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

[Donny Davis]

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 at redhat.com> wrote:

>
>
> 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.
>>>>>
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at ovirt.org
>>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Users mailing list
>>>> Users at ovirt.org
>>>> http://lists.ovirt.org/mailman/listinfo/users
>>>>
>>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at ovirt.org
>>> http://lists.ovirt.org/mailman/listinfo/users
>>>
>>>
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20180104/53b60bea/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: write_load.png
Type: image/png
Size: 9400 bytes
Desc: not available
URL: <http://lists.ovirt.org/pipermail/users/attachments/20180104/53b60bea/attachment.png>