Simple CephFS FUSE benchmark

benchmark

#! /usr/bin/env ruby

require 'fileutils'
require 'thread'

lock = Mutex.new

NUMBER_OF_CLIENTS = 10

# tear down any old directories
for i in 0..NUMBER_OF_CLIENTS do
    directory = File.expand_path("cephfs-#{i}")

    # Create the directories and mount them
    FileUtils.mkdir_p "cephfs-#{i}"

    puts "Attempting to tear down #{directory}"
    `sudo fusermount -u #{directory}`

    puts "Starting client #{directory}"
    `sudo bin/ceph-fuse --id a #{directory}`
end

timings = []

threads = (0..NUMBER_OF_CLIENTS).map do |i|
    directory = File.expand_path("cephfs-#{i}")

    Thread.new do
        starting = Process.clock_gettime(Process::CLOCK_MONOTONIC)
        `du -a #{directory}/linux-master > /dev/null`
        ending = Process.clock_gettime(Process::CLOCK_MONOTONIC)
        elapsed = ending - starting
        lock.synchronize do
            timings << elapsed
        end
    end
end

threads.each(&:join)

puts "Average: #{timings.sum(0.0) / timings.size}"