When running a ftbfs run on both euca and openstack I started to see some
pretty big differences in performance. CPU and mem were all the same or
close enough so I decided to look at disk performance.
euca is backed by local disks in a raid/lvm layout and/or exported via
iscsi through the Storage Controller.
openstack is using a replicated/distributed gluster for all disk back
ends - including ephemeral (local) and volume-backed (iscsi)
Results are here and are kinda staggering:
http://skvidal.fedorapeople.org/misc/cloudbench.txt
in short - gluster performance really bogs us down for building in the
cloud instances.
thoughts on improving that performance or do we simply want to have
certain workloads in euca specifically b/c the disks are more disposable
and/or faster?
-sv
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