Optimizing file locking for 1000+ concurrent NFS users: What is the best practice?

Question

I'm developing a Bash script for a project involving NFS (specifically NFS3 and NFS4), aimed at managing critical sections. The script must efficiently handle over a thousand concurrent processes across various computers. Currently, I'm using Bash's noclobber option for file locking, but I'm uncertain about its suitability and effectiveness in this high-concurrency, distributed setting.

#!/bin/bash

lockfile="/mnt/nfs_dir/mylockfile.lock"

# Function to clean up lockfile
cleanup() {
    rm -f "$lockfile"
}
trap cleanup EXIT

# Attempt to acquire lock
if ( set -o noclobber; echo "$$" > "$lockfile") 2> /dev/null; then
    trap 'rm -f "$lockfile"; exit $?' INT TERM EXIT
    
    # Critical section starts
    # ...
    # Critical section ends

    rm -f "$lockfile"
    trap - INT TERM EXIT
else
    echo "Failed to acquire lock."
fi

Questions & Concerns:

• Scalability and Reliability: Can the noclobber approach effectively scale in a high-concurrency environment, especially with NFS and over a thousand workers from different computers?

• Alternative methods: Would flock or other file locking mechanisms be more appropriate in this scenario? What about DLM solutions?