Network controller, cluster system, and non-transitory computer-readable recording medium having stored therein control program

Patent metadata

Field	Value
Publication number	US-10122635-B2
Application number	US-201615347857-A
Country	US
Kind code	B2
Filing date	Nov 10, 2016
Priority date	Nov 18, 2015
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

A network controller including a virtual network setter that sets a virtual communication interface; a dummy packet generator that obtains communication progress information representing a communication progress state of communication of the second processing device with the connection destination device by causing the virtual communication interface to process a dummy packet that causes a receiver of the dummy packet to falsely recognize that the dummy packet is transmitted from the connection destination device; a reset packet generator that generates a reset packet containing the communication progress information; and a reset packet processor that removes, based on the reset packet, connection record information of the second processing device and the connection destination device, the connection record information being stored in the second processing device. This configuration prevents congestion when a processor is switched to another in a cluster system from occurring.

First claim

What is claimed is:

1. A network controller for a cluster system, the cluster system including a first processing device and a second processing device and being communicably connected with a connection destination device, the network controller being included in the second processing device and comprising a processor that:
in a case where a communication counterpart with the communication destination device is switched from the second processing device to the first processing device,
sets a virtual communication interface;
generates a dummy packet that causes a receiver of the dummy packet to falsely recognize that the dummy packet is transmitted from the connection destination device;
process the generated dummy packet as if the generated dummy packet is received via the virtual communication interface;
obtains communication progress information representing a communication progress state of communication of the second processing device with the connection destination device, the communication progress information being output in response to the dummy packet;
generates a reset packet containing the communication progress information using the obtained communication progress information;
removes, based on the reset packet, connection record information of the second processing device and the connection destination device, the connection record information being stored in the second processing device;
outputs the dummy packet containing provisional communication progress information;
outputs a response packet containing the communication progress information managed in the second processing device from the virtual communication interface in response to the dummy packet; and
generates the reset packet using the communication progress information contained in the response packet.

2. The network controller according to claim 1 , wherein the processor outputs two of the dummy packet different in the provisional communication progress information set therein.

3. A cluster system including a first processing device and a second processing device and being communicably connected with a connection destination device, the cluster system comprising a processor, being disposed in the second processing device, that:
in a case where a communication counterpart with the communication destination device is switched from the second processing device to the first processing device,
sets a virtual communication interface;
generates a dummy packet that causes a receiver of the dummy packet to falsely recognize that the dummy packet is transmitted from the connection destination device;
process the generated dummy packet as if the generated dummy packet is received via the virtual communication interface;
obtains communication progress information representing a communication progress state of communication of the second processing device with the connection destination device, the communication progress information being output in response to the dummy packet;
generates a reset packet containing the communication progress information using the obtained communication progress information;
removes, based on the reset packet, connection record information of the second processing device and the connection destination device, the connection record information being stored in the second processing device;
outputs the dummy packet containing provisional communication progress information;
outputs a response packet containing the communication progress information managed in the second processing device from the virtual communication interface in response to the dummy packet; and
generates the reset packet using the communication progress information contained in the response packet.

4. The cluster system according to claim 3 , wherein the processor outputs two of the dummy packet different in the provisional communication progress information set therein.

5. A non-transitory computer-readable recording medium having stored therein a control program for a cluster system including a first processing device and a second processing device and being communicably connected with a connection destination device, the control program causing a processor included in the second processing device to execute a process comprising:
in a case where a communication counterpart with the communication destination device is switched from the second processing device to the first processing device,
setting a virtual communication interface;
generating a dummy packet that causes a receiver of the dummy packet to falsely recognize that the dummy packet is transmitted from the connection destination device;
processing the generated dummy packet as if the generated dummy packet is received via the virtual communication interface;
obtains communication progress information representing a communication progress state of communication of the second processing device with the connection destination device, the communication progress information being output in response to the dummy packet;
generating a reset packet containing the communication progress information using the obtained communication progress information;
removing, based on the reset packet, connection record information of the second processing device and the connection destination device, the connection record information being stored in the second processing device;
outputting the dummy packet containing provisional communication progress information;
outputting a response packet containing the communication progress information managed in the second processing device from the virtual communication interface in response to the dummy packet; and
generating the reset packet using the communication progress information contained in the response packet.

6. The non-transitory computer-readable recording medium according to claim 5 , wherein the process further comprises:
outputting two of the dummy packet different in the provisional communication progress information set therein.

Assignees

• Fujitsu Ltd

Inventors

• Shichino Nobuyuki

Classifications

• H04L47/193 Primary

  at the transport layer, e.g. TCP related · CPC title

• H04L67/1097

  for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS] · CPC title

• H04L69/163

  In-band adaptation of TCP data exchange; In-band control procedures · CPC title

• H04L67/10

  in which an application is distributed across nodes in the network (software deployment G06F8/60; multiprogramming arrangements G06F9/46) · CPC title

• H04L47/2466

  using signalling traffic · CPC title