Transcript IBM Presentations: Smart Planet Template

Presenter’s Name
Presenter’s Title
Smoothing the DB2
version migration
path!
Migrating to DB2 v10?
Do you want to avoid surprises and delays
during and after the upgrade process?
DB2 subsystem clones offer multiple levels of testing
environments
These clones can be created with minimum skilled
resources, minimum time and no interruption to your
production systems.
Creating exact copies of production quickly for high
quality testing reduces the risk of impacting critical
applications during the migration process.
2
Agenda
What is lurking in production? (and other
environments)
Problems and concerns
Test environments needed for success
Smoothing the migration path
Test environments created by VCR
Database storage integration
Cloning overview
Cloning terminology
Clone DB2 systems
Step by Step test environment creation
3
What’s lurking in production?
You are migrating to
a new version of DB2!
4
4
What’s lurking in production?
But, what is lurking in
your production
environment?
5
5
What’s lurking in production?
What is waiting to be
uncovered by the
new software?
6
6
What’s lurking in production?
Your environment is unique –
 How do those new features really work in YOUR production environment?
 How do those WAD elements mesh with YOUR production environment?
 Are there bugs that can only surface in YOUR production environment?
 Are there issues that can only manifest with the combinations of data and data volumes in YOUR
production environment?
What are the unexpected events for which you cannot test because they cannot
be ANTICIPATED with your current knowledge?
 Is there legacy code using undocumented features that no longer exist?
 Is there Assembler code using addresses that are now used by DB2?
 Is there a clever SQL technique that no longer works?
 Is there code that was never invoked because the data volumes never
reached the levels and throughput possible with the new DB2?
 Something else?
7
7
What’s lurking in development?
 Development environments
 Critical applications may be in test – with new
features – DB2 VNEXT may impact
 Performance testing can be impacted by new
versions of DB2
 Optimizer changes, etc
 Multiple copies of the same application
objects and data – Make more complicated
environment to manage
 Multiple versions of the same application
 New features of an application that have not
quite made it into production
8
8
What’s lurking in production?
How do you find out before it
bites you?
 Upgrading to a new DB2 version is a high impact effort.
 Any issue could be visible system wide or company wide
 Sandbox environments are used to initially test DB2 version
release. However, software is rarely kept in sync with
production.
 This is due to resources issues of time, money, space, manpower,
and availability of required skills.
 Usually “bare bones” and not reflecting production
 There is only one Sandbox but many production DB2
configurations.
 It is difficult to measure the impact or savings of implementing
new DB2 features without testing in a production-like
environment.
9
9
What’s lurking in production?
A clone of your
production DB2 can
uncover what’s
hidden!
10
10
Smoothing the migration path
Cloning DB2 is not a new concept
 There are 2 basic traditional methods
 The first method – Resource intensive:
 Creates a new DB2 system (the clone)
 Creates the objects from a source DB2 on the new DB2 via DDL
 Unloads the tables of the source DB2
 Loads the table rows of the source DB2 onto the tables of the clone
 The second method – Requires an isolated LPAR:
 Dump the data sets of a source DB2 to tape or some movable media
 On an isolated LPAR restore the data sets of the source DB2
 Start the clone DB2
 A third and non-traditional method uses cloning automation and makes the process  Safer
 Faster
 Non resource intensive
 Can clone on the same or on a shared LPAR
 Uses storage technology which you already own
11
11
Smoothing the migration path
Migration with a DB2 subsystem clone
 Create the DB2 subsystem Clone. There is cloning automation which can do this in
under an hour
 Migrate the clone to the new version of DB2
 Execute a parallel set of production jobs on the Clone
 If any issues are uncovered, correct them at leisure during business hours, with no
fear of an emergency back off at some early morning hour
 Apply any necessary patches and migrate the production DB2 with confidence!
12
12
How does it clone so fast?
