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    • 8. 发明授权
    • Multicast cluster servicer for communicating amongst a plurality of nodes without a dedicated local area network
    • 用于在没有专用局域网的多个节点之间通信的多播集群服务器
    • US06192417B1
    • 2001-02-20
    • US09280469
    • 1999-03-30
    • Timothy Roy BlockBob Richard Cernohous
    • Timothy Roy BlockBob Richard Cernohous
    • G06F1516
    • H04L12/1818H04L12/185H04L12/1868
    • According to the present invention, a cluster communications system is provided that supports reliable and efficient cluster communications. The preferred embodiment cluster communication systems can be used to provide this reliable and efficient cluster communication for cluster configurations extending beyond a single local area network (LAN). The cluster communications system provides reliable and efficient cluster communication by facilitating multicast messaging between systems in the cluster. In particular, the preferred embodiment provides for the establishment of multicast groups in between which multicast messaging is provided. The preferred embodiment provides this multicasting while providing the needed mechanisms to assure ordered message delivery between systems. The preferred embodiment extends this efficient and reliable cluster communication by providing for additional point-to-point communication between systems not on the same LAN. Thus, the preferred embodiment provides a cluster communication system that uses reliable multicasting for efficient cluster communication in a way that can be used for clusters that extend beyond a single local area network.
    • 根据本发明,提供一种支持可靠且高效的集群通信的集群通信系统。 可以使用优选实施例的集群通信系统来为超出单个局域网(LAN)的集群配置提供这种可靠和有效的集群通信。 集群通信系统通过促进集群中的系统之间的多播消息传递提供可靠且高效的集群通信。 特别地,优选实施例提供了在提供多播消息传送之间的多播组的建立。 优选实施例提供了这种组播,同时提供所需的机制以确保系统之间的有序消息传递。 优选实施例通过在不在同一LAN上的系统之间提供额外的点对点通信来扩展这种有效和可靠的集群通信。 因此,优选实施例提供了一种集群通信系统,其以可用于扩展到单个局域网之外的集群的方式使用可靠的多播来进行有效的集群通信。
    • 9. 发明授权
    • Network address cache apparatus and method
    • 网络地址缓存装置及方法
    • US07552237B2
    • 2009-06-23
    • US10273218
    • 2002-10-17
    • Bob Richard CernohousTimothy Dennis Mullenbach
    • Bob Richard CernohousTimothy Dennis Mullenbach
    • G06F15/16
    • H04L29/12009H04L29/12066H04L61/00H04L61/1511H04L67/1002H04L67/1017H04L67/1019H04L67/1023H04L69/28
    • Cached information that includes multiple network addresses is delivered in a manner that changes the order of the network addresses each time the cached information is delivered to a client, thereby achieving load balancing in a manner that reduces network traffic and improves system performance. In the preferred embodiments, the user defines a minimum time to live (TTL) and one or more order change criteria. When a query is made to a DNS, the DNS returns an answer that includes a time to live (TTL). This answer may be stored in a cache, and may include multiple network addresses. If the TTL for the answer received from a DNS is less that the minimum TTL, the TTL for the answer is set to the minimum TTL before storing the answer in the cache. When a query may be satisfied by a cached answer that includes multiple network addresses, a cache mechanism delivers the multiple cached network addresses in an order determined by the one or more order change criteria if the TTL for the cached results is a positive number. In this manner load balancing can be achieved while still benefiting from the performance enhancements of caching DNS query results.
    • 包括多个网络地址的缓存信息以每次将缓存信息传送到客户端时改变网络地址的顺序的方式进行传送,从而以减少网络流量并提高系统性能的方式实现负载平衡。 在优选实施例中,用户定义最小生存时间(TTL)和一个或多个顺序改变标准。 当对DNS进行查询时,DNS返回包含生存时间(TTL)的答案。 该答案可以存储在高速缓存中,并且可以包括多个网络地址。 如果从DNS接收到的答案的TTL小于最小TTL,则将答案的TTL设置为最小TTL,然后将答案存储在缓存中。 当通过包括多个网络地址的缓存应答来满足查询时,如果缓存结果的TTL是正数,则高速缓存机制按照一个或多个顺序改变标准确定的顺序递送多个高速缓存的网络地址。 通过这种方式,可以在缓存DNS查询结果的性能增强的同时,实现负载平衡。