Introduction

This article discusses the hotadd_transport.enabled key in the vmPro registry. It consists of the following sections:

 

• Key Information
• Details
• Confirming That hotadd_transport Is Enabled 

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Key Information

Key:

hotadd_transport.enabled

 

Function:

Enables the HotAdd feature, which allows you to add and remove SCSI virtual hard disks while your vmPRO is running, for all folders.

 

Possible Setings:

Boolean (0 or 1)

 

Meaning of Setting:

0 is disabled

1 is enabled

 

Configuring this Key:

To configure this registry key:

 

1. From the GUI, select Configure > Advanced Settings.
2. Checkmark the Enable HotAdd Transport for all folders by default check box, as shown below. 

 

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Details

Note: Invidual folders can also be set to attempt HotAdd or NDB as a transport method. However, there is no registry key for the individual folder option.The folder being set to HotAdd has been observed in the contoller log as logging an entry to update the psql database.

 

Controller logging:

 

2014-01-13 14:41:11: controller/WARNING:: GenericData.py:514 Unable to detect gen_id on record during update. Probably written without a read, stmt "UPDATE folder SET gen_id = CASE WHEN gen_id IS NULL THEN 0 ELSE gen_id END +1, cbt_reset_schedule={"cycle":[0],"min":30,"days":[],"hr":3,"week":["sun"]}, transport_method=hotadd, name=10.20.230.15, uuid=740a5979-9b0e-4c9b-9b66-322404f4d432 WHERE uuid=740a5979-9b0e-4c9b-9b66-322404f4d432". dbWrite from: ControllerCommands.pyc:1825

 

To view the controller's last update of the sql, check the psqldump.output file in /var/ of the support bundle. The folder can be identified by the 'label' entry. The transport method is the transport_method_description.

 

Sample output of psqldump:

 

12039 2 0cf025a6-a2e0-4d58-a3fc-d1b2d09662fc folder_update {"transport_method": "hotadd", "uuid": "740a5979-9b0e-4c9b-9b66-322404f4d432", "transport_method_description": "HotAdd / NBD", "numVms": 29, "cbt_reset_schedule": "{\\"cycle\\":[0],\\"min\\":30,\\"days\\":[],\\"hr\\":3,\\"week\\":[\\"sun\\"]}", "label": "10.20.230.15", "total_exported_vm_size": "3196.0 GB", "cbt_reset_schedule_description": "Reset every Sunday at 3:30", "name": "10.20.230.15"} c1dfc7706ea011e3b81c000c292f20f8 -1 1389652675.11147 1389652675.2653501 1389652675.3446889 102 0   19871 \N \N

 

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Confirming That hotadd_transport is Enabled

• From the vmPRO GUI, select Help > vmPRO System. Select the Log Files tab. Select datastore_fs. Look for the message Obtained (and using) Transport Mode: hotadd.
   
• In the vSphere client, right click your vmPRO VM and select Edit > Settings. Select the Hardware tab and verify that a new virtual disk is added to the vmPRO each time a new disk is copied.