Thank you Sitsofe and Samuel for the response. Per your suggestion, I installed the following packages on my RH 7.5: openssl openssl-devel curl-devel Then I downloaded the latest fio source and compiled it. Now, I'm seeing the "http" engine listed: # fio --enghelp Available IO engines: cpuio mmap sync psync vsync pvsync pvsync2 null net netsplice ftruncate filecreate posixaio falloc e4defrag splice >> http << mtd sg Many thanks! Do you have some examples of fio benchmark params for object storage that you could share? Regards, Eliezer -----Original Message----- From: fio-owner@xxxxxxxxxxxxxxx [mailto:fio-owner@xxxxxxxxxxxxxxx] On Behalf Of Sitsofe Wheeler Sent: Thursday, September 27, 2018 8:18 AM To: eliezer@integritech.solutions Cc: fio Subject: Re: Resending: fio testing on S3 object storage Hi, You On Wed, 26 Sep 2018 at 17:54, <eliezer@integritech.solutions> wrote: > > It looks like I don’t have the "http" ioengine on my server: > > # fio --enghelp > Available IO engines: > cpuio > mmap > sync > psync > vsync > pvsync > pvsync2 > null > net > netsplice > ftruncate > libaio > rdma > posixaio > falloc > e4defrag > splice > rbd > mtd > pmemblk > dev-dax > sg > binject You need to have the appropriate dependencies available when you go to compile fio (you'll find that ./configure says that http is enabled). I believe for the http engine you need the development libraries for curl and openssl installed... -- Sitsofe | http://sucs.org/~sits/