How to execute workflows in multiple datacenters? #536
Description
3 datacenters.
dc0：1 host with 2 vms, vm0-vm1
dc1：1 host with 3 vms, vm2-vm4
dc2：1 host with 2 vms, vm5-vm6
20 cloudlets. I submitted the tasks all at once, in ascending order of their Task IDs. The allocation of cloudlets is as follows:
vm0->2 5 8 15 18
vm1->3 14
vm2->1
vm3->0 7 12 13
vm4->4 6 10 16 17 19
vm5->11
vm6->9
The cloudlet dependencies are shown in the figure below.
As can be seen from the console output log, the execution is blocked. It looks like only some of the tasks were executed, and I don't know how to solve this problem.
For each cloudlet, I have ensured that its ReceiveTasks are added before its ExecutionTasks, and its SendTasks are added after its ExecutionTasks. However, the order among the ReceiveTasks themselves is non-deterministic, and the order among the SendTasks is also non-deterministic.
I'm wondering if the order of adding ReceiveTasks affects their execution, and whether multiple datacenters need to be connected with a network topology. What should I do to get the simulation to run correctly? I would greatly appreciate it if you could help me with this issue.
The complete log output is as follows:
INFO Automatically enabling computation of utilization statistics for VMs on Host 0 could not be performed because it doesn't have VMs yet. You need to enable it for each VM created.
INFO Automatically enabling computation of utilization statistics for VMs on Host 1 could not be performed because it doesn't have VMs yet. You need to enable it for each VM created.
INFO Automatically enabling computation of utilization statistics for VMs on Host 2 could not be performed because it doesn't have VMs yet. You need to enable it for each VM created.
INFO
================== Starting CloudSim Plus 8.5.1 ==================
INFO 0.00: #Datacenter 1 is starting...
INFO org.cloudsimplus.network.switches.EdgeSwitch@2d6c620b is starting...
INFO 0.00: #Datacenter 3 is starting...
INFO org.cloudsimplus.network.switches.EdgeSwitch@2d6c6281 is starting...
INFO 0.00: #Datacenter 5 is starting...
INFO org.cloudsimplus.network.switches.EdgeSwitch@2d6c62f7 is starting...
INFO Broker 7 is starting...
INFO Entities started.
INFO 0.00: DatacenterBrokerSimple7: List of 3 datacenters(s) received.
INFO 0.00: DatacenterBrokerSimple7: Trying to create Vm 0 inside #Datacenter 1
INFO 0.00: DatacenterBrokerSimple7: Trying to create Vm 1 inside #Datacenter 1
INFO 0.00: DatacenterBrokerSimple7: Trying to create Vm 2 inside #Datacenter 1
INFO 0.00: DatacenterBrokerSimple7: Trying to create Vm 3 inside #Datacenter 1
INFO 0.00: DatacenterBrokerSimple7: Trying to create Vm 4 inside #Datacenter 1
INFO 0.00: DatacenterBrokerSimple7: Trying to create Vm 5 inside #Datacenter 1
INFO 0.00: DatacenterBrokerSimple7: Trying to create Vm 6 inside #Datacenter 1
INFO 0.00: NetworkHost: Vm 0 is booting up right away in Host 0/#DC 1, since no startup delay (boot time) was set.
INFO 0.00: VmAllocationPolicySimple: Vm 0 has been allocated to Host 0/#DC 1
INFO 0.00: NetworkHost: Vm 1 is booting up right away in Host 0/#DC 1, since no startup delay (boot time) was set.
INFO 0.00: VmAllocationPolicySimple: Vm 1 has been allocated to Host 0/#DC 1
WARN 0.00: VmAllocationPolicySimple: No suitable host found for Vm 2 in #Datacenter 1
WARN 0.00: VmAllocationPolicySimple: No suitable host found for Vm 3 in #Datacenter 1
WARN 0.00: VmAllocationPolicySimple: No suitable host found for Vm 4 in #Datacenter 1
WARN 0.00: VmAllocationPolicySimple: No suitable host found for Vm 5 in #Datacenter 1
WARN 0.00: VmAllocationPolicySimple: No suitable host found for Vm 6 in #Datacenter 1
INFO 0.10: DatacenterBrokerSimple7: Trying to create Vm 2 inside #Datacenter 3
INFO 0.10: DatacenterBrokerSimple7: Trying to create Vm 3 inside #Datacenter 3
INFO 0.10: DatacenterBrokerSimple7: Trying to create Vm 4 inside #Datacenter 3
INFO 0.10: DatacenterBrokerSimple7: Trying to create Vm 5 inside #Datacenter 3
INFO 0.10: DatacenterBrokerSimple7: Trying to create Vm 6 inside #Datacenter 3
INFO 0.10: NetworkHost: Vm 2 is booting up right away in Host 1/#DC 3, since no startup delay (boot time) was set.
