Op 03-11-2022 om 12:00 schreef Mauro Ferraro - G2K Hosting:
It is a very promising technology, but in our experience, ceph made our
life a hell. We had an energy event in our Datacenter and ceph couldnt
support it, we can understand that these events may not happend, but
shits happends.
That's a totally different experience! We are using multiple Petabytes
of Ceph clusters behind our CloudStack environments and this works
flawlessly.
A powerloss which causes Ceph to go corrupt is probably a hardware
related issue and not Ceph.
Our traditional infrastructure (servers with hardware raid and nfs)
supported this event with no major problems. With ceph we had a lot of
data loss, we were searching data in the "garbage" (blocks) with rbd
tools, months of work, stress of the team and lots of furious clients.
Ceph can support some contingency but if the problem is big it will take
a lot of time to recover and in this time you can't put your clusters
and VMs to work.
If you will use ceph make sure that you have a mirror working in another
site that can run when have a big problem.
El 3/11/2022 a las 06:58, Mevludin Blazevic escribió:
Hi all,
is there someone who is using a ceph cluster both for secondary
storage (NFS service) and primary storage (rbd pool)? In my test
environment I have experienced some issues starting VMs after updating
cloudstack not able to convert images to RBD.
Yes, as said, we have.
Our Primary Storage is all RBD with KVM behind CloudStack.
Secondary Storage comes from simple Linux machines just exposing NFS
towards CloudStack.
Wido
Regards,
Mevludin
