You can define condensed host groups to display information for its hosts as a summary for the entire group. This is useful because it allows you to see the total statistics of the host group as a whole instead of having to add up the data yourself. This allows you to better plan the distribution of jobs submitted to the hosts and host groups in your cluster.
To define condensed host groups, add a CONDENSE column to the HostGroup section. Under this column, enter Y to define a condensed host group or N to define an uncondensed host group, as shown in the following:
Begin HostGroupGROUP_NAME CONDENSE GROUP_MEMBERgroupA Y (hostA hostB hostD)groupB N (hostC hostE)End HostGroup
The following commands display condensed host group information:
Use bmgroup ‑l to see whether host groups are condensed or not.
If you configure a host to belong to more than one condensed host group using wildcards, bjobs can display any of the host groups as execution host name.
For example, host groups hg1 and hg2 include the same hosts:
When the membership of a host group changes frequently, or when the group contains a large number of members, you can use an external executable called egroup to retrieve a list of members rather than having to configure the group membership manually. You can write a site-specific egroup executable that retrieves host group names and the hosts that belong to each group. For information about how to use the external host and user groups feature, see External Host and User Groups.