<div dir="ltr">Hi Openstack-users,<div><br>I am having a problem with I/O performance on VM running Oracle Linux 6, I/O throughput on VM Oracle Linux 6 is much lower than VM using another OS (Ubuntu, CentOS).<div><br></div><div>- VM Oracle Linux 6: throughput 40 MBps</div><div><a href="https://prnt.sc/buKscX_qEtcF">https://prnt.sc/buKscX_qEtcF</a><br></div><div><br></div><div>- Other VM: throughput 113 MBps</div><div><a href="https://prnt.sc/IRhBUPrGgLOy">https://prnt.sc/IRhBUPrGgLOy</a><br></div><div><br></div><div>- Test tool:</div><div> <span style="background-color:rgb(245,248,250);color:rgb(75,77,77);font-family:Consolas,monaco,monospace;font-size:15px">dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync; rm -f test</span></div><br class="gmail-Apple-interchange-newline"><div><br>My Enviroment:<br>- Openstack: Ussuri <br>- Ceph: Octopus 15.2.8<div>- Compute: CentOS8_x86_64, kernel: 4.18.0-240.15.1.el8_3.x86_64<br>- KVM: qemu-kvm-5.2.0-16.el8.x86_64<br>- VM Oracle linux6: kernel-uek-4.1.12-124.42.3.el6uek.x86_64<br><br>I think because the kernel of Oracle Linux 6 is too old, maybe an older KVM version could support it, and now KVM does not optimize for this OS. <br></div><div><br></div><div>Could you guy can help me with this?</div></div><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><p><b><span style="font-size:14.0pt;font-family:"Arial","sans-serif"">Lê
Quang Long</span></b></p>
<p><span style="font-family:Arial,sans-serif"><font color="#000000">0942.533.683</font></span><span style="font-family:"Arial","sans-serif""> | 0977.116.502</span></p></div></div></div></div>