INFO 0.10: VmAllocationPolicySimple: Vm 2 has been allocated to Host 1/#DC 3
INFO 0.10: NetworkHost: Vm 3 is booting up right away in Host 1/#DC 3, since no startup delay (boot time) was set.
INFO 0.10: VmAllocationPolicySimple: Vm 3 has been allocated to Host 1/#DC 3
INFO 0.10: NetworkHost: Vm 4 is booting up right away in Host 1/#DC 3, since no startup delay (boot time) was set.
INFO 0.10: VmAllocationPolicySimple: Vm 4 has been allocated to Host 1/#DC 3
WARN 0.10: VmAllocationPolicySimple: No suitable host found for Vm 5 in #Datacenter 3
WARN 0.10: VmAllocationPolicySimple: No suitable host found for Vm 6 in #Datacenter 3
INFO 0.20: DatacenterBrokerSimple7: Trying to create Vm 5 inside #Datacenter 5
INFO 0.20: DatacenterBrokerSimple7: Trying to create Vm 6 inside #Datacenter 5
INFO 0.20: NetworkHost: Vm 5 is booting up right away in Host 2/#DC 5, since no startup delay (boot time) was set.
INFO 0.20: VmAllocationPolicySimple: Vm 5 has been allocated to Host 2/#DC 5
INFO 0.20: NetworkHost: Vm 6 is booting up right away in Host 2/#DC 5, since no startup delay (boot time) was set.
INFO 0.20: VmAllocationPolicySimple: Vm 6 has been allocated to Host 2/#DC 5
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 0 to Vm 3 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 1 to Vm 2 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 2 to Vm 0 inside Host 0/#DC 1.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 3 to Vm 1 inside Host 0/#DC 1.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 4 to Vm 4 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 5 to Vm 0 inside Host 0/#DC 1.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 6 to Vm 4 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 7 to Vm 3 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 8 to Vm 0 inside Host 0/#DC 1.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 9 to Vm 6 inside Host 2/#DC 5.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 10 to Vm 4 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 11 to Vm 5 inside Host 2/#DC 5.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 12 to Vm 3 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 13 to Vm 3 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 14 to Vm 1 inside Host 0/#DC 1.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 15 to Vm 0 inside Host 0/#DC 1.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 16 to Vm 4 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 17 to Vm 4 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 18 to Vm 0 inside Host 0/#DC 1.
INFO 0.30: DatacenterBrokerSimple7: Sending Cloudlet 19 to Vm 4 inside Host 1/#DC 3.
INFO 0.30: DatacenterBrokerSimple7: All 20 waiting Cloudlets submitted to some VM.
INFO 142.31: DatacenterBrokerSimple7: Cloudlet 1 finished in Vm 2 and returned to broker.
INFO 144.40: NetworkVm: Requesting Vm 2 destruction on Host 1/#DC 3. Shutdown will finish immediately (since no Vm shutDownDelay was set).
INFO 144.40: #Datacenter 3: Vm 2 destroyed on Host 1/#DC 3.
INFO 162.21: DatacenterBrokerSimple7: Cloudlet 0 finished in Vm 3 and returned to broker.
INFO 200.40: DatacenterBrokerSimple7: Cloudlet 2 finished in Vm 0 and returned to broker.
INFO 302.32: DatacenterBrokerSimple7: Cloudlet 4 finished in Vm 4 and returned to broker.
INFO 382.43: DatacenterBrokerSimple7: Cloudlet 7 finished in Vm 3 and returned to broker.
INFO 480.61: DatacenterBrokerSimple7: Cloudlet 3 finished in Vm 1 and returned to broker.
INFO 640.72: DatacenterBrokerSimple7: Cloudlet 5 finished in Vm 0 and returned to broker.
INFO 640.72: DatacenterBrokerSimple7: Cloudlet 14 finished in Vm 1 and returned to broker.
INFO 642.72: NetworkVm: Requesting Vm 1 destruction on Host 0/#DC 1. Shutdown will finish immediately (since no Vm shutDownDelay was set).
INFO 642.72: #Datacenter 1: Vm 1 destroyed on Host 0/#DC 1.
INFO 1242.54: DatacenterBrokerSimple7: Cloudlet 6 finished in Vm 4 and returned to broker.