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

2018-01-04 Thread 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 wrote: > > > On Jan 4, 2018 7:01 PM, "Donny Davis" wrote: > > Yaniv, > > If there was a central logging server, would the

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

2018-01-04 Thread Yaniv Kaul
On Jan 4, 2018 7:01 PM, "Donny Davis" 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

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

2018-01-04 Thread Donny Davis
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? https://www.ovirt.org/documentation/admin-guide/chap-Log_Files/ On Thu, Jan 4, 2018 at 11:43 AM, Yaniv Kaul

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

2018-01-04 Thread Yaniv Kaul
On Thu, Jan 4, 2018 at 5:04 PM, Donny Davis 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

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

2018-01-04 Thread Yaniv Kaul
On Thu, Jan 4, 2018 at 1:45 PM, Service wrote: > Hi ! > > Is it safe to turn on these options (noatime, nodiratime) in oVirt node > fstab for these mount points? > Not sure, but why would you do that? Y. > /home > / > /tmp > /var > /var/log > /var/log/audit > > Node 4.2

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

2018-01-04 Thread Fabrice Bacchella
Both are no brainer to activate (noatime is a superset of nodiratime, see https://lwn.net/Articles/244941/) for every mount point, unless you really know why you need exact atime. If you want to be super-safe, use relatime. You will get not-exact but usable atime, to know if a file was acceded

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

2018-01-04 Thread Donny Davis
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 I am not sure of the implications of changing these parameters, and I do not see an perceivable

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

2018-01-04 Thread andreil1
> On 4 Jan 2018, at 14:52, Donny Davis > 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.

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

2018-01-04 Thread Donny Davis
What is the purpose in putting these directives in for the hypervisor? On Thu, Jan 4, 2018 at 6:46 AM, andreil1 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 >