IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 52

Administrator “When you deploy these types of smart technologies, you can improve the life for the entire DRAM/flash drive to three to five years.” —Clod Barrera, chief technical strategist, IBM System Storage To address these and other issues, storage engineers are tinkering with hybrid flash/DRAM and smart software-based storage configurations to reduce and possibly eliminate writes. One of these methods is called “write elimination.” This involves using DRAM as a front-end cache to which writes are directed. In this scenario, only the last write would be applied to an SSD cell, with proceeding writes being overwritten on DRAM instead of the SSD, thereby avoiding multiple cell zaps. Another method involves over provisioning back-end flash. In this case, it appears as if there may be 300 GB of flash when in fact there are 500 or 600 GB of flash. As cells die off, the written data is moved to healthy cells, beyond the 300 GB of flash that were originally provisioned. This essentially extends the life of the entire flash module. A third way to address dead and dying f lash cells is by employing wear leveling. If, for example, one cell is being written to more than other cells, the data on that overused cell can be moved to under-used cells. Wear leveling, as with the second method, employs over provisioning, but with smart data movement, with writes being shared across the flash memory. According to Barrera, these technologies can extend the life of SSDs, up to the typical life span of HDDs. “When you deploy these types of smart technologies, you can improve the life for the entire DRAM/flash drive to three to five years, which is perfectly adequate. Because SSDs are capable of many more operations per second than HDDs, fewer are needed.” announce SSDs for its midrange disk systems. However, it’s clear that simply replacing SSDs in disk arrays has its limits and other solution elements—such as controllers, channels, buffering, access protocols and management software–need to be adjusted to truly deliver the value of these faster devices. To that end, IBM is developing new e n ha nce me nt s w it h i n it s se r ve r plat for m s , d at aba se platforms and management software to enable clients to take full advantage of SSD performance throughout the application stack. One example is the development around System z*, where Data Facility Storage Management Subsystem policy-based storage management allows clients to control which new datasets get allocated on traditional disk and which on SSD. To help w it h t h is, en ha nced System Mon itor i ng Facilit y (SM F) records that contain the detailed dataaccess statistics histor y can be used to identify datasets that will benefit most from SSD placement, and IBM also makes complementar y data-migration tools available to move data to the appropriate drive tier. What’s more, a new synergy function between the System z platform and the IBM System Storage DS8000 called High Performance FICON for System z can improve SSD performance in the DS8000 even further by exploiting a new channel protocol, especially designed for more efficient I/O operations. Everything Automated Most enterprises won’t go solely with SSDs in part because of the higher price compared to HDDs. For companies requiring the capability to handle many high-volume transactions, a mix of SSDs and HDDs may be the right choice. Both can be deployed in disk arrays and storage-area networks (SANs) and managed by the same storage-control software, such as the IBM SAN Volume Controller. “Everything has to be part of an automated, high-availability, high-integrity, auditable mechanism for data-storage management. Customers have to be able to do backups, provisioning and associate storage with the correct applications,” Barrera notes. IBM announced SSDs for its f lagship disk system, the IBM System Storage DS8000*, in early 2009, and will soon 52 SEPTEMBER/OCTOBER 2009 The Future Whatever the case, SSDs will become part of many enterprise storage infrastructures, particularly as they pertain to highvolume, small-data environments. This is despite the likelihood that SSD price points per GB are unlikely to reach those of HDDs in the near future. Although the notion of SSDs isn’t new, ongoing and future research into this type of storage—or memory, depending on how one looks at it—is going to make the technology an integral part of most typical enterprise data centers. Note: Allen Marin of IBM System Storage contributed to this article. Jim Utsler, I BM Systems Magazine senior writer, has been covering technology for more than a decade. Jim can be reached at jutsler@ msptechmedia.com. ibmsystemsmag.com/mainframe

IBM Systems Magazine, Mainframe digital edition - September/October 2009

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe digital edition - September/October 2009