Database and Storage Integration
Application and
Database Management
Domain
Mainframe
Database
Systems
• Organizational Integration
• New Backup Methods
• New Recovery Strategies
• Business Recovery Monitoring
• Cloning Automation
• Disaster Restart Solutions
Storage Aware
Database Tools
Storage Administration
and
Business Continuity
Domain
Source
Database
Backup,
Clone,
DR
13
13
Cloning Terminology
 A clone is an exact but independent replica
 Clone a DB2 system by volume
 Clone a table space by data set
 DB2 system cloning and table space refresh

The act of replicating the data, making the replica accessible, and then using the replica in lieu of
the original data
 DB2 system cloning automation
 Clones a complete DB2 system including all its databases
 Lowest level is by storage volume
 DB2 table and index space refresh automation
 Refreshes specific table and index spaces
 Lowest level is by data set
14
14
Types of DB2 clones
 Full Subsystem Clone
 2 sources:
 DB2 Subsystem storage volumes
 System Level Backup (SLB)
 Partial subsystem Clone
 Selected storage volumes (partial application data)
 Skeleton Clone
 DB2 directory, catalog, BSDS, and active logs storage
volumes without application data
 Populated by dataset
 Table Space Clones
 By dataset/object definition
15
15
Fast Replication Data Copy
Options
Fast copy processes offloaded to the storage processor
No host CPU or I/O resources
 Volume based fast replication options for DB2
system cloning
 FlashCopy (IBM,EMC,HDS)
Fast Replication
Commands from
z/OS
 SnapShot (IBM,STK)
 TimeFinder/Clone Volume Snap (EMC)
 TimeFinder/Snap (EMC)
 Mirror processes
PPRC (IBM,EMC,HDS)
TimeFinder/Mirror, SRDF (EMC)
ShadowImage HUR (HDS)
 Data set based fast replication options for DB2
table space refresh
 Data Set FlashCopy (IBM,EMC,HDS)
 Data set SnapShot (IBM,STK)
 TimeFinder/Clone Data set Snap (EMC)
16
16
Host Based Data Copy
Options
Data copy processes use host based CPU and I/O facilities
Slower than storage-based fast replication
Host-based
Copy Process
 Volume copy options for DB2 system cloning
 TDMF (IBM)
 FDRPAS (Innovation Data Processing)
 DFSMSdss (IBM)
 FDR (Innovation Data Processing)
 Data set copy options for DB2 table space refresh
 Any traditional data set copy processes
17
17
DB2 Full Subsystem Cloning Steps
Target DB2
Production DB2
‘Source’
5
Rename
6
Update DB2 directory and BSDSs
DB2 volume
Selection or
SLB
A. SET LOG LOAD(0)
SET LOG SUSPEND
7
Start DB2 in maintenance mode for
metadata management
8
Correct DB2 catalog and directory
page spaces
(*not for an SLB source)
9
Update DB2 catalog
DB2
1
2
DB2
Clone
B. Consistency
Group
10 Correct application page spaces
3 Volume copy
4 SET LOG
RESUME if 2A
Source
Database
Volumes
Clone
Database
Volumes
11
Stop target in maintenance mode
12 Start DB2 clone in normal mode
18
18
Partial Subsystem Clone
Application Volumes
Application Volumes
Application Volumes
Source
DB2 Subsystem
Volumes
Application Volumes
Clone
DB2 Subsystem
Volumes
 DB2 subsystem is cloned + specific applications
 Some application datasets are excluded from
renames – and optionally deleted
19
Populated Subsystem Skeleton
Clone
Application Volumes
Application Data Sets
Application Data Sets
Application Volumes
Source
DB2 Subsystem
Volumes
Clone
DB2 Subsystem
Volumes
 DB2 subsystem is cloned + selected DB2
data sets
 Volumes containing application data are
NOT copied
20
DB2 Table Refresh Steps
Target DB2
Production DB2
‘Source’
Source Job
DB2
DB2
Target Job
Target
1
2
Verify object compatibility
7
Object ID translation,
data masking and log
apply
Create target DB2 DDL and
table and index spaces if
they don’t exist
8
Update identity columns
4
Stop table space or
fuzzy copy
9
Start target table and
index spaces
5
Perform copy process
6
Start, if stopped
3
21
LISTDEF selection
21
Benefits of cloning
 All source object are known to the clone
 Triggers
 Constraints, Etc.
 Stats are identical to the source
 Packages are already bound and access paths known
 Columns may be masked to protect sensitive data
 If it can be done on the source it can be done on the
clone
 The footprint of the clone can be determined by the
user and how the clone is populated
22
22
DB2 Support
 DB2 Support
 DB2 offline
 DB2 online
 Clone from an executing DB2 subsystem
 Clone from a System Level Backup
 DB2 data sharing
 DB2 data sharing with many to less members
 DB2 data sharing to non-DB2 data sharing
 Clone from a System Level Backup
23
23
Using Volume Clone and
Rename (VCR) & Fast
Tablespace Refresh(FTR)
Smooths the migration path – and helps YOU to
avoid surprises and delays during and after the
upgrade process
 Provides for creating DB2 subsystem clones, which offer
multiple levels of testing environments
 Clones are created with minimum skilled resources,
minimum time and no interruption to your production
systems.
 Creating clones of your production and nonproduction
environments reduces the risk of impacting critical
applications during the migration process.
24
24
Q&A
25
25