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Re: Performance Discrepancies and Limitations in Local Storage IOPS Test
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From: |
Alberto Garcia |
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Subject: |
Re: Performance Discrepancies and Limitations in Local Storage IOPS Testing |
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Date: |
Fri, 25 Aug 2023 12:26:57 +0000 |
On Thu, Aug 24, 2023 at 12:29:43PM +0200, Jan Wasilewski wrote:
> Ultimately, I discovered that the performance is significantly
> enhanced when the hypervisor is deployed on top of Ubuntu
> 22.04LTS. Under this setup, I was able to achieve around 100,000
> IOPS during my fio tests [1][2]. In contrast, conducting a similar
> test with the hypervisor deployed on Ubuntu 20.04LTS yielded
> significantly lower results, averaging around 20,000 IOPS [3][4].
That's quite a difference. How are you storing the virtual disks? Is
it qcow2 files? How are they created (i.e. what options are you
using?), what runtime options -if any- are you using with them (e.g.
l2-cache-size)?
Did you try to build QEMU 6.2 in Ubuntu 20.04 and see what happens
with the IOPS?
Berto