Nope, hyperthreading should be fine.
I strongly suspect that addresses per subnet in eucalyptus.conf is either set to 64 (that will give you 61 instances max and is consistent with your behavior) or you increased the value but didn't restart the CC (it need to "cleanrestart").
Can you post your eucalyptus.conf?
thanks neil
Nope, hyperthreading should be fine.
I strongly suspect that addresses per subnet in eucalyptus.conf is either set to 64 (that will give you 61 instances max and is consistent with your behavior) or you increased the value but didn't restart the CC (it need to "cleanrestart").
Can you post your eucalyptus.conf?
thanks
neil