Abstract: Mechanisms are provided for tracing a route taken by a packet in a Software Defined Network (SDN). Each switch in the SDN is assigned a first color label, from a set of color labels, such that such that adjacent switches have different color labels. Rules are installed in each switch to forward a received data packet to the SDN controller in response to a second color label of the received data packet not matching the first color label assigned to the switch. A second color label, from the set of color labels, is assigned to a trace data packet. A route of the trace data packet is traced through the SDN based on the second color label and application of the one or more rules to the trace data packet at each of the switches in the SDN as the trace data packet is received by each of the switches in the SDN.

Abstract: To provide client-side fault-tolerance in a publish-subscribe system, a message is received on a channel from a server. At a function executing using a processor and a memory, a determination is made whether the message contains a heartbeat data. When the message contains the heartbeat data, a determination is made whether a content signature contained in the message matches a last known content signature saved from a previous message. When the content signature contained in the message does not match the last known content signature saved from a previous message, a refresh message is sent to the channel.

Abstract: Mechanisms are provided for tracing a route taken by a packet in a Software Defined Network (SDN). Each switch in the SDN is assigned a first color label, from a set of color labels, such that such that adjacent switches have different color labels. Rules are installed in each switch to forward a received data packet to the SDN controller in response to a second color label of the received data packet not matching the first color label assigned to the switch. A second color label, from the set of color labels, is assigned to a trace data packet. A route of the trace data packet is traced through the SDN based on the second color label and application of the one or more rules to the trace data packet at each of the switches in the SDN as the trace data packet is received by each of the switches in the SDN.

Abstract: A method, system, and computer program product for determining a congestion value in a networking component in a data network are provided in the illustrative embodiments. A first packet is set to use a first priority level and a second packet is set to use a second priority level. The second priority level is lower than the first priority level. The second packet is transmitted after the first packet to the networking component, causing the networking component to transmit the first and the second packets after they are received at the networking component. A function is applied to an arrival delay to compute the congestion value of the networking component, wherein the arrival delay comprises a length of an elapsed period between receiving a transmission of the first packet from the networking component and receiving a transmission of the second packet from the networking component.

Abstract: A hardware accelerator receives a request to decompress a data stream that includes multiple deflate blocks and multiple deflate elements compressed according to block-specific compression configuration information. The hardware accelerator identifies a commit point that is based upon an interruption of a first decompression session of the data stream and corresponds to one of the deflate blocks. As such, the hardware accelerator configures a decompression engine based upon the corresponding deflate block's configuration information and, in turn, recommences decompression of the data stream at an input bit location corresponding to the commit point.

Abstract: A network adapter for handling packet reordering receives a set of packets. The network adapter is configured to aggregate a subset of in-sequence packets from the set of packets into at least one segment before passing the at least one segment from the network adapter to a next layer in a protocol stack. An in-sequence packet from the set of packets is stored into a first segment. Responsive to receiving an out of sequence packet in the set of packets, the out of sequence packet is stored in a second segment. An adaptive timeout timer is activated responsive to receiving the out of sequence packet, and the first segment is held at the network adapter while the adaptive timeout timer runs. Prior to the adaptive timeout timer expiring, a missing packet is received and included in the first segment. The network adapter sends the first segment to the next layer.

Abstract: An approach is provided in which a first virtual machine, executing on a host computer system, generates a data packet with a target destination at a second virtual machine over a computer network. The host computer system identifies a data flow corresponding to the data packet based the data packet's header information, and analyzes path weightings of available paths that are made available to the identified data flow. In turn, the host computer system assigns one of the available paths to the identified data flow corresponding to a pre-defined physical layer path from the first virtual machine to the second virtual machine.

Abstract: A mechanism is provided in a data processing system for detecting lithographic hotspots. The mechanism receives a design layout. The mechanism generates spatial pattern clips from the design layout. The mechanism performs a transform on the spatial pattern clips to form frequency domain pattern clips. The mechanism performs feature extraction on the frequency domain pattern clips to form frequency domain features. The mechanism utilizes the extracted features on a set of training samples to train a machine learning classifier model. The mechanism classifies a set of previously unseen patterns, based on frequency domain features of the previously unseen patterns using the trained machine learning classifier model, into hotspots and non-hotspots.

Abstract: For location-based communication with mobile devices, a condition is received, at a device associated with a caller, where the condition has to be satisfied by a callee at a past location, the past location being a place where different callees with different mobile devices are present at different times. At the device associated with the caller, an instruction is received for making a telecommunication call to a mobile device of a potential callee in a set of potential callees, where each mobile device associated with each potential callee in set of potential callees was present at the past location at a past time, and where each potential callee in the set of potential callees satisfies the condition at the past location. Using a processor and a memory in the device associated with the caller, the telecommunication call is initiated to mobile devices associated with a subset of potential callees.

Abstract: For on-demand migration of data in a distributed memory storage configuration, an identifier is transformed at a client into a transformed identifier. From a current configuration of a first plurality of servers operating on a server-side at a current time, a current server is identified at the client. From a previous configuration of a second plurality of servers operating on a server-side at a previous time, a previous server is identified at the client. A first request is sent to the current server to perform an operation using the identifier. A second request is sent to the previous server to perform the operation using the identifier. When a first data in response to the first request is invalid and a second data in response to the second request is valid, the second data is migrated to the current server in a migration request from the client to the current server.

