I have made extensive load tests in the last few days and figured out
it's definitely a network related issue. I changed from jumbo frames
(mtu 9000) to default mtu of 1500. With a mtu of 1500 the problem
doesn't occur. I'm able to bump the io-wait of our gluster storage
servers to the max possible values of the disks without any error or
connection loss between the hypervisors or the storage nodes.
As mentioned in multiple gluster best practices it's recommended to use
jumbo frames in gluster setups for better performance. So I would like
to use jumbo frames in my datacenter.
What could be the issue here?
Am 19.08.2022 07:47 schrieb Strahil Nikolov:
You can check the max op version and if only the oVirt nodes are using
it -> bump it to the maximum.
I upgraded my 4.4 while preserving the Gluster storage - just back up
the /etc/glusterfs & /var/lib/glusterd . Keep in mind that if you use
VDO you need to backup it's config too.
Best Regards,
Strahil Nikolov
Yes, the firmware update of the network adapters is planned for the
next
week.
The tcpdump is currently running and i will share the result with
you.
The update to ovirt 4.4 (and to 4.5) is quite a big deal because of
the
switch to CentOS stream where a full reinstall is required and there
is
no possibility to preserve local storage on standalone hypervisors.
:P
Gluster opversion is 60000.
Am 18.08.2022 23:46 schrieb Strahil Nikolov:
Usually I start with firmware updates/OS updates.
You can be surprised how many times bad firmware (or dieing NIC)
has
left me puzzled.
I also support the tcpdump - let it run on all nodes and it might
give
a clue what is causing it.
I think there is no need to remind you that you should update to
oVirt
4.4 and then to 4.5 ;)
By the way, what is your cluster OP version ?
Best Regards,
Strahil Nikolov
On Thu, Aug 18, 2022 at 14:27, Péter Károly JUHÁSZ
<juhasz.peter.karoly@xxxxxxxxx> wrote:
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