Micro Focus Enterprise Developer 3.0 for Visual Studio 2013 > Deployment > Configuration and Administration > Enterprise Server Security > Securing an Enterprise Server Installation > MLDAP ESM Module > Resource Access Control > Resource Access Control Lists > "Use all groups" Mode

"Use all groups" Mode

Normally, only the user's signon group is used when checking for group permissions for a resource, for performance reasons. If the option "Use all groups" is enabled in MFDS for the current Enterprise Server server, however, users will automatically have the permissions of all the groups they currently belong to. (In this case the signon group is unimportant.) This is equivalent to the "List-of-groups processing" available as an option in some mainframe security facilities, or the usual behavior of UNIX and Microsoft Windows.

Note: Use-all-groups mode consumes additional resources (notably CAS shared memory, when running under CAS) for the list of group names and the per-user group membership information. Also, it requires additional LDAP searching and processing during Verify operations, and additional processing during Auth and XAuth operations. (It is especially expensive when operating on ACLs that include wildcarded group names, such as "allow:x* group:update", which would apply to all groups with names beginning with "x".)

When use-all-groups mode is in effect, there is a configurable limit to the number of user groups. (The limit applies to the number of groups that include users who have signed on since the region was started, so groups that are defined but not used don't count against it.) See [Operation] section.

If you have stacked multiple MLDAP ESM Modules in your security configuration, there are special considerations for use-all-groups mode. See the sections on Federation and maxgroups for more information.