IBM Systems Magazine, Mainframe - July/August 2012 - 50

Administrator
Depending on the size of your spool data set, its migration will take roughly the same amount of time as writing the same-sized data set on your system. Informal IBM laboratory testing typically migrated a milliontrack data set in a few hours, however, your results may vary.

Figure 1
Migrating Data Using Spool Migration

SOURCE SPOOL2

SPACE_USED

TARGET SPOOL5

LARGEST_FREE

Crank ’Er Up! With preparations made and space requirements confirmed, it’s time to migrate. Use this command to start:
$M SPL(SPOOL2),TARGET=SPOOL5

TARGET SPOOL5 MAPPED SPOOL2 TARGET SPOOL5 MAPPED SPOOL2

SPOOL5

The console will indicate migration has started and the first phase, INITIALIZING, has begun:

h CLEANUP—General cleanup is
$HASP808 Migration of SOURCE=SPOOL2 volume to TARGET=SPOOL5 volume RC=9 -- Migration INITIALIZING phase started.

TARGET=SPOOL5 volume RC=33 -- Migration processing completed. Migration was successful.

conducted at the end of the migration. Normally, console messages will only indicate the beginning and end of the migration, but the beginning and end of each phase will be written to SYSLOG. These messages can be routed to the console by running:
$T DEBUG,VERBOSE=YES

Spool migration involves six key phases:

h PENDING—Migration cannot
start right away.

h INITIALIZING—General
configuration work is being done.

h SETUP—This puts all multiaccess spool (MAS) members on the same page. h COPY—Allocated tracks from the
source volume’s data set are copied to the target volume. This takes the most time.

The $D SPL command can also provide status and progress information. During active migration, the source volume has a STATUS of MIGRATING. Using the PHASE parameter will display the current phase active in the migration. A better progress indicator, however, is the MPERCENT parameter, which displays the approximate percentage completed. It’s particularly useful during the COPY phase.

So the migration was successful, but is it really done? Well, the data that once resided in a SPOOL2 data set now exists in a SPOOL5 data set. So you can delete the data set on the source volume, and as far as JES2 is concerned, you can power off that DASD. In our example, jobs still think they have space allocations on SPOOL2. The command $D SPL:
$DSPL(spool2,spool5),stat us,percent $HASP893 VOLUME(SPOOL2) S TATUS= MAPPED,AWAITING(JOB S),PERCENT=97 $HASP893 VOLUME(SPOOL5) STATUS=ACTIVE,PERCENT=49 $HASP646 51.6330 PERCENT SPOOL UTILIZATION

h CATCHUP—Tracks that applications changed on the source volume during the COPY phase are recopied to the target volume. Time spent in this phase will depend on the amount of nonmigration activity that occurs on the source volume during copying.

Are We There Yet? At the conclusion of the migration, the console will state:
$HASP808 Migration of SOURCE=SPOOL2 volume to

STATUS = MAPPED means a logical control block exists representing SPOOL2 (a DAS). The migration moved SPOOL2 data—track by track—without understanding its usage

50

J U LY/AU G U S T 2 0 12

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IBM Systems Magazine, Mainframe - July/August 2012

