Dell EMC Avamar for VMware 19.7 User Guide

Configuring automatic proxy selection

The automatic intelligent proxy selection feature provides three different algorithms for determining which proxy to use to backup and restore operations. The algorithm can only be configured by manually modifying the mcserver.xml proxy_selection_algorithm setting.

1. Open a command shell and log in by using one of the following methods:
   • For a single-node server, log in to the server as admin.
   • For a multi-node server, log in to the utility node as admin.
2. Stop the MCS by typing the following command:
   dpnctl stop mcs
3. Open /usr/local/avamar/var/mc/server_data/prefs/mcserver.xml in a UNIX text editor.
4. Find the proxy_selection_algorithm entry key.
5. Change the proxy_selection_algorithm setting to one of the following values:
   • hot_add_preferred—The MCS intelligently prefers and automatically selects proxies based on hot-add capabilities. If none are found, then the MCS will fall back to using proxies without hot-add capabilities. This is the default setting.
   • hot_add_only—The MCS intelligently prefers and automatically selects proxies based on hot-add capabilities. If none are found, then the MCS will pause the backup or restore operation and wait for a hot-add capable proxy to become available.
   • ignore_associated_datastores—This setting causes known proxy-datastore associations to be ignored during the selection process. This allows the MCS to select a proxy from a larger pool of available proxies. Like the hot_add_preferred setting, proxies with hot-add capabilities are still preferred over proxies without hot-add capabilities. But if no hot-add capable proxies are found, then the MCS will fall back to using proxies without hot-add capabilities.
   For example:
   <entry key="proxy_selection_algorithm" value="hot_add_only" /> configures the automatic proxy selection mechanism to use the hot_add_only algorithm.
6. Close mcserver.xml and save your changes.
7. Start the MCS and the scheduler by typing the following command:

   dpnctl start mcs
   dpnctl start sched