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Storage Library MIB

Storage Library MIB. Jeff Bain, HP Andrea Westerinen, SNIA. Topics. Storage Media Libraries How is the MIB designed? What is CIM and how is it mapped into SNMP? Contents of the MIB Advantages of this approach. What are Storage Libraries?.

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Storage Library MIB

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  1. Storage Library MIB Jeff Bain, HP Andrea Westerinen, SNIA

  2. Topics • Storage Media Libraries • How is the MIB designed? • What is CIM and how is it mapped into SNMP? • Contents of the MIB • Advantages of this approach

  3. What are Storage Libraries? • Also called Autochangers, Libraries, Autoloaders, Jukeboxes • An encloser containing: • Slots or magazines for holding media, and drives (DLT tape, Magneto-optical, DAT, etc.) for playing media • Pickers/changers to grab and transport media, and “ports” to import/export media • Power supplies, fans, displays, keypads, etc. • LAN connectivity and agents to handle SNMP requests • Generally connected to one or more SCSI buses, or fibre channel Storage Area Networks (SANs)

  4. Library Management Today • Currently, library vendors define their own proprietary MIBs • Difficult for backup and management applications (and end-users) to get a unified view of their libraries

  5. How Is the MIB Designed? • Objects, properties, and associations to describe libraries are defined in CIM v2.2 • Based on input from leading library vendors • These CIM library objects, properties, etc. are “mapped” into a MIB

  6. What Is CIM? • Common Information Model from the Distributed Management Task Force (DMTF) • Object-oriented model defining managed entities in the enterprise • Inheritance and abstraction • Classes, properties, methods, and associations • Divided into logical and physical sections • Includes objects for Storage Media Libraries, drives, pickers/changers, label readers, etc.

  7. CIM to MIB Mapping

  8. Graphical Example

  9. Explanation of Example • Multiple instances described using a table • Same approach (using a table) employed when describing array properties • Same approach (using a table) employed when describing that the object participates in multiple “copies” of an association • Property named ScalarProperty is included in both FooObject and BarObject - Through abbreviations in the MIB field names, avoid name duplication

  10. “Objects” in CIM and the MIB

  11. “Other” CIM Info, In Progress • SCSI Information • Power Supply and Fan data • Fibre Channel information

  12. CIM and SNMP Cooperation

  13. Advantages of Approach • CIM is an industry-standard information model, adopted by SNIA and Sun's JIRO/FMA • Eliminates confusion and abstracts protocols, interfaces and vendor-specific implementations • Can present a complete picture of an “enterprise” • Allows vendor differentiation by extending/subclassing the standard • Most library vendors have an SNMP agent • HTTP/XML support is also defined

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