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - July/August 2012

Editor's Desk: The Taste of Success
Dashboard: Pay by Phone - Current Conditions - Work Without Boundaries - Digital Personalities
IBM Perspective: The Performance of Many, the Efficiency of One
Trends: Why zBX Outperforms DIY When Deploying a Hybrid Infrastructure
Q&A: Accurate TCO Analysis Demonstrates the True Value of System z
IT Today: IBM's Integrated Solution for System z Streamlines Software Delivery
Case Study: Taking Shelter From the Storm: Shelter Insurance employs a measured approach in adopting Linux on zEnterprise 114
Cover Story: Internal Transformation: System z is at the center of initiative, which has saved the company $100 million so far
Feature: Large Memory Tames Big Data: The System z stack evolves to deliver business value from more memory
Tech Corner: A More Effective Comparison Starts With Relative Capacity
Administrator: JES2 Helps Expedite the Relocation of Data Volumes
Solutions: Double-Take Share 5.0 - Vanguard Security and Compliance Solutions - MegaCryption DB - ASG-TMON for DB2 - Reflection Suite for X - Orchestrated IT
Advertiser's Index
Stop Run: Wreck Diving Brings IBMer Face to Face With Lost History
Reference Point - Global Events, Education, Resources for Mainframe
IB Tape Storage
IBM Systems Magazine, Mainframe - July/August 2012 - Intro
IBM Systems Magazine, Mainframe - July/August 2012 - Cover1
IBM Systems Magazine, Mainframe - July/August 2012 - Cover2
IBM Systems Magazine, Mainframe - July/August 2012 - 1
IBM Systems Magazine, Mainframe - July/August 2012 - 2
IBM Systems Magazine, Mainframe - July/August 2012 - 3
IBM Systems Magazine, Mainframe - July/August 2012 - 4
IBM Systems Magazine, Mainframe - July/August 2012 - 5
IBM Systems Magazine, Mainframe - July/August 2012 - Editor's Desk: The Taste of Success
IBM Systems Magazine, Mainframe - July/August 2012 - 7
IBM Systems Magazine, Mainframe - July/August 2012 - Dashboard: Pay by Phone - Current Conditions - Work Without Boundaries - Digital Personalities
IBM Systems Magazine, Mainframe - July/August 2012 - IBM Perspective: The Performance of Many, the Efficiency of One
IBM Systems Magazine, Mainframe - July/August 2012 - Trends: Why zBX Outperforms DIY When Deploying a Hybrid Infrastructure
IBM Systems Magazine, Mainframe - July/August 2012 - 11
IBM Systems Magazine, Mainframe - July/August 2012 - 12
IBM Systems Magazine, Mainframe - July/August 2012 - 13
IBM Systems Magazine, Mainframe - July/August 2012 - 14
IBM Systems Magazine, Mainframe - July/August 2012 - 15
IBM Systems Magazine, Mainframe - July/August 2012 - Q&A: Accurate TCO Analysis Demonstrates the True Value of System z
IBM Systems Magazine, Mainframe - July/August 2012 - 17
IBM Systems Magazine, Mainframe - July/August 2012 - 18
IBM Systems Magazine, Mainframe - July/August 2012 - 19
IBM Systems Magazine, Mainframe - July/August 2012 - 20
IBM Systems Magazine, Mainframe - July/August 2012 - 21
IBM Systems Magazine, Mainframe - July/August 2012 - IT Today: IBM's Integrated Solution for System z Streamlines Software Delivery
IBM Systems Magazine, Mainframe - July/August 2012 - 23
IBM Systems Magazine, Mainframe - July/August 2012 - 24
IBM Systems Magazine, Mainframe - July/August 2012 - 25
IBM Systems Magazine, Mainframe - July/August 2012 - Case Study: Taking Shelter From the Storm: Shelter Insurance employs a measured approach in adopting Linux on zEnterprise 114
IBM Systems Magazine, Mainframe - July/August 2012 - 27
IBM Systems Magazine, Mainframe - July/August 2012 - 28
IBM Systems Magazine, Mainframe - July/August 2012 - 29
IBM Systems Magazine, Mainframe - July/August 2012 - 30
IBM Systems Magazine, Mainframe - July/August 2012 - 31
IBM Systems Magazine, Mainframe - July/August 2012 - Cover Story: Internal Transformation: System z is at the center of initiative, which has saved the company $100 million so far
IBM Systems Magazine, Mainframe - July/August 2012 - 33
IBM Systems Magazine, Mainframe - July/August 2012 - 34
IBM Systems Magazine, Mainframe - July/August 2012 - 35
IBM Systems Magazine, Mainframe - July/August 2012 - 36
IBM Systems Magazine, Mainframe - July/August 2012 - 37
IBM Systems Magazine, Mainframe - July/August 2012 - Feature: Large Memory Tames Big Data: The System z stack evolves to deliver business value from more memory
IBM Systems Magazine, Mainframe - July/August 2012 - 39
IBM Systems Magazine, Mainframe - July/August 2012 - 40
IBM Systems Magazine, Mainframe - July/August 2012 - 41
IBM Systems Magazine, Mainframe - July/August 2012 - 42
IBM Systems Magazine, Mainframe - July/August 2012 - Tech Corner: A More Effective Comparison Starts With Relative Capacity
IBM Systems Magazine, Mainframe - July/August 2012 - 44
IBM Systems Magazine, Mainframe - July/August 2012 - 45
IBM Systems Magazine, Mainframe - July/August 2012 - 46
IBM Systems Magazine, Mainframe - July/August 2012 - 47
IBM Systems Magazine, Mainframe - July/August 2012 - Administrator: JES2 Helps Expedite the Relocation of Data Volumes
IBM Systems Magazine, Mainframe - July/August 2012 - 49
IBM Systems Magazine, Mainframe - July/August 2012 - 50
IBM Systems Magazine, Mainframe - July/August 2012 - 51
IBM Systems Magazine, Mainframe - July/August 2012 - Solutions: Double-Take Share 5.0 - Vanguard Security and Compliance Solutions - MegaCryption DB - ASG-TMON for DB2 - Reflection Suite for X - Orchestrated IT
IBM Systems Magazine, Mainframe - July/August 2012 - 53
IBM Systems Magazine, Mainframe - July/August 2012 - Advertiser's Index
IBM Systems Magazine, Mainframe - July/August 2012 - Stop Run: Wreck Diving Brings IBMer Face to Face With Lost History
IBM Systems Magazine, Mainframe - July/August 2012 - 56
IBM Systems Magazine, Mainframe - July/August 2012 - Cover3
IBM Systems Magazine, Mainframe - July/August 2012 - Cover4
IBM Systems Magazine, Mainframe - July/August 2012 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - July/August 2012 - BG1
IBM Systems Magazine, Mainframe - July/August 2012 - BG2
IBM Systems Magazine, Mainframe - July/August 2012 - IB Tape Storage
IBM Systems Magazine, Mainframe - July/August 2012 - T2
IBM Systems Magazine, Mainframe - July/August 2012 - T3
IBM Systems Magazine, Mainframe - July/August 2012 - T4
IBM Systems Magazine, Mainframe - July/August 2012 - T5
IBM Systems Magazine, Mainframe - July/August 2012 - T6
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