Printer Friendly
The Free Library
22,728,960 articles and books

SMI takes it place in storage annals: SNIA waves storage standard banner.

SANs, with its many-to-many architecture, can be extremely useful, in that different departments and applications can use a many-to-many model: sharing connectivity between their servers and applications to multiple storage arrays. This usually results in higher returns of investment and better resource utilization. In reality, however, the SAN really is useful but it's hard to manage. Each storage device comes with its own management interface and ways of doing things--tape libraries, whatever. There are software approaches that try to capture these interfaces and present them in a unified context, but this requires a tremendous amount of behind-the-scenes (and sometimes cutthroat cut·throat Â 
1. A murderer, especially one who cuts throats.

2. An unprincipled, ruthless person.

3. A cutthroat trout.

1. Cruel; murderous.

) vendor API (Application Programming Interface) A language and message format used by an application program to communicate with the operating system or some other control program such as a database management system (DBMS) or communications protocol.  sharing. Also, these interfaces are not terribly useful among multi-vendor environments, since these machines don't always talk well to each other.

This has resulted in several management stovepipes that do not communicate particularly well, including processor complex management, network management, database management, application management and storage management.

Storage management is particularly a sticky wicket sticky wicket
n. Informal
A difficult or embarrassing problem or situation.

sticky wicket

on a sticky wicket Informal in a difficult situation
. Storage managers are faced with managing multiple management applications, most of which do not speak to each other. Locating and fixing system degradation in this environment is a challenge to say the least. For example, while tracking failing service levels on an RDMBS writing to a RAID subsystem, the storage administrator must delve through multiple storage stovepipes to find and fix the issue.

There is some level of interoperability between stovepipe management applications, but these depends on vendors exchanging management APIs--interface code that allows a vendor to somewhat integrate their package with another's. Since the companies are likely in competition, and API sharing requires endless updates and negotiation, you can imagine how well this goes over in real life.

Nevertheless, customers demand integration and put teeth in their demands by requiring interoperability levels in their RFPs. Like it or not, storage vendors have to achieve interoperable levels and are looking to automate the process.

Enter SMI (1) (Storage Management Initiative) The initiative developed by the SNIA in 2003 to create a single standard interface for storage management technologies used by multiple vendors and networking communities.  and SMI-S SMI-S Storage Management Initiative - Specification (SNIA)  

SMI, which is the storage piece of the broader CIM (1) (Computer-Integrated Manufacturing) Integrating office/accounting functions with automated factory systems. Point of sale, billing, machine tool scheduling and supply ordering are part of CIM.  standard, provides a highly functional and interoperable interface for managing multi-vendor storage devices. SMI grew out of Bluefin, which predictably changed names when SNIA (Storage Networking Industry Association, San Francisco, CA, An organization devoted to the advancement of mission critical storage systems. Founded in 1997, its goal is to determine the standards that must be developed to allow hosts and storage systems to interact via  adopted it. Bluefin was the first industry standard SAN management interface. It's meant to broaden the SAN's usefulness and thereby increase adoption, both in the Fortune 1000 data centers which make up the bulk of SAN customers and, hopefully, into the mid-range market. Up until now they have largely steered away from widescale SAN management, citing interoperability, complexity and cost concerns. The storage industry hopes that the better and more widespread storage standards become, the simpler and less costly SANs will be to deploy and manage.

Building on previous CIM/WBEM development, SNIA adopted the work on storage specs and launched SMI (Storage Management Initiative) to help storage vendors adopt a sophisticated open interface. The result, a standard for managing storage networks, is SMI-S (Storage Management Initiative Specification). SMI-S provides a way for storage vendors to develop simplified and highly interoperable management applications. SNIA suggests that this will reduce the cost of storage management by providing:

* Interoperability: The ability to manage a heterogeneous storage network from a single console.

* Integration: Eliminates the need to manage each device with a separate management application.

* Choice: Allows any conforming devices in the SAN to be discovered and controlled regardless of manufacturer.

The DMTF (Distributed Management Task Force, Inc., Portland, OR, An industry consortium founded in 1992 that is involved with the development, support and maintenance of management standards for PCs. Its goal is to reduce the cost and complexity of PC management.  (Distributed Management Task Force Distributed Management Task Force (DMTF, formerly "Desktop Management Task Force") is a standards organisation that develops and maintains standards for systems management of IT environments in enterprises and the Internet. ) originally developed CIM (Common Information Model) and WBEM (Web-Based Enterprise Management) An umbrella term for using Internet technologies to manage systems and networks throughout the enterprise. Both browsers and applications can be used to access the information that is made available in formats such as HTML and  (Web-Based Enterprise Management (standard, system management) Web-Based Enterprise Management - (WBEM) A DMTF management standard using the Common Information Model to represent systems, applications, networks, devices and other managed components; developed to unify the management of distributed computing ) standards. DMTF members turned over the storage component of CIM/WBEM, Bluefin, to SNIA which renamed it SMI-S. Ideally, the spec will standardize communication between SAN storage devices and management applications. According to according to
1. As stated or indicated by; on the authority of: according to historians.

2. In keeping with: according to instructions.

 Sheila Childs, SNIA Board of Directors Chairperson, implementing SMI-S as a unified management standard has the potential to radically change the technology of managing computer storage:

* Storage hardware and software vendors will be able to shift resources from API development and sharing to value-added functionality.

* SMI-enabled applications will present richer interfaces to users.

* Customers will be able to achieve lower TCO (1) (Total Cost of Ownership) The cost of using a computer. It includes the cost of the hardware, software and upgrades as well as the cost of the inhouse staff and/or consultants that provide training and technical support. See ROI.  based on improved SAN interoperability and manageability.

