Software, systems and methods for managing a distributed network

• US 6,671,724 B1
• Filed: 03/21/2000
• Issued: 12/30/2003
• Est. Priority Date: 03/21/2000
• Status: Expired due to Fees

• Current Assignee: Centrisoft Corp.
• Original Assignee: Centrisoft Corp.
• Inventors: Pandya, Suketu J., Lakshmanan, Hariharan
• Primary Examiner(s): Powell, Mark R.
• Assistant Examiner(s): VU, THONG H
• Application Number:
  US09/532,101
• Time in Patent Office: 1,379 Days
• Field of Search: 709/223, 709/224, 709/225, 709/226, 709/232, 709/229, 709/234, 709/250, 370/395, 370/236, 710/17, 710/40, 714/20
• US Class Current: 709/226
• CPC Class Codes: G06F 11/3495 for systems
• CPC Class Codes: H04L 41/046 comprising network management agents or mobile agents therefor
• CPC Class Codes: H04L 41/0893 Assignment of logical groups to network elements
• CPC Class Codes: H04L 41/0894 Policy-based network configuration management
• CPC Class Codes: H04L 41/0896 Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, H04L47/76
• CPC Class Codes: H04L 41/22 comprising specially adapted graphical user interfaces [GUI]
• CPC Class Codes: H04L 41/5003 Managing SLA; Interaction between SLA and QoS
• CPC Class Codes: H04L 41/5096 wherein the managed service relates to distributed or central networked applications
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 43/06 Generation of reports
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 43/0829 Packet loss
• CPC Class Codes: H04L 43/0852 Delays
• CPC Class Codes: H04L 43/087 Jitter
• CPC Class Codes: H04L 43/0882 Utilisation of link capacity
• CPC Class Codes: H04L 43/0888 Throughput
• CPC Class Codes: H04L 43/106 using time related information in packets, e.g. by adding timestamps
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/10015 Access to distributed or replicated servers, e.g. using brokers
• CPC Class Codes: H04L 67/1008 : based on parameters of servers, e.g. available memory or workload monitoring of computer activity G06F11/30
• CPC Class Codes: H04L 67/101 : based on network conditions
• CPC Class Codes: H04L 67/1014 : based on the content of a request
• CPC Class Codes: H04L 67/1023 : based on a hash applied to IP addresses or costs
• CPC Class Codes: H04L 67/1029 : using data related to the state of servers by a load balancer
• CPC Class Codes: H04L 9/40 : Network security protocols

Abstract

Software, systems and methods for managing a distributed network environment including a plurality of computers interconnected by a network link, where at least some of the computers include a layered communications protocol stack for providing a data interface between an application program and the network link, the communications stack having a transport protocol layer for providing an end-to-end communications connection. The invention includes a control module and a plurality of agent modules, each agent being associated with one of the computers and adapted to dynamically monitor the associated computer at a data transmission point between an application program running on the computer and the transport protocol layer and repeatedly communicate with the control module in order to effect management of the distributed network system. The invented software, systems and methods may also include a messaging feature for providing users, IT personnel, or various management systems with informative messages concerning network conditions and network resources.

Claims

1. A system for dynamically allocating bandwidth among a plurality of distributed client computers interconnected by a network link, comprising:

a plurality of agents, each agent being associated with one of the plurality of distributed client computers; and

a control module, wherein

the agents are adapted to repeatedly communicate bandwidth allocation data for the distributed client computers to the control module;

in response to the bandwidth allocation data communicated by the agents, the control module is adapted to dynamically calculate a bandwidth allocation for each of the distributed client computers and communicate the calculated bandwidth allocation to the agent associated with the respective distributed client computer; and

each agent is adapted to receive the calculated bandwidth allocation for its associated distributed client computer from the control module and restrict bandwidth usage by the distributed client computer to the calculated allocation, the control module being adapted to dynamically allocate bandwidth by;

apportioning available bandwidth to determine a configured bandwidth share for each distributed client computer during an upcoming time period;

obtaining a prior bandwidth allocation for each distributed client computer, wherein the prior bandwidth allocation is an amount of bandwidth allotted to each distributed client computer during a prior period;

obtaining a utilized bandwidth for each distributed client computer, wherein the utilized bandwidth is an amount of bandwidth used by each distributed client computer during the prior period; and

comparing the configured bandwidth share, prior bandwidth allocation and utilized bandwidth for each distributed client computer to determine an upcoming bandwidth allocation for each distributed client computer for the upcoming period.

