VMware, Inc.
Region to host affinity for block allocation in clustered file system volume

Abstract:

A method is provided for a computer to allocate a resource from a clustered file system (CFS) volume stored on one or more physical storage devices to a file. The CFS volume includes resources organized into resource clusters and the resource clusters make up regions. The method includes, for each region of resource clusters, determining a first count of resources allocated to the host computer and a second count of resources allocated to all other host computers, and calculating a region weight based on the first count and the second count. The method further includes sorting a list of the regions based on their region weights, selecting a region at or near the start of the list, and allocating the resource from a resource cluster in the selected region to the file.