SNIA was no stranger to CIM/WBEM. Technical Work Groups such as the DRM (1) (Digital Radio Mondiale) A digital audio broadcasting (DAB) system for AM radio in Europe. See HD Radio.

(2) (Digital Rights M
 (Disk Resource Management) and the Fibre Channel workgroups had already worked on driving management technology developments based on CIM/WBEM technologies. But in view of the storage aspect of SMI, SNIA has named SMI-S ratification as its primary objective for 2003. Its stated goal is that all member companies' new storage networking products (arrays, switches, extenders, appliances, libraries, management software, etc.) will use the SMI interface by the end of 2005. SMI-compliant products will contain native self-describing interfaces that interpret themselves into a common storage management interface. This will make storage and interoperability development faster and less expensive for vendors, and will also allow applications such as file systems and databases to directly manage storage subsystems.

SMI-S provides single object-oriented models for each type of component in a storage network. These models define common attributes and behavior for standard features and communicate themselves using a single management protocol and transport. The transport can occur over multiple interconnects. Uniform discovery, security and durable naming services are included, and SMS-S includes a lock manager so multiple management applications can safely coexist in the network. These models and protocols are platform-independent and are based on CIM/WBEM's language MOF (1) (Managed Object Format) An ASCII file that contains the formal definition of a CIM schema. See CIM.

(2) (Meta Object F
 (managed object format). MOF precisely identifies object models, which allows compilers to automatically generate data type definitions, interface stubs stubs

The shares of equity in a firm that is financed almost completely with debt. Stubs are often created when firms go through a leveraged buyout or pay big cash dividends in order to fend off a takeover.
 and GUI (Graphical User Interface) A graphics-based user interface that incorporates movable windows, icons and a mouse. The ability to resize application windows and change style and size of fonts are the significant advantages of a GUI vs. a character-based interface.  constructs and insert them into management applications. Object models are extensible.

Andrea Westerinen, VP of Technology and Distributed Management Task Force (DMTF), commented that the recent CIM 2.7 was a significant occurrence. Instead of the previous large-core device file, the definitions are broken into separate settings including data input and collection, core elements, protocol inputs, storage services, and media access devices. CIM also added a database model and networking concepts. The DMTF is working to get CIM 2.8 in preliminary release this summer.

CIM is the information model whose goal is to provide common semantics across network management tools. WBEM is the vehicle for transmitting and sharing that data. In the original release of WBEM, it was largely XML schema The definition of an XML document, which includes the XML tags and their interrelationships. Residing within the document itself, an XML schema may be used to verify the integrity of the content.  running on top of HTTP HTTP
 in full HyperText Transfer Protocol

Standard application-level protocol used for exchanging files on the World Wide Web. HTTP runs on top of the TCP/IP protocol.
. Now the DMTF is working to decouple the operations so they can run without specific HTTP programming.

CIM is modeling, WBEM is the communications piece. CIM includes overall designs for database and basic logical modeling, which is how products will report their inventory back. Oracle is running the database working group in the DMTF and have started with MIBs. As development continued, it became clear that the working groups needed to add more areas of control. Larry Krantz Krantz is the name of two persons:
  • Kermit E Krantz Physician and inventor
  • Grover Krantz Bigfoot researcher
, chairperson of SNIA's Storage Management Forum said, "What we needed to do was add more of the more specific pieces. How could we control storage?" A storage-specific offshoot of CIM followed, code-named Bluefin. Bluefin defined the profiles of how vendors could use CIM to control storage devices. The new spec proved it could work, not just for storage devices and HBAs, but beyond to switches and other storage components. The expansion needed a great deal of time, expertise and widescale buy-in, so SNIA entered the picture.

SNIA renamed Bluefin to SMI, which is not only spec development but also interoperability testing. In addition to SNIA-sponsored CIM SAN conferences and Plugfests, the Interoperability Test Program (ITP ITP - Intent to Package ), allows different vendors to test that they're interpreting SMI-S specs properly, and how interoperable they really are. The process also feeds back requirements to DMTF to help with CIM and WBEM compliance. SNIA, which addresses specific storage verticals, maintains a close working relationship with the DMTF. Krantz commented, "Think of SMI as a program to get the management interface to find, test, be interoperable, and get it out to market as fast as we possibly can."

New storage products are starting with CIM development instead of APIs. Krantz said, "API sharing will still be a major piece of it, at least in the short term. There will still be APIs, but we're going to see that decrease. I don't think it will ever go to zero, but I think it will be minimal."
COPYRIGHT 2003 West World Productions, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2003, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

 Reader Opinion




Article Details
Printer friendly Cite/link Email Feedback
Author:Chudnow, Christine Taylor
Publication:Computer Technology Review
Date:Jun 1, 2003
Previous Article:Are you ready for MAID technology? All disks spinning all the time? Not necessarily.
Next Article:AMD's Opteron aims at Itanium in 64-bit battle.

Related Articles
Report From The Chairman.
SNIA Accelerates Storage Management Interoperability With CIM-SAN-2 Developers Demonstration; CIM-SAN Program Expands With New Participants and...
Milk and honey: reaching the promised land of heterogeneous storage management. (Storage Networking).
The SNIA Advances Storage Management Initiative with Delivery of Education Programs; Introduces Formal SMI-S Developers Course and Features...
Implementing SMI-S in the real world.
Hardware beats out software for top honors.
Standards in storage networking.
New SNIA Client Conformance Testing Program Validates SMI-S Management Applications.
Getting more intelligent about storage management.

Terms of use | Copyright © 2014 Farlex, Inc. | Feedback | For webmasters