[ovirt-users] Q: ext4 noatime/nidiratime for oVirt node mount points

[Yaniv Kaul]

On Jan 4, 2018 7:01 PM, "Donny Davis" <donny at 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.



https://www.ovirt.org/documentation/admin-guide/chap-Log_Files/

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

>
>
> On Thu, Jan 4, 2018 at 5:04 PM, Donny Davis <donny at 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.
>>
>> [image: Inline image 1]
>>
>> On Thu, Jan 4, 2018 at 9:51 AM, andreil1 <andreil1 at starlett.lv> wrote:
>>
>>>
>>>
>>> On 4 Jan 2018, at 14:52, Donny Davis <donny at 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 at 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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>>>>
>>>
>>>
>>>
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>>
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>
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