公开(公告)号：US10154090B1

公开(公告)日：2018-12-11

申请号：US14860853

申请日：2015-09-22

Applicant: EMC Corporation

Inventor： Joshua Baergen ,  Brian Lake ,  Steven Bromling

IPC: G06F15/16 ,  H04L29/08 ,  G06F12/0802

Abstract: A share group for a distributed volume is separated into two non-overlapping, cluster-local SGCs (share group cliques). Each SGC has an independent local meta-directory master hosted by a computing node of the SGC cluster. Each SGC maintains an independent local directory for the distributed volume. The directory may be spread across multiple computing nodes of the SGC cluster. Changes to the distributed volume (writes) are coordinated across the pair of SGCs to provide data consistency. The coordination of these changes is conducted using relatively few inter-SGC round-trips. Read access to the distributed volume is safely conducted without inter-SGC coordination.