<div dir="ltr"><div><div><div><div><div><div><div><div><div><div>Hi All,<br><br></div>I build a Gluster 3.8.4 (RHGS 3.2) cluster for a customer, and I am having some issue demonstrating that it performs well.<br><br></div>The customer compares it with his old NFS based NAS, and runs FIO to test workloads.<br><br></div>What I notice is that FIO throughtput is only +-20Mb/s, which is not a lot.<br></div>When I do a simple test with dd I easily get 600Mb/s throughput.<br></div>In
the fio job file the option "direct=1" is used, which bypasses caching.
If we run a fio job with direct=0 the performance goes up a lot, and is
near 600Mb/s as well.<br><br></div>The customer insists that on his old
system (that Gluster should replace) he could get 600Mb/s throughput
with fio, with the setting direct=1. and that he was rather underwhelmed
by the performance of Gluster here.<br><br></div>What I need is answers to either:<br></div>-
Have I overlooked something? I have not really done much tuning yet. Is
there some obvious paremeter I overlooked that could change the results
of a fio performance test?<br><br></div>or:<br><br></div>- Is testing
with "direct=1" not really a way to test Gluster, as the cache is a
rather important part of what is needed to make gluster perform?<br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><span><font color="#888888"><span></span></font></span><font style="color:rgb(0,0,0)" face="Liberation Sans">Vriendelijke Groet | Best Regards | </font><span style="color:rgb(0,0,0);font-family:"liberation sans"">Freundliche Grüße | </span><font style="color:rgb(0,0,0)" color="#000000" face="Liberation Sans">Cordialement</font><br style="color:rgb(0,0,0)"><span><font color="#888888"><span><div><hr style="color:rgb(0,0,0)" width="100%" size="2"><font style="color:rgb(0,0,0)" face="Liberation Sans">Krist van Besien | Senior Architect | Red Hat EMEA Cloud Practice | RHCE | RHCSA Open Stack </font></div><div><font style="color:rgb(0,0,0)" face="Liberation Sans">@: <a href="mailto:krist@redhat.com" target="_blank">krist@redhat.com</a> | M: <a href="tel:%2B41-79-5936260" value="+41795936260" target="_blank">+41-79-5936260</a></font></div></span></font></span><br><br></div></div></div></div></div></div></div></div>
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