How Thin Image works

Thin Image User Guide

Version: 9.8.6
Audience: anonymous
Part Number: MK-98RD9020-16

Overview of Thin Image
About Thin Image
Workflow for storing Thin Image snapshot data
Components of Thin Image
Thin Image pairs
Volume components
Snapshot tree components
DP-VOLs that can be used for Thin Image pairs
Maximum number of Thin Image pairs
Consistency and snapshot groups
Snapshot trees
Creating cascaded pairs
Volume differences between Thin Image and ShadowImage
Software applications for Thin Image
How Thin Image works
How Thin Image uses pools and pool volumes
Usage level rebalancing among parity groups
How Thin Image uses V-VOLs
How Thin Image pairs are created
Using snapshot pairs (not cascaded)
Using cascaded pairs
Workflow for creating groups and storing snapshot data using CCI
Methods of storing snapshot data
Thin Image pair restoration
How Thin Image pair status changes
Thin Image host access and pair status
Workflow for Thin Image pair status changes
Copy threshold option and host server I/O performance for Thin Image (SOM 467)
Copy threshold option for capacity saving
Sharing Thin Image volumes with other software applications
Sharing Thin Image volumes that have Data Retention Utility access attributes
Sharing Thin Image volumes with Hitachi Volume Migration
Sharing Thin Image volumes with ShadowImage
Sharing Thin Image volumes with TrueCopy and Universal Replicator
Volume backup with Thin Image, TrueCopy, and Universal Replicator in a 3DC multitarget configuration workflow
Volume backup with Thin Image and Universal Replicator in a 3DC multitarget configuration workflow
Volume backup with Thin Image and Universal Replicator in a 3DC cascade configuration workflow
Sharing Thin Image volumes with global-active device
Storage system configuration with Thin Image and GAD
Consistency group configuration with Thin Image and GAD
Snapshot group configuration with Thin Image and GAD
Sharing Thin Image volumes with Dynamic Provisioning and Dynamic Provisioning for Mainframe in a single storage system
Sharing Thin Image volumes with Resource Partition Manager
Thin Image system and planning requirements
Thin Image system requirements
Thin Image licensed capacity requirements
Thin Image shared memory requirements
Thin Image volume requirements
Thin Image data pool requirements
Thin Image consistency group requirements
Thin Image snapshot group requirements
Thin Image planning requirements
Calculating the number of Thin Image pairs based on pair tables
Calculating Thin Image pairs based on the snapshot estimated manageable capacity
Calculating Thin Image pairs based on cache management devices
Calculating the number of cache management devices
Calculating the Thin Image pair capacity for DP pools
Thin Image cache management device requirements
Calculating and assigning pool capacity
Resolving insufficient pool capacity
Pool capacity calculations
Creating a backup of data
Universal Volume Manager and external volumes used as pool-VOLs
Simultaneous processing of multiple Thin Image pair tasks
Pair operations when pairs are cascaded
Pair operations when pairs are not cascaded
Pair operations when the root volume is shared by multiple pairs
Pair operations when a node volume is shared by multiple pairs
Data backup and recovery differences between ShadowImage and Thin Image
Removing Thin Image
Configuring Thin Image
Prerequisites for configuring Thin Image
Workflow for configuring Thin Image
Creating Thin Image data pools
Selecting pool volumes
Pool creation and data drive type priority
Workflow for registering virtual volumes
Editing the SSID for virtual volumes
Changing V-VOL settings
Creating V-VOLs for Thin Image S-VOLs
Removing LDEVs from registering tasks
Recognizing devices from the host server
Host server stoppages and device recognition issues
Using an existing V-VOL as an S-VOL in a clone pair
Changing local replica options that affect Thin Image performance
Workflow for creating and managing Thin Image pairs
Overview of using CCI to run commands through in-band connections
Deleting LU paths or namespaces set for Thin Image paired volumes
Managing Thin Image Pairs
Workflow for creating and managing Thin Image pairs
Workflow for creating Thin Image pairs using Device Manager - Storage Navigator
Creating Thin Image pairs using Device Manager - Storage Navigator
Selecting a pool as your primary volume
Example of creating complex Thin Image pairs
Reloading Thin Image configuration information
Pair operations for each consistency group
Adding Thin Image pairs to snapshot or consistency groups using CCI
Workflow for defining Thin Image pairs and defining them in snapshot or consistency groups using Device Manager - Storage Navigator
Storing snapshot data or cloning pairs
Splitting Thin Image pairs to store snapshot data
Splitting Thin Image pairs to store snapshot data using CCI