Abstract: For location-based communication with mobile devices, a condition is received at a device associated with a caller. The condition has to be satisfied by a callee at a future time and at a location, the location being a place where different callees with different mobile devices are present at different times. An instruction is received at the device for making a telecommunication call to the location where the callee is present with a mobile device and satisfies the condition at the future time. A set of potential callees is identified. Each mobile device associated with each callee in set of potential callees is present at the location at the future time, and each potential callee in the set of potential callees satisfies the condition. The telecommunication call is initiated to mobile devices associated with a subset of potential callees, the subset of potential callees including the callee.

Abstract: A method, system and computer program product for selecting a bitrate to stream encoded media. A manifest file is fetched, where the manifest file contains metadata for encoded media segments which includes tags signifying the associated encoded media segments being important to the viewer. A playback occupancy level is then increased before reaching these tagged media segment(s). A high bitrate (high quality) is selected to stream the tagged media segment(s) which are then fetched and played at the selected high bitrate in response to the new playback buffer occupancy level being above a threshold level. In this manner, those media segments that are of higher importance to the viewer will be viewed in a higher quality since content information is used to select the bitrate to receive the encoded media segments. As a result, the user's quality of experience in viewing media is improved.

Abstract: A method, system and computer program product for selecting a bitrate to stream encoded media. A manifest file is fetched, where the manifest file contains metadata for encoded media segments which includes tags signifying the associated encoded media segments being important to the viewer. A playback occupancy level is then increased before reaching these tagged media segment(s). A high bitrate (high quality) is selected to stream the tagged media segment(s) which are then fetched and played at the selected high bitrate in response to the new playback buffer occupancy level being above a threshold level. In this manner, those media segments that are of higher importance to the viewer will be viewed in a higher quality since content information is used to select the bitrate to receive the encoded media segments. As a result, the user's quality of experience in viewing media is improved.

Abstract: For current location-based telecommunication, an instruction is sent from a caller communication device to initiate a telecommunication with a set of destination communication devices. The instruction includes identifying information for a reference device but does not include any identifying information for the set of destination communication devices. Telecommunication data is received at the caller communication device from a destination communication device in the set of destination communication devices, where a server has established a communication channel between the caller communication device and the destination communication device based on a geolocation proximity of the destination communication devices relative to the reference device.

Abstract: For location-based communication with mobile devices, a condition is received, at a device associated with a caller, where the condition has to be satisfied by a callee at a past location, the past location being a place where different callees with different mobile devices are present at different times. At the device associated with the caller, an instruction is received for making a telecommunication call to a mobile device of a potential callee in a set of potential callees, where each mobile device associated with each potential callee in set of potential callees was present at the past location at a past time, and where each potential callee in the set of potential callees satisfies the condition at the past location. Using a processor and a memory in the device associated with the caller, the telecommunication call is initiated to mobile devices associated with a subset of potential callees.

Abstract: For location-based communication with mobile devices, a condition is received at a device associated with a caller. The condition has to be satisfied by a callee at a future time and at a location, the location being a place where different callees with different mobile devices are present at different times. An instruction is received at the device for making a telecommunication call to the location where the callee is present with a mobile device and satisfies the condition at the future time. A set of potential callees is identified. Each mobile device associated with each callee in set of potential callees is present at the location at the future time, and each potential callee in the set of potential callees satisfies the condition. The telecommunication call is initiated to mobile devices associated with a subset of potential callees, the subset of potential callees including the callee.

Abstract: For current location-based telecommunication, an instruction is sent from a caller communication device to initiate a telecommunication with a set of destination communication devices. The instruction includes identifying information for a reference device but does not include any identifying information for the set of destination communication devices. Telecommunication data is received at the caller communication device from a destination communication device in the set of destination communication devices, where a server has established a communication channel between the caller communication device and the destination communication device based on a geolocation proximity of the destination communication devices relative to the reference device.

Abstract: For location-based communication with mobile devices, a set of callee conditions is received at a caller's device, which has to be satisfied by a callee according to information descriptive of a condition of the callee. The state information is distinct from the location and a time of the callee's presence at the location. An evaluation is made that each device associated with each potential callee in a first subset has been present at the location at a specified time, and that each potential callee in the first subset satisfies the set of callee conditions. At the caller's device, an instruction is received for making a telecommunication call to a device of a potential callee in a first subset. The call is initiated from the caller's device to mobile devices associated with the first subset of potential callees.

Abstract: For on-demand migration of data in a distributed memory storage configuration, an identifier is transformed at a client into a transformed identifier. From a current configuration of a first plurality of servers operating on a server-side at a current time, a current server is identified at the client. From a previous configuration of a second plurality of servers operating on a server-side at a previous time, a previous server is identified at the client. A first request is sent to the current server to perform an operation using the identifier. A second request is sent to the previous server to perform the operation using the identifier. When a first data in response to the first request is invalid and a second data in response to the second request is valid, the second data is migrated to the current server in a migration request from the client to the current server.

Abstract: A method, computer program product, and data processing system for performing an improved optical proximity correction are disclosed, which better respect the electrical properties of the device being manufactured. A preferred embodiment of the present invention performs OPC by first dividing the perimeter of a mask region into a plurality of segments, then grouping the segments into at least two distinct groups, wherein segments in the first of these groups are adjusted in position so as to minimize edge placement error (EPE) when the photolithography using the mask is simulated. Segments in the second group are adjusted in position so as to minimize cumulative error in a dimension spanning the region, wherein the span of such dimension extends from segments in the first group to segments in the second group. Correction so obtained by this process more readily preserves the intended electrical behavior of the original device design.