2. The system of claim 1, wherein if the utilized bandwidth is less than the prior bandwidth allocation for any of the distributed client computers, the upcoming allocation for such distributed client computer is determined by reducing the prior bandwidth allocation for such distributed client computer.

3. The system of claim 1, wherein if the prior bandwidth allocation is less than the configured bandwidth share for any of the distributed client computers, and if the utilized bandwidth is substantially equal to the prior bandwidth allocation for any such distributed client computer, the upcoming allocation for such distributed client computer is determined by increasing the prior bandwidth allocation for such distributed client computer.

4. A method of dynamically allocating bandwidth to a plurality of distributed client computers connected to a network, comprising the steps of:

periodically obtaining bandwidth allocation data for each of the distributed client computers;

dynamically calculating a bandwidth allocation for each of the distributed client computers based on the bandwidth allocation data; and

controlling network access of each of the distributed client computers to limit network bandwidth usage of each of the distributed client computers to the calculated bandwidth allocations, where such control is achieved through operation of an agent software module loaded into memory of each of the distributed client computers, wherein the step of dynamically calculating a bandwidth allocation for each of the distributed client computers is performed by;

apportioning available bandwidth to determine a configured bandwidth share for each distributed client computer during an upcoming time period;

obtaining a prior bandwidth allocation for each distributed client computer, wherein the prior bandwidth allocation is an amount of bandwidth allotted to each distributed client computer during a prior period;

obtaining a utilized bandwidth for each distributed client computer, wherein utilized bandwidth is an amount of bandwidth used by each distributed client computer during the prior period; and

comparing the configured bandwidth share, prior bandwidth allocation and utilized bandwidth for each distributed client computer to determine a bandwidth allocation for each distributed client computer for the upcoming period.

5. The method of claim 4, wherein if the utilized bandwidth is less than the prior bandwidth allocation for any of the distributed client computers, the upcoming allocation for such distributed client computer is determined by reducing the prior bandwidth allocation for such distributed client computer.

6. The method of claim 4, wherein if the prior bandwidth allocation is less than the configured bandwidth share for any of the distributed client computers, and if the utilized bandwidth is substantially equal to the prior bandwidth allocation for any such distributed client computer, the upcoming allocation for such distributed client computer is determined by increasing the prior bandwidth allocation for such distributed client computer.

7. A system for dynamically allocating bandwidth among a plurality of distributed client computers interconnected by a network link, comprising:

a plurality of agents, each agent being associated with one of the plurality of distributed client computers and adapted to monitor and control its associated distributed client computer by interfacing with a socket object used to operatively couple the network link with application programs running on the associated distributed client computer; and

a control module, wherein;

the agents are adapted to communicate bandwidth usage data for the distributed client computers to the control module;

the control module is adapted to dynamically calculate a bandwidth allocation for each of the agents in response to the bandwidth usage data; and

each agent is adapted to interface with the socket object actively restrict bandwidth usage on the network link by its associated distributed client computer in accordance with the bandwidth allocation calculated for that agent, wherein the control module is adapted to dynamically allocate bandwidth by;

apportioning available bandwidth to determine a configured bandwidth share for each distributed client computer during an upcoming time period;

obtaining a prior bandwidth allocation for each distributed client computer, wherein the prior bandwidth allocation is an amount of bandwidth allotted to each distributed client computer during a prior period;

obtaining a utilized bandwidth for each distributed client computer, wherein the utilized bandwidth is an amount of bandwidth used by each computer during the prior period; and

comparing the configured bandwidth share, prior bandwidth allocation and utilized bandwidth for each distributed client computer to determine an upcoming bandwidth allocation for each distributed client computer for the upcoming period.