Below is my sample code. First time when connecting to VC it takes about 6s and second time it takes under a second.
Searching for resource pool takes about 5 sec and then about 0,5s for VM's from this pool. In second run takes about 0,5s to find each VM without resource pool as starting point.
Why is second run so much faster and what do I need to cache if I always want this speed ?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using VMware.Vim;
using System.Collections.Specialized;
namespace VcTest
{
class Program
{
public static VimClient client;
static void Main(string[] args)
{
string host = "hostname";
string user = "username";
string pass = "password";
string resourcePool = "resource pool name";
connectToVc(host, user, pass);
ResourcePool rp = getRP(resourcePool);
string[] VMs = { "vm-24657", "vm-24705", "vm-24682", "vm-21925", "vm-26977" }; //five random selected vm's from resourcePool
foreach (string VMid in VMs)
{
getVM(VMid, rp.MoRef);
}
client.Disconnect();
client = null;
Console.WriteLine("Round two \n");
System.Threading.Thread.Sleep(5000);
connectToVc(host, user, pass);
foreach (string VMid in VMs)
{
getVM(VMid, null);
}
client.Disconnect();
Console.Read();
}
public static void connectToVc(string host, string user, string pass)
{
Console.WriteLine("Connecting...");
client = new VimClient();
DateTime start = DateTime.Now;
ServiceContent sc = client.Connect(host, CommunicationProtocol.Https, 443);
UserSession session = client.Login(user, pass);
DateTime stop = DateTime.Now;
Console.WriteLine("Time elapsed: " + (stop - start).TotalMilliseconds);
}
public static void getVM(string VMId, ManagedObjectReference searchStart)
{
NameValueCollection filter = new NameValueCollection();
filter.Add("Summary.vm", VMId);
DateTime start = DateTime.Now;
VirtualMachine vm = (VirtualMachine)client.FindEntityView(typeof(VirtualMachine), searchStart, filter, null);
DateTime stop = DateTime.Now;
Console.WriteLine("Searching for VM, name: " + vm.Name + " id: " + VMId + " took " + (stop - start).TotalMilliseconds + "ms\n");
}
public static ResourcePool getRP(string RPname)
{
NameValueCollection RPfilter = new NameValueCollection();
RPfilter.Add("name", RPname);
DateTime start = DateTime.Now;
ResourcePool rp = (ResourcePool)client.FindEntityView(typeof(ResourcePool), null, RPfilter, null);
DateTime stop = DateTime.Now;
Console.WriteLine("Searching for Resource Pool, name: " + rp.Name + " took " + (stop - start).TotalMilliseconds + "ms\n");
return rp;
}
}
}
Best regard, Primoz.
