DS8700 Easy Tier

Вышел новый RedPaper посвящённый  самым мощным системам хранения данных – DS8700

IBM System Storage DS8700 Easy Tier

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This IBM® Redpaper™ publication describes the concepts and functions of IBM System Storage® Easy Tier and explains its practical usage with the DS8700.

The IBM System Storage Easy Tier feature and its accompanying Storage Tier Advisor Tool are available for the IBM System Storage DS8700 with Licensed Machine Code (LMC) level 6.5.1.xx.

IBM System Storage Easy Tier is designed to help automate data placement throughout the DS8700 disks pool. This includes the ability for the system, automatically and without disruption to applications, to relocate data (at the extent level) across drive tiers (hard disk drives and solid state drives). The process is fully automated.

Easy Tier supports a Manual Mode that enables the user to relocate full volumes. The Manual Mode also offers the ability to merge extent pools and to restripe volumes within an extent pool.

The paper is aimed at those who want to get an understanding of the Easy Tier concept and its underlying design. The paper also provides guidance and practical illustrations for users who want to exploit the Easy Tier Manual Mode capabilities.


Chapter 1. Easy Tier overview
1.1 Introduction
1.2 Capabilities

Chapter 2. DS8700 storage virtualization
2.1 The abstraction layers for disk virtualization
2.1.1 Array site
2.1.2 Array
2.1.3 Ranks
2.1.4 Extent pools
2.1.5 Logical volumes
2.1.6 Space efficient volumes
2.1.7 Allocation, deletion, and modification of LUNs or CKD volumes
2.2 Summary of the virtualization hierarchy

Chapter 3. Easy Tier concept, design, and implementation
3.1 General I/O characteristics
3.2 Easy Tier concept
3.3 Easy Tier operating modes
3.3.1 Easy Tier Manual Mode
3.3.2 Easy Tier Automatic Mode
3.4 Easy Tier design
3.4.1 Performance metrics for Easy Tier Automatic Mode
3.4.2 Migration plan creation
3.5 Easy Tier implementation

Chapter 4. Planning for Easy Tier
4.1 Prerequisites
4.2 SSD configuration planning
4.3 Extent pool planning
4.4 Additional considerations for new configurations
4.4.1 SSDs on dedicated DA pairs
4.4.2 Mixed back-end DDM technology in DA pair
4.4.3 Example back-end configuration
4.4.4 Logical configuration
4.5 Copy Services considerations
4.6 Workload planning
4.7 Planning tools
4.7.1 Storage Tier Advisor Tool
4.7.2 Disk Magic

Chapter 5. DS GUI and DS CLI support for Easy Tier
5.1 DS GUI and DS CLI support for Easy Tier
5.2 DS Storage Manager GUI changes
5.2.1 Volume migration panels
5.2.2 Volume Properties panel
5.2.3 Disk Configuration and Extent Pool main panels
5.2.4 Extent Pool Properties panel
5.2.5 Manage Volumes panel
5.2.6 Merge Extent Pools panel
5.2.7 Easy Tier controls in Storage Image properties panel
5.3 Easy Tier functions with DS GUI
5.3.1 Dynamic extent pool merge
5.3.2 Dynamic volume relocation
5.3.3 Easy Tier Automatic Mode
5.3.4 Exporting the Easy Tier summary report
5.4 DS CLI changes
5.5 Easy Tier functions with DS CLI
5.5.1 Dynamic volume relocation
5.5.2 Dynamic extent pool merge
5.5.3 Easy Tier Automatic Mode
5.5.4 Downloading monitor data

Chapter 6. Using Easy Tier
6.1 Easy Tier usage
6.2 Receiving and installing the advisor tool software
6.3 Collect data within the DS8700
6.4 Off loading collected data
6.5 Processing the uploaded data through the advisor tool
6.5.1 Invoking the storage advisor tool
6.5.2 Storage advisor output files
6.6 Interpreting the storage advisor output
6.6.1 Heat map summary data examples
6.6.2 DS8700 based reports without SSD installed
6.6.3 DS8700 with hybrid pools
6.7 Using Easy Tier in Manual Mode
6.7.1 Consolidating extent pools
6.7.2 Restriping volumes in a consolidated extent pool
6.7.3 Removing a rank from an extent pool
6.7.4 Removing volume extents from SSD rank without changing rank status


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