WAL relies on shared memory, so while a proper FS is necessary, it isn't going to help in this case.
replyWhy does it not help if both containers can mmap the same -shm file?
replyShared memory across containers is a property of a containerization environment, not a property of a file system, "proper" or not.
replyIt's a property of the filesystem, docker does not virtualize fs.
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