IO Delay

[rubi2020]

IO delay too high

is it the CPU or the hard drive? I have Seagate drive which inside VM is giving around 120mbps. I have vm on qcow2 .

Will SSD solve this or I need to change CPU

Kind Regards.

 

[schannall]

I/O is Harddisk -> an SSD should at least help

 

[H4R0]

What does the rrd graph look like if you scroll down. Is it always at 60% ?

Io is only drive related. But it might be a misbehaving process that constantly writes/reads. A ssd wouldnt help then.

 

[rubi2020]

What does the rrd graph look like if you scroll down. Is it always at 60% ?

Io is only drive related. But it might be a misbehaving process that constantly writes/reads. A ssd wouldnt help then.

https://prnt.sc/su7thx

2 days ago I started adding VMS, But even when 1vm runs IO is like 8%-15%
Now this server has more than 10

how can I generate rrd graph

 

[H4R0]

https://prnt.sc/su7thx

2 days ago I started adding VMS, But even when 1vm runs IO is like 8%-15%
Now this server has more than 10

how can I generate rrd graph

Look per vm not on the server. Scroll down in the window you see cpu and ram in the screenshot, disk is the last graph.

Thats really unusual, what are these vm's running ?

io wait should not increase by adding vms, at least not that much. You want io wait to always be 0% or as low as possible.

If io wait goes above 30% your overall system performance will go down drastically.

Maybe your drive is bad, i would replace it.

 

[rubi2020]

I have 2 drive 1 is old HP one SAS and for VMS all are in new Seagate. I want to and remove HP.

My plan would be,

Add new SSD for proxmox main server.
Keep this Seagate with all old VMS.

Can I mount HDD without formatting all these VMS and use these VMs?

 

[H4R0]

I have 2 drive 1 is old HP one SAS and for VMS all are in new Seagate. I want to and remove HP.

My plan would be,

Add new SSD for proxmox main server.
Keep this Seagate with all old VMS.

Can I mount HDD without formatting all these VMS and use these VMs?

Sure you can add a ssd/hdd and then move the existing vm's onto it.

 

[rubi2020]

@H4R0 Yes. I have ordered some SSD.

But the problem is the hard disk is offline now. This is the old HDD which has only proxmox OS running in it.

All VMs on another Seagate HDD is running as of now.

Today SSD will arrive.

How should I proceed and attach Seagate HDD to newly installed proxmox without losing VMS?

 

[H4R0]

@H4R0 Yes. I have ordered some SSD.

But the problem is the hard disk is offline now. This is the old HDD which has only proxmox OS running in it.

All VMs on another Seagate HDD is running as of now.

Today SSD will arrive.

How should I proceed and attach Seagate HDD to newly installed proxmox without losing VMS?

It depends on your storage, can you make a screenshot of Datacenter -> Storage (Proxmox GUI)

You can simply attach the hdd it wont delete any vm's, but do not format it (do not run any command with /dev/x in it)

Go to your new Proxmox Gui Datacenter -> Storage, now click on "Add", select the same storage type as your old one. You should be able to select your old storage now, if it is not listed you might need additional steps depending on your storage type.