serialized data may be generated to convey a representation of the program object. The serialized data may include data identifying a class for the program object, and a data type and at least one data value for each data member comprising the program object. The program object may be reconstructed from the serialized data according to a definition of the identified class. A received data member may be reconstructed if the received data type is an expected data type according to the class definition. A received data member may be ignored if the expected data type according to the class definition is a null data type. Default data may be substituted for a received null data member if the expected data type according to the class definition is not a null data type. The received data type may be converted to an expected data type according to the class definition.

Version-adaptive serialization and deserialization

There are disclosed processes and systems relating to protocol stacks. The protocol stack may be run entirely in a single memory space. There may be a communal memory region available to certain layers of the protocol stack. The layers of the protocol stack may form condensed versions of data and headers, and data units may be formed by hardware within the device when needed. After transmission, data units may be immediately deleted but recreated if needed for retransmission.

Protocol stack

There are disclosed processes and systems relating to simulated real-time packet generation to test a communications network. A first packet stream is defined and transmitted. Each packet in the first packet stream is composed from a first background data field and one or more user defined fields that overlay the first background data field.

Generic packet generation

Hardware time stamping is disclosed. In a method, a transmit time stamp may be added to an outgoing data unit in hardware prior to transmitting the outgoing data unit over a communications medium. The outgoing data unit may be received from a processor and may be intended for a node. The outgoing data unit may be transmitted over the communications medium to the node. An incoming data unit may be received over the communications medium. A receive time stamp may be added to the incoming data unit in hardware before the incoming data unit is provided to the processor. The method may be achieved on a hardware device included on a board in a network testing system.

Growing community of inventors

Thousand Oaks, CA, United States of America

Jan Olderdissen