While I agree with you in principle, one also has to deal with the
reality as you find yourself in. In our case we have more experience
with Lustre than Ceph in an HPC and we got burned pretty badly by
Gluster. While I like Ceph in principle I haven't seen it do what
Lustre can do in a HPC setting over IB. Now it may be able to do that,
which is great. However then you have to get your system set up to do
that and prove that it can. After all users have a funny way of
breaking things that work amazingly well in controlled test environs,
especially when you have no control how they will actually use the
system (as in a research environment). Certainly we are working on
exploring this option too as it would be awesome and save many headaches.
Anyways no worries about you being a smartarse, it is a valid point.
One just needs to consider the realities on the ground in ones own
environment.
-Paul Edmon-
On 07/24/2018 10:31 AM, John Hearns via Beowulf wrote:
Forgive me for saying this, but the philosophy for software defined
storage such as CEPH and Gluster is that forklift style upgrades
should not be necessary.
When a storage server is to be retired the data is copied onto the new
server then the old one taken out of service. Well, copied is not the
correct word, as there are erasure-coded copies of the data.
Rebalanced is probaby a better word.
Sorry if I am seeming to be a smartarse. I have gone through the pain
of forklift style upgrades in the past when storage arrays reach End
of Life.
I just really like the Software Defined Storage mantra - no component
should be a point of failure.
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
