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Just my quick two cents here.
Technically this is possible which doesn't mean it's a good idea.
I wouldn't use such a setup in a productive environment. I don't
think they'll really save a lot and adding the latency etc on top
not sure this is what they're really looking for.
Just for testing and for giving it a try, sure but for the rest I
would go with a clear "no" instead of encouraging them to do
that.
Maybe you can tell use more about their use-case? What are they
looking for, how large should this get, access protocols etc.
Kai
On 22.08.19 17:12, Brett Chancellor
wrote:
It's certainly possible. It makes things a little
more complex though. Some questions you may want to consider
during the design..
- Is the customer aware this won't preserve any
data on the luns they are hoping to reuse.
- Is the plan to eventually replace the SAN with
JBOD, in the same systems? If so you may want to make your
luns look like the eventual drive size and count.
- Is the plan to use a few systems with SAN and
add standalone systems later? Then you need to calculate
expected speeds and divide between failure domains.
- Is the plan to use a couple of hosts with SAN
to save money, and have the rest be traditional Ceph storage?
If so consider putting the SAN hosts all in one failure
domain.
- Depending on the SAN you may consider aligning
your failure domains to different arrays, switches, or even
array directors.
- Remember to take the hosts network speed into
consideration when calculating how many luns to put on each
host.
Hope that helps.
-Brett
Hi
Yesterday one of our
customers asked us a strange request. He asked us
to use SAN as the Ceph storage space to add the SAN
storages it currently has to the cluster and reduce
other disk purchase costs.
Anybody know can we do
this or not?! And if this is possible how we should
start to architect this Strange Ceph?! Is it good or
not?!
Thanks for your help.
Mohsen Mottaghi
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