Thank you for the provided information and considerations, David! Our
experience with Ubuntu (so far) adheres to your opinion.
Nevertheless, we will try CentOS, on the medium / long term. Given the
overall reliability of our current setup, it will have to provide
significant benefits in order to s
All of that said, the most important factor is in regards to your most
expensive asset... personnel. If you have a dozen sysadmins and you're
maintaining a few platforms each using their own OS, then your company is
wasting a lot of money in your admins dealing with that extra intellectual
cost of
Saying Ubuntu doesn't have a place on servers negates your assertion that
the OS is a tool and you should use the right tool for the right job.
Sometimes you need an OS that updates its kernel more often than basically
never. Back when VMs were gaining traction and CentOS 6 was running the 2.6
kern
Thanks for the indirect recommendation; we'll ponder on the switch to
CentOS, on the medium / long run.
Until then, we're looking forward for best practices and advice from the
Ceph community, on running the cluster on Ubuntu 16.
Regards,
Bogdan
On Sat, Oct 28, 2017 at 2:46 PM, Marc Roos wrote
I hope I can post here a general question/comment regarding
distributions. Because I see a lot of stability issues passing by here.
Why are people choosing an ubuntu distribution to run in production?
Mostly I get an answer like they are accustomed to using it. But is the
OS not just a tool?
If you can do an ssh session to the IPMI console and then do that inside of
a screen, you can save the output of the screen to a file and look at what
was happening on the console when the server locked up. That's how I track
kernel panics.
On Fri, Oct 27, 2017 at 1:53 PM Bogdan SOLGA wrote:
>
Thank you very much for the reply, Ilya!
The server was completely frozen / hard lockup, we had to restart it via
IPMI. We grepped the logs trying to find the culprit, but to no avail.
Any hint on how to troubleshoot the (eventual) freezes is highly
appreciated.
Understood on the kernel recommend
On Fri, Oct 27, 2017 at 6:33 PM, Bogdan SOLGA wrote:
> Hello, everyone!
>
> We have recently upgraded our Ceph pool to the latest Luminous release. On
> one of the servers that we used as Ceph clients we had several freeze
> issues, which we empirically linked to the concurrent usage of some I/O
>
Thanks a lot for the recommendation, David!
Are you aware of any drawbacks and / or known issues with using rbd-nbd?
On Fri, Oct 27, 2017 at 7:47 PM, David Turner wrote:
> rbd-nbd is gaining a lot of followers for use as mapping rbds. The kernel
> driver for RBD's has taken a while to support
rbd-nbd is gaining a lot of followers for use as mapping rbds. The kernel
driver for RBD's has taken a while to support features of current ceph
versions. The nice thing with rbd-nbd is that it has feature parity with
the version of ceph you are using and can enable all of the rbd features
you wa
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