Discovering mainframe computers
Mainframe computers are powerful computers that tend to be used by large organizations for critical bulk data processing. They are characterized by high reliability and security, strict backward compatibility with older software, high utilization rates, and very large data throughput.
For a description of how a mainframe is represented in BMC Discovery, see Viewing a mainframe.
The following topics are covered in this section:
Configuring mainframe discovery
BMC Discovery performs mainframe discovery as part of a normal discovery scan. When discovery heuristics indicate that a mainframe computer is on a particular IP address, the methods unique to mainframe discovery are initiated. Mainframe discovery methods use an agent (the z/OS Discovery Agent), which is installed on the mainframe to collect information from the BMC MainView instance on each logical partition (LPAR).
BMC Discovery for z/OS agent
BMC Discovery cannot natively discover z/OS systems and requires BMC Discovery for z/OS (a separately licensed product) to be installed on the z/OS systems. Unless the support ID you use has been registered as licensed for this additional product, you might be unable to see the references linked to on this page. If you need to discuss this issue further, contact your BMC sales representative.
Discovering all mainframes and LPARs
To discover all mainframes and LPARs, a BMC Discovery for z/OS agent must be installed on every LPAR. Where LPARs are connected through CAS-to-CAS communication (known as a CASPlex), at least one MainView Explorer (host server) must be running on each CASPlex. You must then scan the IP addresses for each of the MainView Explorer instances.
Where LPARs are not connected through the CAS, a MainView Explorer (host server) instance must be running on each LPAR.
For information about installing and configuring BMC Discovery for z/OS Agent, see the BMC Discovery for z/OS Agent Installation Guide available from the BMC support site.
Mainframe discovery limitations
Mainframe discovery only supported over IPv4
Mainframe discovery is supported only over IPv4 as BMC MainView, on which the agent relies; it is not supported on IPv6.
Required z/OS Discovery Agent version
Supported versions of the z/OS Discovery Agent are 1.6 and 1.7. Version 1.7 enables discovery of peer-to-peer and client-server relationships between Software Instance nodes. To enable discovery by BMC Discovery, the z/OS Discovery Agent must be patched according to Technical Bulletin 172149. This bulletin is available from the BMC support site: Navigate to BMC Discovery for z/OS and choose the document "Describes BMC Discovery for z/OS License Add-On 1.6.00 requirements for BMC Discovery 8.2.0."
LPAR naming and SMF ID
BMC Discovery sets the names of LPARs (the CAS system names) on the
__discovery_context attribute of the DiscoveredMainframe node. Sometimes these names are not the same as the SMF ID of the LPAR that the agent returns to BMC Discovery. In such cases, there might be partial or no results for discovery methods other than
getMainframeInfo. The following Program Temporary Fixes (PTFs) address this issue:
- BMC Discovery for z/OS Agent 1.6—PTFs BPA1472 and BPA1473.
- BMC Discovery for z/OS Agent 1.7—PTFs BPA1479 and BPA1480.
Multiple mainframe discovery
Multiple Mainframe nodes can be created in the inferred model. A scan of a BMC Discovery for z/OS agent results in only one inferred mainframe (the one on which the agent is running). The following illustration shows an example visualization.
A separate agent must be configured for each additional mainframe to be discovered, even if agents for the mainframes are communicating with one another and each agent can gather details of more than one mainframe.
The ability to infer multiple Mainframe nodes depends on the BPA1401 PTF being applied on the BMC Discovery for z/OS agent. If the PTF is not applied, BMC Discovery will not be able to infer multiple mainframes (the orphan nodes previously described, however, will no longer be created), behavior that existed in version 8.2.01 of the product.
Optional Additional Discovery Tools
Views 49Z, 4HZ, and 4WZ (requested as View 49HWZ)—Requires MainView for WebSphere, Application Server, and MainView Transaction Analyzer products to be installed
Views 1IZ and 1XZ (requested as View 1IXZ)—Requires MainView for DB2 and MainView for IMS products to be installed
Views 1IJZ, 1ILZ and 1IKZ (requested as View 1IJKLZ)—Requires MainView for DB2 product to be installed
Views 5UZ, 5VZ, and 5NZ (requested as View 5NUVZ)—Requires MainView for WebSphere MQ product to be installed
Views 0Z, 1Z, 2Z, 3Z, 4Z, 5Z, 6Z, and 7Z (requested as View 01234567Z)
View 0YZ—Requires MainView for CICS and MainView for IMS products to be installed
Although the DB2/IMS/MQ/CICS servers are discovered, this detailed data is not available in a z/OS Discovery Agent-only installation.
To discover a mainframe computer, you must have a z/OS user ID and password pair that is also defined in RACF, ACF2, Top Secret, or other external security managers. You configure the credential on the Management Systems tab on the Discovery Credentials page.
For more information about mainframe credentials, see Configuring mainframe credentials.
For information about configuring security for the BMC Discovery for z/OS Agent, see the BMC Discovery for z/OS Agent Installation Guide.
Enabling additional mainframe methods
You can view the methods for mainframe discovery by clicking Mainframe Discovery on the Discovery Platforms page. The following mainframe methods are disabled by default, because they are not required for a basic discovery:
Enabling the remaining mainframe discovery methods
To enable the remaining discovery methods:
- From the main menu, click the Administration icon.
The Administration page opens.
- In the Discovery section, click Platforms.
- Select Mainframe.
- Select the Enable link in the following rows:
getDiskDrive(see the first note following this procedure)
- From the Discovery tab, select Knowledge Management.
- Click Create Pattern.
- From Pattern Templates:
- For the
- For the
- For the
- For the
- Edit the patterns according to the instructions contained in the comments.
You must add a single trigger for each pattern contained in the template. For more information, see Pattern templates.
getDiskDrive and getTapeDrive with CMDB Synchronization
getTapeDrive in a system in which CMDB synchronization is used causes a large number of CIs to be created.
You can view and download an example pattern module created from the templates here.
Mainframe discovery and CMDB synchronization
For versions of BMC Atrium CMDB earlier than 7.6.03, you must apply the mainframe extension,
extension-703-800-Mainframe.zip, to use CMDB synchronization with mainframe discovery. For information about setting up CMDB synchronization and applying BMC Atrium CMDB extensions, see Preparing BMC Atrium CMDB for synchronization.