Click to edit Master title style MIGRATE

Report
Recovery Management Solution
50 Ways to Move Your Data
(a.k.a., Make a New Plan Stan)
Phil Grainger
Donna Di Carlo
BMC Software
Session Code: 414
Wed, May 01, 2013 01:00 PM - 02:00 PM| Platform: DB2 for z/OS
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Agenda
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Data migration overview
Capturing a consistent image
Migrating with RMD Solution V10.1.00
New V11.1.00 Copy Migration feature
Migration scenarios
Summary
Questions
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Why do we move data around?
• Production data is our business
• And it is often handy to have that data elsewhere
• From production DB2 to “somewhere else”
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Data analytics and decision support
Application testing
System testing
Problem diagnostics
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What are our choices?
• As with most things in DB2, we have choices to make
• We could use Unload and Load
• Costly process and time consuming
• We could use DSN1COPY
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Much faster
But no knowledge of DB2 internals
DSN1COPY can complete without errors, but the data may still be inaccessible
There are more and more reasons NOT to use DSN1COPY:
• Schema changes that are not yet instantiated
• RRF vs BRF
• Object definition differences
• We could use hardware snapshots
• IF the object structures are IDENTICAL between subsystems
• For safety we would need to revert to Unload and Load
• Costly process and time consuming
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There has to be a better way
• And there is
• Restore the data using a consistent image
• This process is very efficient
• And if the data movement needs to be repeated, we could
• Refresh the migrated data
• Or even propagate changes via log
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Consistent image copy
• Image copy can’t have in-flight transactions
• All updates must be committed
UR 4
UR 1
UR 3
UR 2
Consistent
Point
Inconsistent
Point
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Obtaining a consistent image
• SHRLEVEL REFERENCE image copy
• Requires a large outage
• Instant Snapshot Copy
• Uses intelligent storage to snap a SHRLEVEL REFERENCE copy
• Requires a small outage
• OUTCOPY ONLY
• Merges existing image copy with log to produce a copy
• Must specify a quiet point or use Timestamp Recovery feature
• Can use Log Master to find a quiet point
• QUIESCE not necessary
• Online Consistent Copy (OCC)
• Creates a SHRLEVEL CHANGE Snapshot
• Uses log to back out in-flight transactions
• No outage required
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Recover Plus INCOPY feature
• Use when the target subsystem is remote
• Specify an unregistered consistent copy in the INCOPY clause
• Supply OBID translation values
• Values can be defaulted for single-table table spaces and indexes
DB2A
DB2B
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Recover Plus INCOPY feature (cont.)
• Recover Plus INCOPY feature (cont.)
• Difficult to use with OBJECTSET
• An OBJECTSET allows you to process a group of objects in a single
statement
• All OBID translation values must be defaulted
• All image copy data set names must use the same data set model
• Can’t use cabinet copies
• A cabinet copy contains several small images in one data set
• Eliminates several data set allocate/open/close commands
• Needs BMCXCOPY information to read the cabinet
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Recover Plus INDEP OUTSPACE
• Use when shared DASD is available
• Specify source object name and quiet point
• The appropriate image copy will be used based on the quiet point
• Will merge log with image copy to create a consistent image
• Can use Timestamp Recovery and specify a time instead of a quiet point
• Specify VSAM data set name of target
• Supply OBID translation values
• Defaults source values for single-table table spaces and indexes
DB2A
DB2A
Log
DB2B
VSAM DS
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Recover Plus INDEP OUTSPACE (cont.)
• Can’t be used with cabinet copies or an OBJECTSET that
contains multi-table table spaces
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V11.1.00 Copy Migration feature
• Copy Migration feature helps automate migration
• The migration file is key
• Supplies image copy names and translation ID values
• Used to verify compatibility between source and target attributes
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V11.1.00 Copy Migration feature (cont.)
