公开(公告)号：US20140012808A1

公开(公告)日：2014-01-09

申请号：US14016827

申请日：2013-09-03

Applicant: IBM CORPORATION

Inventor： Bruce Gilbert LINDSAY ,  Roger C. RAPHAEL ,  Paul Sherwood TAYLOR

IPC: G06F17/30

CPC classification number: G06F9/5011 ,  G06F9/505 ,  G06F9/5061 ,  G06F9/5066 ,  G06F9/5088 ,  G06F9/54 ,  G06F17/30345

Abstract: A method and system for distributing tasks from an external application among concurrent database application server instances in a database system for optimum load balancing, based on consensus among the instances. Each application instance identifies a task partition ownership by those in a membership group based on a time window and generates a new membership group and partition ownership based on the current partition ownership. The instance makes the new membership group and partition ownership known to other members by recoding them in the membership table and partition map. Each participation by an instance in the membership group is identified by a random number. The new membership group and partition ownership are generated and adjusted based on an average partition allocation to achieve consensus among the instances.

Abstract translation: 基于实例之间的一致性，用于在数据库系统中的并发数据库应用程序服务器实例之间从外部应用程序分发任务以实现最佳负载平衡的方法和系统。 每个应用程序实例基于时间窗口标识成员组中的任务分区所有权，并根据当前分区所有权生成新的成员组和分区所有权。 该实例通过在成员资格表和分区映射中对它们进行重新编码，使其他成员获得了新的成员组和分区所有权。 会员组中的实例的每个参与由随机数来标识。 根据平均分区分配生成和调整新成员组和分区所有权，以实现实例之间的一致。