IO Graph

[tincboy]

I can see there's IO graph for each vm,
How does Proxmox calculate each VMs IO activity?
Does Proxmox create a lvm for each VM?

 

[dietmar]

I can see there's IO graph for each vm,
How does Proxmox calculate each VMs IO activity?

see /proc/$pid/io

Does Proxmox create a lvm for each VM?

no

 

[tincboy]

Thanks dietmar,
As every time a VM starts, it's pid change, how does you keep track of it's IO statistics while a VM can stop every moment?

 

[dietmar]

As every time a VM starts, it's pid change, how does you keep track of it's IO statistics while a VM can stop every moment?

We use rrd database to store time series.

 

[tincboy]

Thanks for your kind response,
Would you please guide me a little bit more?
What do you mean by store time series? Do you query save VM's total read/write on a fixed period and save them in db?

 

[dietmar]

What do you mean by store time series? Do you query save VM's total read/write on a fixed period and save them in db?

Please read the documentation at http://oss.oetiker.ch/rrdtool/

Basically I store total read/write with a timestamp, the rest is done by the rrdtool.