[Xen-API] Poor xapi Performance Exporting/Importing VM's on XCP 1.6

[Bastian Mäuser <mephisto@xxxxxxxxx>]

Hi Guys,

i just put a little Cluster in Testing with XCP 1.6... The most strange
thing i noticed is the really really slow imports and explorts of the
xen-api...

When migrating VM's from my 1.1 to the 1.6 Cluster i do export them onto
a NFS Share with one pool, and re-import them on the 1.6 pool.

Export on the 1.1 Cluster is really ok. I think about 200-300mbit/s net,
maybe the NFS Server is here the limiting Component.

Import/Export in/from the 1.6 Cluster is a hell.

Yesterday it took my awesome 487 Minutes to export a VM of roughly 40gb:

[root@xcp2 615824d1-1aeb-7054-cc07-417ba25c78f0]# time xe vm-export
vm=rsa2 filename=rsa2-test-unc.xva compress=false
Export succeeded

real    487m33.284s
user    0m25.810s
sys     6m26.960s

[root@xcp2 615824d1-1aeb-7054-cc07-417ba25c78f0]# ls -lah|grep rsa2
-rw------- 1 nfsnobody nfsnobody  38G 18. Dez 04:50 rsa2-test-unc.xva

Exporting that VM from the Other Cluster takes about 35 Minutes..

Network + Hardware is fine... Inside a VM on the 1.6 Cluster I get about
55mb/s Disk performance.. and about 45mb/s to the NFS Server.

I've spend quite some time now to find out where the Bottleneck ist..

Any Ideas on that?

thanks,
Bastian

_______________________________________________
Xen-api mailing list
Xen-api@xxxxxxxxxxxxx
http://lists.xen.org/cgi-bin/mailman/listinfo/xen-api