Workflow for storing snapshot data or clone pairs in consistency groups
Using consistency group pair-split with shared volumes
Restoring Thin Image pairs
Failure during Thin Image pair restore
Restoring suspended Thin Image pairs
Thin Image pair resynchronization
Pair resynchronization methods
Resynchronizing Thin Image pairs
Assigning MU numbers to deleted snapshot data
Deleting snapshot data
Deleting Thin Image pairs
Accelerating the Thin Image pair deletion process
Removing Thin Image snapshot groups
Defragmenting a snapshot data area
Defragmenting using CCI
Reviewing defrag processing behaviors
Assigning secondary volumes to Thin Image pair snapshot data
Assigning secondary volumes to snapshot data after creating new Thin Image pairs
Assigning secondary volumes to snapshot data of existing Thin Image pairs
Releasing assignment of secondary volumes from Thin Image pair snapshot data
Changing assignment of secondary volumes to Thin Image pair snapshot data
Monitoring and maintaining Thin Image
Monitoring pair information
Viewing summary replication information
Viewing local replication summary information
Viewing the number of pairs
Viewing the list of primary volumes
Viewing pair properties
Thin Image pair status definitions
Viewing pair synchronization rates
Monitoring consistency groups
Viewing the number of consistency groups
Viewing the list of consistency groups
Viewing consistency group properties
Viewing Thin Image pair task history
Thin Image task code definitions
Viewing licensed capacities
Viewing the number of cache management devices
Managing pools
Monitoring pool information
Viewing used pool capacity
Viewing used capacity by pool
Viewing the used capacity of the physical capacity by pool
Viewing used pool capacity by Thin Image pair's root volume
Viewing formatted pool capacity and pool usage rates
Increasing pool capacity
Failure of available pool capacity formatting and pool capacity increase
Decreasing pool capacity
Stopping the process of decreasing pool capacity
Editing the data pool warning threshold
Editing pool names
Workflow for recovering blocked pools
Recovering blocked pools
Workflow for decreasing pool capacity
Deleting pools
Managing virtual volumes
Editing virtual volume names
Workflow for deleting V-VOLs specified for Thin Image S-VOLs
Deleting virtual volumes
Expanding the DP-VOL capacity while keeping the pair status
Expanding DP-VOL capacity used in a Thin Image pair
Expanding DP-VOL capacity when a Thin Image pair shares the same volume with other software
Troubleshooting the expansion of DP-VOL capacity
Viewing snapshot data capacity
Maintaining pairs during storage system maintenance
Switching off the power supply
Power supply and existing shared memory
Power supply and losing data in shared memory
Using storage system functionality with a VASA provider
Definition of failure
Troubleshooting Thin Image
Overview
Failures in a cascaded configuration
Troubleshooting the source of SIM codes
Troubleshooting pools, pairs, and volumes related to Thin Image
Workflow for correcting pool-related failures (SIM = 602xxx, 604xxx, 605xxx, and 606xxx)
Workflow to perform when SIMs related to the pool usage rate were reported
Workflow to perform when SIMs related to the pool capacity or the capacity ensured for writing were reported
Workflow for fixing errors when SIMs related to cache management devices are reported
Calculating the number of remaining cache management devices
Workflow for fixing errors when SIMs are reported
Completing SIMs
Manually completing SIMs
CCI command reference for Thin Image
Pair tasks using CCI or Device Manager - Storage Navigator
CCI pair command results
Parameter ranges for CCI options
Troubleshooting with Command Control Interface
Command Control Interface SSB2 codes
Notes on using Thin Image primary volumes as TrueCopy, ShadowImage, or Universal Replicator pair volumes
Notes on storing snapshot data
Thin Image GUI windows and wizards
Replication window
Local Replication window
View Pair Synchronization Rate window
View Pair Properties window
History window
Consistency Group Properties window
Create TI Pairs wizard
Create TI Pairs window
Assign Secondary Volumes window
Create TI Pairs confirmation window
Select Pool window
Split Pairs wizard
Split Pairs window
Split Pairs confirmation window
Resync Pairs wizard
Resync Pairs window
Resync Pairs confirmation window
Delete Pairs window
Edit Local Replica Options wizard
Edit Local Replica Options window
Information to know before setting wait time
Edit Local Replica Options confirmation window
TI Pairs window
Assign Secondary Volumes wizard
Assign Secondary Volumes window
Assign Secondary Volumes confirmation window
Remove Secondary Volumes window

This topic explains how the Thin Image snapshot product works.

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