Method and device for communication between cluster nodes

Abstract

The invention discloses a method and a device for communication between cluster nodes. The method comprises the steps of dividing a message communication area, a plurality of channels corresponding to each cluster node and a plurality of buffers corresponding to the channel depth for each cluster node on a shared disk of a cluster; switching a communication mode of the first cluster node from a socket communication mode to a network communication mode, and continuously monitoring a message communication area of the first cluster node on the shared disk; writing the first distributed lock manager information into a channel corresponding to the first cluster node in a message communication area of the second cluster node on the shared disk; and calling an information processing function to process the second distributed lock manager information, popping up a buffer where the second distributed lock manager information is located, and sending a message reply to the second cluster node. According to the method, the scrambling phenomenon of DLM communication can be avoided, the read-write overhead and time delay of data in a large-scale cluster are reduced, and the practicability and availability of a shared disk communication system in the cluster are improved.

Description

technical field [0001] The present invention relates to the field of network transmission, and more specifically, to a communication method and device among cluster nodes. Background technique [0002] In the field of server virtualization, since the cluster file system can be shared and mounted by multiple servers at the same time, it is often used as a bridge between multiple computing nodes and centralized storage. The cluster file system can provide file concurrent access control, integrity assurance, high availability, and redundancy, etc., and is used by virtualization systems to store virtual machine images and share storage pools. The distributed lock manager (DLM) is a key component of the cluster file system and is used to manage concurrent access to shared resources; it mainly solves the problem of disk cache consistency between cluster nodes and improves the efficiency of shared file access . Common cluster file systems such as GFS, VMFS, OpenVMS Files, ocfs2, ...

AI Technical Summary

Problems solved by technology

However, in this scheme, when multiple nodes send messages to the faulty node, they need to rely on the diskpaxos algorithm to compete for the message sending area

However, the execution process of the disk paxos algorithm itself is relatively complicated. It needs to go through processes such as multi-node initiation of proposals, waiting for proposals to be received, and random delays to avoid conflicts after election failures, which will significantly increase IO (reading and writing) overhead and delay. This process itself is relatively time-consuming

Especially for large-scale clusters, the collision probability of diskpaxos increases, which further increases IO overhead and delay, affects the performance of the cluster, and limits the scale of the cluster

[0005] There is currently no effective solution to the problem of high data read and write overhead and prolonged time in large-scale clusters of the contention mechanism for DLM communication between nodes in the prior art

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