I was just curious, and I concur that there is no logic in not just using the defaults. 

On Thu, Jan 4, 2018 at 1:46 PM, Yaniv Kaul <ykaul@redhat.com> wrote:


On Jan 4, 2018 7:01 PM, "Donny Davis" <donny@fortnebula.com> wrote:
Yaniv, 

If there was a central logging server, would the hypervisors send them there and stop writing to disk (given its setup properly), or does it write them anyway?

We ship logs to the central logging, not instead of logging them locally. 
I reckon you could mount /var/log somewhere remotely, but I do not think it makes sense. 
Our logging is not intensive and has log rotation configured, so I'm not sure what the issue is. A r/o partition or a cheap SD card with limited write wear? 
Y. 


On Thu, Jan 4, 2018 at 11:43 AM, Yaniv Kaul <ykaul@redhat.com> wrote:


On Thu, Jan 4, 2018 at 5:04 PM, Donny Davis <donny@fortnebula.com> wrote:
That makes more sense. Have you measured the write load on the disks from just the hypervisor processes. I have included a screen shot from mine, and the load is very low.... in the Kilobytes/sec

And those are probably the logs, which will be written anyway...
Y.
 

I am not sure of the implications of changing these parameters, and I do not see an perceivable benefits from doing so.

Inline image 1

On Thu, Jan 4, 2018 at 9:51 AM, andreil1 <andreil1@starlett.lv> wrote:


On 4 Jan 2018, at 14:52, Donny Davis <donny@fortnebula.com> wrote:

What is the purpose in putting these directives in for the hypervisor?

I have small node where system and data domains located on the same RAID.
Data domains are on separate partitions.
These options allow minimise disk access activity.


On Thu, Jan 4, 2018 at 6:46 AM, andreil1 <andreil1@starlett.lv> wrote:
Hi !

Is it safe to turn on these options (noatime, nodiratime) in oVirt node fstab for these mount points?
/home
/
/tmp
/var
/var/log
/var/log/audit

Node 4.2 installed on CentOS, not with node DVD.

Thanks.

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