vip3r011

// This was basically ripped straight from http://en.wikipedia.org/wiki/Multiply-with-carry, just javscriptified.
var CMWCRand = function(seed) {
    var i, PHI = 0x9e3779b9;
    if(!seed) { seed = Date.now(); }

    var Q = this.Q = new Uint32Array(4096);
    this.c = 362436;
    this.i = 4095;

    Q[0] = seed;

vip3r011

-----------------------------------------------------------------------------------------------------
 Read Test
 fio --name=randread --ioengine=libaio --iodepth=16 --rw=randread --bs=4k --direct=0 --size=512M --numjobs=4 --runtime=240 --group_reporting
-----------------------------------------------------------------------------------------------------
writes a total 2GB files [4 jobs x 512 MB = 2GB] running 4 processes at a time:

fio --name=randwrite --ioengine=libaio --iodepth=1 --rw=randwrite --bs=4k --direct=0 --size=512M --numjobs=4 --runtime=240 --group_reporting
-----------------------------------------------------------------------------------------------------
 Read Write Performance Test
 fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=random_read_write.fio --bs=4k --iodepth=64 --size=4G --readwrite=randrw --rwmixread=75