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HDVM slow allocated ldevs display

Question asked by Joao Serra on Aug 27, 2014
Latest reply on Sep 9, 2014 by Joao Serra

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Hi,

We have a customer with the following symptom:

Opening the allocated tab takes around 4 minutes. There are around 300 ldevs which isn't a big value. We manage to identify what is taking time by filtering by host type and found out that only the VMWARE assigned ldevs take time to show up.

Since this is a small and fairly new install, we decided to re-install HDVM from scratch. At first, the problem seemed to solved but we are back to the same situation right after the customer added the VmWare hosts to HDVM.

It seems that HDVM does some kind of host probing every time allocated storage in invoked or when we try to see what luns are associated with a ESX host.

Does anyone had this issue.

Regards.

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Dang Luong

Aug 27, 2014 11:53 PM

Hi Joao,

Device Manager doesn't automatically poll hosts whenever the user clicks into Allocated Volumes. It polls registered hosts usually once a day at a set time. With ESX hosts, the user has to initiate a manual refresh.

What version of HCS is this? It's best to open a case so Support can look at the logs in details.

Regards,

Dang Luong

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Joao Serra @ Dang Luong on Aug 28, 2014 1:48 AM

Hi Dang.

The only thing that made us think of that possibility was the fact that things only get slow after the ESX hosts are registered on Device Manager. When we started from scratch, and only the Storage was registered, asking for allocated ldevs takes a couple of seconds. As soon as we register the ESX hosts, it takes minutes.

We are working with version 8.0.1-00.

Any way, you are right: A case must be opened.

Regards.

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Joao Serra @ Dang Luong on Sep 5, 2014 9:14 AM

Hi Dang.

Tests made onsite seem to disagree with what you say about the ESX hosts not being "poked" every time we display the allocated devices.

After removing the ESX hosts that were added with their IP and credentials and adding them back manually (just name and wwns), the display time dropped from 5 minutes to 10 seconds.

Regards.

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Dang Luong

@ Joao Serra on Sep 9, 2014 9:14 AM

Hi Joao,

That's an interesting find. Let me double check the behavior in our lab.

Regards,

Dang Luong

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Dang Luong

@ Joao Serra on Sep 9, 2014 12:45 PM

Dear Joao,

I didn't get the long wait in my environment like you did. I allocated 300 volumes from a HUS array to an ESXi 5.1 host. HCS was able to display Open-Allocated in a couple of seconds. I also went to the ESXi server under the Hosts view and the response was also just as quick. I'm using HCS 8.0.1, too.

Let me know what Support tells you after they've gotten a chance to look at your environment.

Regards,

Dang Luong

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Joao Serra @ Dang Luong on Sep 9, 2014 1:59 PM

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6 Replies

Dang Luong Aug 27, 2014 11:53 PM
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Hi Joao,

Device Manager doesn't automatically poll hosts whenever the user clicks into Allocated Volumes. It polls registered hosts usually once a day at a set time. With ESX hosts, the user has to initiate a manual refresh.

What version of HCS is this? It's best to open a case so Support can look at the logs in details.

Regards,
Dang Luong
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- Joao Serra @ Dang Luong on Aug 28, 2014 1:48 AM
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  Hi Dang.
  
  The only thing that made us think of that possibility was the fact that things only get slow after the ESX hosts are registered on Device Manager. When we started from scratch, and only the Storage was registered, asking for allocated ldevs takes a couple of seconds. As soon as we register the ESX hosts, it takes minutes.
  
  We are working with version 8.0.1-00.
  
  Any way, you are right: A case must be opened.
  
  Regards.
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- Joao Serra @ Dang Luong on Sep 5, 2014 9:14 AM
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  Hi Dang.
  
  Tests made onsite seem to disagree with what you say about the ESX hosts not being "poked" every time we display the allocated devices.
  After removing the ESX hosts that were added with their IP and credentials and adding them back manually (just name and wwns), the display time dropped from 5 minutes to 10 seconds.
  
  Regards.
  
  JS
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  - Dang Luong @ Joao Serra on Sep 9, 2014 9:14 AM
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    Hi Joao,
    
    That's an interesting find. Let me double check the behavior in our lab.
    
    Regards,
    Dang Luong
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  - Dang Luong @ Joao Serra on Sep 9, 2014 12:45 PM
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    Dear Joao,
    
    I didn't get the long wait in my environment like you did. I allocated 300 volumes from a HUS array to an ESXi 5.1 host. HCS was able to display Open-Allocated in a couple of seconds. I also went to the ESXi server under the Hosts view and the response was also just as quick. I'm using HCS 8.0.1, too.
    
    Let me know what Support tells you after they've gotten a chance to look at your environment.
    Regards,
    Dang Luong
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    - Joao Serra @ Dang Luong on Sep 9, 2014 1:59 PM
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HDVM slow allocated ldevs display

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