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Questions tagged [iops]

111 questions
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How to I obtain details of current IOPs for an ESX Server

We have a number of ESX Servers connected to various iSCSI Targets and I want to do a consolidation exercise so want to get an idea of the current level of IOPS each of our servers uses. I tried running $start = Get-Date "2010-07-25…
Phil
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AWS i3en.3xlarge really low iops

I just launched a new instance ec2 instance of type i3en.3xlarge. Operating system is Ubuntu. I mounted the NVMe Instance store but every speed test I run is incredible low at around 7k iops. What am I doing wrong? Here are the steps I did: 1) Check…
Raphael Noero
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degraded iops and throughput on a linux machine in a cluster

we have a linux-based cluster on AWS with 8 workers. OS version (taken from /proc/version) is: Linux version 5.4.0-1029-aws (buildd@lcy01-amd64-021) (gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #30~18.04.1-Ubuntu SMP Tue Oct 20 11:09:25 UTC…
Elad Eldor
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how to check the IOPS when I have multiple disks attached to an Azure VM

I have considered Azure Standard_E16s_V3 vm and attached two premium disks (p30 , 1024 GB & 5000 IOPS). How can I calculate the average IOPS considering both disks. This is to check the possible reason of slowness. Initially there was a single…
RubenSo
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GCE Persistent SSD disks allocate more IOPS than specified

I've been testing GCE and created a VM with a persistent SSD disk to test disk performance. Persistent SSD disk that I configured was 37GB, which was supposed to give me 1110 IOPS but when I run diskspd.exe with the following parmeters, I get 1500…
user2629636
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SSD Raid perfomance

Disks: 10xSSD Ultrastar SS200 960GB 12GB/s Raid 0, 6, 10. Controller: LSI Syncro 9380-8e Filesystem: ext4 without LVM System: Centos 7 2x E5620 @ 2.40GHz 32GB RAM fio-2.1.10: --iodepth=32 --ioengine=libaio --rw=randrw --bs=4k --size 10000M…
shallrise
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Is there a better way to handle 100-200+ files/s?

I’ve got a challenge that as it stands right now, is hitting limitations of cloud computing in terms of IOPS and CPU. The thought is to bring these systems in-house long term but I think it can be architected in a better way to make better use of…
brenden
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The fio shows iops very less for CentOS6.0 vm running in kvm with backend disk SSD

Disk "iops" is very less with "fio" disk benchmark tool for CentOS 6.0 virtual machine running on KVM. When I execute same on CentOS 6.7 and CentOS 7.2, the iops is as expected. The back end disk is SSD and the command I executed is below. fio…
Paul Jany Godwin
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Drop in write performance when mirroring two RAID 0 arrays

On a CentOS 7 server with 4 SSDs, I created two RAID 0 arrays with mdadm. Both were formatted with ext4 and mounted on separate directories. I benchmarked them using fio and got the following results for random writes: randomwrites: (g=0):…
A.Jesin
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Purposefully overloading iops?

I was going to run a test with some of my junior devs on a few of our boxes and have them troubleshoot an "Out of IOPS" issue. I am curious if there is a way to purposefully overload or create an out of IOPS scenario? Thanks ahead of time! EDIT I am…
ehime
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Low iops,read and write performances

We are currently testing our using ZFS on Linux as a storage platform for our VPS nodes but we don't seem to be getting the performance figures we expected. Can you please provide some suggestions as to what we should be tweaking to reach higher…
vivek_rh
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How to get live scsi traces from Vscsistats?

Here are things I already know, using vscsistat -t option I can get command traces for "VM/.vmdk" on ESxi. Steps to get scsi traces are: Start capturing traces, On Successful starting will generated log_channel (id) vscsiStats -s -t -w…
use302432
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Is our RDS write IOPS too high

Our site has been running slow recently and I've noticed that the RDS write IOPS can go as high as 80/sec and as low as 9/sec. Is this something that could be causing pages to load slowly? If so what could be causing it. Our RDS is a db.m3.large…
Holly
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Improving high IOps Folder (Tomcat and Vmware)

Good day. We're moving a Tomcat from a physical server to one virtual Server. In the physical, and because the high IOps for the temp folder (¡developers!) we bought a Ramdisk software. My question is... Will a ramdisk software work in a vmware…
Carlos Garcia
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Finding correct IOPS to set limit with ESXi 5.5u2 and vSphere

We're running an ESXi 5.5u2 hypervisor that has a mirror of 2 15k SAS drives with a couple of VMs inside and we noticed some services become briefly unreachable if another VM is using all the IO. So I'm looking into a way to avoid this trickle…
Datus
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