Hey guys, We wrote this simple program to try to achieve what Fio (linux program) does. Fio can easily achieve 100K IOPS on an Amazon i3.large instance with NVMe SSD. However, with Go we're unable to achieve anything close to that.
https://github.com/dgraph-io/badger-bench/blob/master/randread/main.go This program should be simple to run. It uses Fio generated files. And basically tries 3 things: 1. random reads in a single goroutine (turned off by default), 2. random reads using specified number of goroutines, 3. same as 2, but using a channel. 3 is slower than 2 (of course). But, 2 is never able to achieve the IOPS that Fio can achieve. I've tried other things, to no luck. What I notice is that Go and Fio are close to each other as long as number of Goroutines is <= number of cores. Once you exceed cores, Go stays put, while Fio IOPS keeps on improving, until it reaches SSD thresholds. So, how could I change my Go program to realize the true throughput of an SSD? Or, is this something that needs further work in Go (saw a thread about libaio). Cheers, Manish -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
