Adding multiple disks using SDRS on VRO

[sdeva]

I am trying to add 3 disks to an existing VM using the storaepod, I am using the below statement to add the disk using storage DRS recommendation

myVcTask = managedObject.applyStorageDrsRecommendation_Task(myKey);

I am trying to add multiple disks the vim3waittask is not passing one request at a time, it sends all the request at same time and it fails. Do we have any other option to wait for a task to complete and then trigger the other pending tasks.

[iiliev]

I'm not sure I fully understand the problem here. How exactly do you start the 3 tasks? vim3WaitTaskEnd will wait for a task to complete, but if you start multiple tasks in parallel it won't magically execute them one after the other; it is responsibility of your code to not run the next task until the waiting for the previous one with vim3WaitTaskEnd completes.

[sdeva]

I am using a for loop to create multiple disks using sdrs, it creates 3 tasks at same time. Can you please provide any sample code to limits one task at a time.

[iiliev · Accepted solution]

You can check how it is used in the existing workflows, for example in the workflow Mass migrate virtual machines with storage vMotion (available under Library > vCenter > Virtual Machine management > Move and Migrate).

The basic idea is to create one task at a time and wait for it to complete, before going to the next task. For example, if your loop code looks something like this

for (var i in myarray) {
  myVcTask = managedObject.applyStorageDrsRecommendation_Task(myKey);
  ... // other code inside loop
}

you can change it to something like this

for (var i in myarray) {
  myVcTask = managedObject.applyStorageDrsRecommendation_Task(myKey);
  actionResult = System.getModule("com.vmware.library.vc.basic").vim3WaitTaskEnd(myVcTask, progress, pollRate);
  ... // other code inside loop
}

where progress parameter is a boolean value which configures whether the log progress while waiting for the task to complete, and pollRate is a number value which configures the polling rate for the task status in seconds.

[sdeva]

Thanks llian I was able to fix the code based on your suggestion and it worked fine. I was able to execute one task at a time.  Again thanks for your time and help.