Abstract: A method is implemented by a switch in a software defined networking (SDN) network managed by a controller to achieve hitless resynchronization during a controller upgrade. The method includes installing an upgraded set of flow entries so that a packet processing pipeline of the switch includes both a non-upgraded set of flow entries and the upgraded set of flow entries, processing non-tunneled packets using the non-upgraded set of flow entries, processing tunneled packets that have a tunnel upgrade status indicator set in a tunnel header using the non-upgraded set of flow entries, while processing tunneled packets that do not have a tunnel upgrade status indicator set in a tunnel header using the upgraded set of flow entries, and processing non-tunneled packets using the upgraded set of flow entries after all switches managed by the controller have installed upgraded flow entries.

Abstract: A method is implemented by a switch in a software defined networking (SDN) network managed by a controller to achieve hitless resynchronization during a controller upgrade. The method includes installing an upgraded set of flow entries so that a packet processing pipeline of the switch includes both a non-upgraded set of flow entries and the upgraded set of flow entries, processing non-tunneled packets using the non-upgraded set of flow entries, processing tunneled packets that have a tunnel upgrade status indicator set in a tunnel header using the non-upgraded set of flow entries, while processing tunneled packets that do not have a tunnel upgrade status indicator set in a tunnel header using the upgraded set of flow entries, and processing non-tunneled packets using the upgraded set of flow entries after all switches managed by the controller have installed upgraded flow entries.

Abstract: A computing device in a wireless communications network identifies content to be transmitted to a mobile device in the wireless communications network. The computing device also determines mobile edge nodes that serve radio coverage areas at different positions along a path that the mobile device is expected to take while receiving the content. Further, the computing device allocates, for storage in respective caches of the mobile edge nodes, different portions of the content that are expected to be served by different mobile edge nodes as the mobile device moves along the path.

Abstract: A computing device in a wireless communications network identifies content to be transmitted to a mobile device in the wireless communications network. The computing device also determines mobile edge nodes that serve radio coverage areas at different positions along a path that the mobile device is expected to take while receiving the content. Further, the computing device allocates, for storage in respective caches of the mobile edge nodes, different portions of the content that are expected to be served by different mobile edge nodes as the mobile device moves along the path.

Abstract: Exemplary methods include receiving a request to allocate a first block. In response to receiving the request, allocating the first block at a first location in a first storage device, and allocating a first replicated block of the first block at a second location in a second storage device, wherein a starting address of the first replicated block of the first block is immediately after an ending address of the first block. The methods include receiving a request to allocate a second block. In response to receiving the request, allocating the second block at a first location in a third storage device, and allocating a first replicated block of the second block at a second location in the first storage device, wherein a starting address of the first replicated block of the second block is immediately after an ending address of the second block.