Hi friends.
I'm evaluating different DFS to increase our infrastructure from 10
nodes to 40 nodes approximately. One of the bottleneck is the shared
storage installed to enable the live-migration.
Well, the selected candidate are NFS, Ceph or Lustre (which is already
installed for HPC purpose)
With Ceph, you'll want to use RBD instead of CephFS, we had OpenStack live
migration working with Ceph RBD for about a year and a half now, here's a
PDF slide deck with some details:
https://drive.google.com/open?id=0BxYswyvIiAEZUEp4aWJPYVNjeU0
If you take CephFS and the bottlenecks associated wit
Hi Dmitry
After reading CephRDB the impressions were extremely good and even
better than CephFS to ephemeral storage. Are you using qcow2 or raw
type? I prefer qcow2, but in this case we cannot enable the writing
cache in the cluster reducing a bit the performance. I should test the
CephRDB p
Miguel,
For RBD in Openstack, you will want to use raw images (even convert them
while loading them into glance). The reason being is this enables the copy
on write functions in RBD that allows for the image to be 'cloned' quickly.
Not using raw will only impact storage sizes in glance since the c
Great Andrew, thanks for the helpful clarification. The copy-on-write
cloning is a crucial point for the "instant" boot of instances. Raw +1
with RBD.
Miguel.
El 24/06/15 21:19, Andrew Woodward escribió:
Miguel,
For RBD in Openstack, you will want to use raw images (even convert
them while
