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multiple compute using single shared storage location

ive been experimenting with using a single shared fiber channel storage location for multiple compute nodes. I want to ask is this a supported, stable way to use shared storage?

the shared storage filesystem is a ocfs2 filesystem so it supports access by multiple servers simultaneously. I am using Openstack Newton

I changed each compute node /etc/nova/nova.conf instances_path=/mnt/shared_storage/nodes

when I do this two things of interest appear in /mnt/shared_storage/nodes directory a "_base" directory and a "compute_nodes" file.

in the "compute nodes" file I see a listing of all my compute nodes. {"node-12.mydom.com": 1513556772.745646, "node-13.mydom.com": 1513555040.049979, "node-11..mydom.com": 1513554968.764515,.....................

it looks like it is designed to share this shared storage space somehow, right? and to take advantage of _base images uploaded by other computes, right?

I dont see much documentation in this area. so I want to ask is this a supported, stable way to use shared storage? or should I be making a directory for each compute node on the shared storage? thx!