IBM Systems Magazine, Mainframe digital edition - September/October 2009
Table of Contents
Editor's Desk: IBM Makes it Easy to be Green
Focus on Storage: System z, DS8000 and Tivoli Provide a Complete Encryption Package
Trends: CICS Transaction Server 4.1 Helps Organizations, Compete, Comply and Control
Case Study: Transzap Consolidates its Oracle Databases in a Virtualized Linux on Mainframe Environment
Cover Story: IBM Poughkeepsie Green Data Center Showcases a Dynamic Infrastructure
Feature: IBM Study Reveals the System z10 Provides a Cheaper, Easier-to-Manage Cloud Solution
Feature: Women in IT Team Up to Succeed
Developer: Process XML Documents Within COBOL and DB2
SSDs Are Integral to Enterprise Storage Infrastructures
Product News
Advertiser Index
Stop Run: Gordon Bruce Talks His Way Into a High-Profile IT Gig
Reference Point
2010 Mainframe Buyer's Guide
COMPANY SHOWCASES: Learn more about some of the companies that develop and sell products for the mainframe
PRODUCT + SERVICE LAUNCHES: Get in-depth descriptions of some products in the guide
SUCCESS STORIES: These real-world examples show how mainframe business partners bring real value to companies
USING THE PRODUCT + SERVICE DIRECTORY: How to navigate the listings
Product + Service Directory: Hardware Listings
Product + Service Directory: Software Listings
Product + Service Directory: Services Listings
Product + Service Directory: Education Listings
INDEXES
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Intro
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - IBM Systems Magazine, Mainframe digital edition - September/October 2009
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Cover2
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 1
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Table of Contents
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 3
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 4
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 5
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 6
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 7
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Editor's Desk: IBM Makes it Easy to be Green
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 9
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Focus on Storage: System z, DS8000 and Tivoli Provide a Complete Encryption Package
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 11
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 12
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 13
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 14
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 15
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Trends: CICS Transaction Server 4.1 Helps Organizations, Compete, Comply and Control
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 17
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 18
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 19
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 20
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 21
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Case Study: Transzap Consolidates its Oracle Databases in a Virtualized Linux on Mainframe Environment
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 23
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 24
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 25
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 26
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 27
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Cover Story: IBM Poughkeepsie Green Data Center Showcases a Dynamic Infrastructure
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 29
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 30
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 31
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 32
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 33
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 34
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 35
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Feature: IBM Study Reveals the System z10 Provides a Cheaper, Easier-to-Manage Cloud Solution
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 37
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 38
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 39
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 40
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 41
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Feature: Women in IT Team Up to Succeed
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 43
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 44
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BRC1
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BRC2
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 45
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Developer: Process XML Documents Within COBOL and DB2
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 47
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 48
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 49
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - SSDs Are Integral to Enterprise Storage Infrastructures
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 51
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 52
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 53
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Product News
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Advertiser Index
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Stop Run: Gordon Bruce Talks His Way Into a High-Profile IT Gig
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Cover3
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Cover4
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Reference Point
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - RF2
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - 2010 Mainframe Buyer's Guide
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BGCover2
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG1
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG2
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG3
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG4
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG5
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - COMPANY SHOWCASES: Learn more about some of the companies that develop and sell products for the mainframe
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG7
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG8
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG9
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG10
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG11
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG12
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG13
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - PRODUCT + SERVICE LAUNCHES: Get in-depth descriptions of some products in the guide
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG15
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - SUCCESS STORIES: These real-world examples show how mainframe business partners bring real value to companies
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG17
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG18
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - USING THE PRODUCT + SERVICE DIRECTORY: How to navigate the listings
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Product + Service Directory: Hardware Listings
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG21
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Product + Service Directory: Software Listings
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG23
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG24
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG25
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG26
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG27
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG28
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG29
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG30
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG31
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG32
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG33
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG34
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG35
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG36
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BG37
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Product + Service Directory: Services Listings
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - Product + Service Directory: Education Listings
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - INDEXES
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BGCover3
IBM Systems Magazine, Mainframe digital edition - September/October 2009 - BGCover4
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