On 11/28/2012 6:53 AM, Stefan Priebe - Profihost AG wrote:
Hi Dan,
thanks for your update / new import-export branch.
The import seems to work now. What i'm wondering is that it is really
slow.
I see around 10% CPU Usage on importing host (host where rbd import is
started) and just 4MB every 2s raising Data on ceph. This means 40GB
took around 5-6 hours.
Night this be due to he size update? 4MB every 2s looks like the
stripe size.
I did change the resize to double each time to help with that before
pushing to master, but that still seems awfully slow. You should
definitely use the
version in the mainline, though; it's better in several ways.
Are these particularly sparse images? I'm testing a "preserve
sparseness" tweak that should help
a lot if so (and save space in the cluster, obviously).
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