公开(公告)号：EP2652924A2

公开(公告)日：2013-10-23

申请号：EP11849192.7

申请日：2011-12-16

申请人： Microsoft Corporation

发明人： PATEL, Parveen ,  IVANOV, Volodymyr ,  ZIKOS, Marios ,  PETTER, Vladimir ,  KUZNETSOV, Vyacheslav ,  DION, David Allen

IPC分类号： H04L12/56 ,  H04L12/28

CPC分类号： H04L47/125 ,  H04L43/0876 ,  H04L45/22 ,  H04L47/11

摘要： The present invention extends to methods, systems, and computer program products for synchronizing state among load balancer components. Embodiments of the invention include load balancers using a consistent hashing algorithm to decide how new connections should be load balanced. Use of consistent hashing algorithm permits load balancers to work in a stateless manner in steady state. Load balancers start keeping flow state information (destination address for a given flow) about incoming packets when it is needed, i.e., such as, for example, when a change in destination host configuration is detected. State information is shared across load balancers in a deterministic way, which allows knowing which load balancer is authoritative (e.g., is the owner) for a given flow. Each load balancer can reach the authoritative load balancer to learn about a flow that cannot be determined locally.