Hi,
I have a question about architecture:
Normally it is recommended to build a Ceph Cluster within one Data
center. In a Data center I have a network with 1Gbit/s and it is working
great with my Kubernetes Cluster running in the same data center.
For more reliability I plan to add ceph nodes running in a different
data center. The data centers are not connected directly and need to
communicate via public IPs. I did some tests and - not surprising - the
network performance is going down to 500Mbit/s between two nodes in two
different data centers.
My questions are:
1. Is 500Mbit/s to slow to run a ceph cluster?
2. Is it a bad idea to build a Ceph Cluster with nodes in different
data centers if the network bandwith is only 1Gbit/s?
The background: My idea was that the cluster becomes more robust because
I am no longer bound to a single data center (which also implies a
vendor lock-in).
What is your opinion about this idea running nodes in different data
centers?
Thanks in advance
====
Ralph
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