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Mail server system and congestion control method

A mail server and congestion control technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of increased mail resend processing, and achieve the effect of controlling congestion and eliminating retention

Inactive Publication Date: 2010-12-22
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a system, if the latter server fails and the resending process of mail increases, it is not desirable to affect the sending of mail destined for the former, which is more reliable.

Method used

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  • Mail server system and congestion control method
  • Mail server system and congestion control method
  • Mail server system and congestion control method

Examples

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Embodiment Construction

[0032] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

[0033] figure 1 It is a figure which shows the block diagram of the mail server system of this embodiment.

[0034] exist figure 1Among them, for example, 101 represents a mail server system, 102 represents a plurality of mail servers that are redundant according to N+1, and 103 represents a retry server; 104 represents a load distribution device that performs load distribution of mail sending requests to the mail server 102; 105 and 106 represent portable terminals that can be sent by subscribers, 109 and 110 represent mail servers of other systems that serve as destinations for mail transmission, and 107 represents a wireless communication network that connects portable terminals 109 and 110 to the mail server system 101, 108 represents a network such as the Internet that connects the mail server system 101 and mail servers 109 and 110 of other systems....

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PUM

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Abstract

The invention relates to a mail server system and a congestion control method, whereby in some cases the mail server resource could not be effectively utilized in the overall system. A mail server system includes a congestion control management section managing a congestion control over the mail server system, a congestion statistical information collection section collecting the congestion statistical information of each mail server, and a resend queue having enough capacity, wherein a retry server for performing a retry process is provided. The congestion control management section detects the mail server where a fault occurs from the collected congestion statistical information and gives an instruction of regulating the sending of a mail directed to the faulty mail server to each mail server. The mail server instructed the regulating the sending of the mail directed to the faulty mail server transfers all the mails directed to that destination to the retry server, and transfers the received mail directed to the faulty mail server to the retry server until there is a regulation dissolution instruction from the congestion control management section.

Description

technical field [0001] The present invention relates to a mail server system and a congestion control method, in particular to a mail server system and a congestion control method for a communication operator to provide services that can send mail from subscribers to other operators and other users, and more specifically, Systems and methods related to efficient congestion control in the event of failure of a recipient's other mail server or communication path. Background technique [0002] Conventional e-mail (hereinafter referred to as mail) mail server systems are redundantly configured with multiple mail servers, and when the route to the destination mail server or the destination mail server fails, each mail server is used for congestion. control. Each mail server executes retry processing of the messages stored in the retransmission queue, thereby confirming the congestion state and judging the resolution of the failure. The congestion control of this mail server, fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/58H04L12/26
CPCH04L47/19H04L47/11H04L12/5875H04L43/16H04L12/5895H04L51/30H04L51/23H04L51/58
Inventor 神谷俊之小池隆文楠目稔史木下雅文田中宏司
Owner HITACHI LTD
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