• Uses the following products
• Copy Plus
• EXPORT creates the migration file
• Recover Plus processes the migration file
• IMPORT automates INCOPY
• MIGRATE automates INDEP OUTSPACE
• Change Manager
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EXPORT
IMPORT
Allows for multi-tasking
Allows BMCXCOPY access
• Instant Snapshot
• Cabinet copies
• Encrypted copies
• Allows LOB migration
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Migration file
• Brains of Copy Migration
• Contains information from SYSCOPY,
BMCXCOPY and the DB2 catalog
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Image copy names
Object ID values
Schema definitions
Versioning information
• Allows for a high level of error checking
• Created by the Copy Plus EXPORT
command
• Input to the Recover Plus IMPORT and
MIGRATE commands
BMCXCOPY
SYSCOPY
DB2 Catalog
Migration
File
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Copy Plus EXPORT command
• The output descriptor defines the migration file allocation
• The object list names the table spaces to be exported
• TABLESPACE
• Can be wildcarded
• OBJECTSET
• APPLICATION
• Table spaces will be included if a full image copy is found
• Can request to include indexes with INDEXES YES
• Must have an available index image copy
• Image copy selection
• Most recent copy is default
• If INDEXES YES, index copy log point doesn’t have to match table space copy
• Can request a copy at a specific point
• If INDEXES YES, index copy log point must match table space copy
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Copy Plus EXPORT example
OUTPUT EXPFILE UNIT WORK EXPOUT YES
DSNAME RDADMB.PBGMIG.EXPORT
EXPORT TABLESPACE DMDSRC*.*
EXPORTDDN(EXPFILE)
ATLOGPOINT LASTFULLCOPY
INDEXES YES
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Recover Plus IMPORT command
• Automates the INCOPY technology
• The EXPORT runs on the source while the IMPORT runs on the target
• The object list names the table spaces to be imported
• TABLESPACE
• OBJECTSET
• No specification means import everything
• You have a choice on how to handle indexes
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REBUILD
RECOVER
AUTO - let Recover Plus decide
NO - don’t process any indexes
• Command available to map object names from source to target
• Ability to migrate only data that has changed since last
EXPORT/IMPORT
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IMPORT
TS
BMC
XCOPY
COPY
IC
IX
TS
BMC
XCOPY
IMPORT
SYSCOPY
IX
MIG
FILE
DB2
CATALOG
EXPORT
DB2
CATALOG
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Recover Plus IMPORT example
IMPORT USING RDADMB.PBGMIG.EXPORT
NOCOPYPEND
INDEXES AUTO
SYNC AUTO
CHANGE TABLE
FROM RDADMB.DMDSRC* TO RDADMB.DMDTGT*
CHANGE INDEX
FROM RDADMB.DMDSRC* TO RDADMB.DMDTGT*
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Recover Plus MIGRATE command
• Automates the INDEP OUTSPACE technology
• The EXPORT runs on the target while the MIGRATE runs on the
source
• The object list names the table spaces to be exported
• TABLESPACE
• OBJECTSET
• No specification means migrate everything
• Choices to handle indexes are limited
• Recovering the indexes is advisable
• Cannot rebuild the indexes with MIGRATE
• Must supply a model of the VSAM data set name
• Command available to map object names from source to target
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MIGRATE
DB2
CATALOG
DB2
Catalog
TS
IC
EXPORT
MIGRATE
IX
Log
MIG
FILE
SYSCOPY
BMC
XCOPY
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Recover Plus MIGRATE example
MIGRATE USING RDADMB.PBGMIG.EXPORT1
CHANGE TABLE
FROM RDADMB.DMDTGT* TO RDADMB.DMDSRC*
CHANGE INDEX
FROM RDADMB.DMDTGT* TO RDADMB.DMDSRC*
INDEP OUTSPACE
MODEL &VCAT.DSNDBC.&DB.&TS.I0001.&PART
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Migration scenarios
• BACKOUT updates
• Log Master ongoing process
• Copy Migration refresh
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BACKOUT updates
• IMPORT production to test
• On the source subsystem
• Create an OCC for the table spaces
• Execute Copy Plus EXPORT to create a migration file
• On the target subsystem
• Use Change Manager to
• Create the target objects
• Specify IMPORT to migrate the data
• Rebuild the indexes
• Execute Copy Plus to create copies of the new table spaces
• Perform testing
• BACKOUT AUTO to refresh data
• Forward recovery will be performed if one of the following occurs
• REORG
• LOAD
• REBUILD
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Log Master ongoing process
• MIGRATE production to RO subsystem
• On the target subsystem
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Use Change Manager to create the target objects
Create an image copy for the table spaces
Execute Copy Plus EXPORT to create a migration file
Stop the table spaces
• On the source subsystem
• Find and generate a quiet point with Log Master
• Run Recover Plus MIGRATE to move the data to the target VSAM
• On the target subsystem
• Start the table spaces
• Rebuild the indexes
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Log Master ongoing process (cont.)
• Refresh from production
• On the source subsystem
• Collect Logical Log (LLOG) with Log Master ongoing process
• Use the quiet point from the MIGRATE as a starting point
• Specify end point with a date/time, LRSN or LOGMARK
• On the target
• Use High Speed Apply Engine to apply LLOG
• Repeat this process on a regular basis
• Some customers repeat as regularly as every 15 minutes
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Copy Migration refresh
• IMPORT production to test
• On the source subsystem
• Create an OCC for the table spaces and indexes
• Execute Copy Plus EXPORT to create a migration file
• On the target subsystem
• Use Change Manager to
• Create the target objects
• Use Recover Plus to
• IMPORT the table space and indexes
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Copy Migration refresh (cont.)
• Refresh test data
• On the source subsystem
• Create an OCC for the table spaces and indexes
• Execute Copy Plus EXPORT to create a migration file
• On the target subsystem
• Use Recover Plus to IMPORT with SYNC AUTO
• Only refreshes data that was changed on the source and/or the target
• No need to rebuild indexes
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Summary
• BMC Software provides several different ways to
• Create consistent image copies
• Migrate data
• Refresh data
• Mix and match to suit your environment
• All options provide
• Speed
• Efficiency
• Ease of use
• If you would like a copy of this presentation
• We will be at the booth or email us
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Phil Grainger
Donna Di Carlo
BMC Software
[email protected]
[email protected]
Session Code: 414
Recovery Management Solution
50 Ways to Move Your Data
(a.k.a., Make a New Plan Stan)
Evaluate my session online:
www.idug.org/na2013/eval

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