IBM Systems Magazine, Mainframe - May/June 2016 - 42

TECH CORNER

Systems administrators can
now change this behavior and
scratch data sets, even when
the retention period has not yet
been met. For Removable Media
Manager (RMM) customers, the
WHILECATALOG attribute for
data sets allows users to specify
whether data sets should be
retained or expired by date when
catalog entries for them exist.
This is helpful for GDG data
sets on tape. RMM customers
can now use SEARCHDATASET
and SEARCHVOLUME TSO
commands to select records by
creation date and time.

ICF Flexibility
When DB2 customers are looking
at integrated catalog facility (ICF)
performance or recovery-related
issues, they often want to issue
reporting types of commands
to the catalog address space
without modifying the catalog
configuration. With z/OS V2.2,
a new RACF* resource profile is
checked by catalog command
processing to ensure the issuer
of a command is authorized to
execute the command (e.g., have
the authority to issue command
F CATALOG,ALLOCATED but not
F CATALOG,CLOSE(usercat) ).
Other enhancements include
the capability of DSS to restore
an ICF user catalog to any
volume serial number, not just
where it was dumped. This
applies to logical restores only.
Restrictions for physical data set
restore remain.
Some DB2 customers ask for
an IDCAMS REPRO MERGECAT
(move or copy catalog entries
from one ICF user catalog to
another) to be executed. The
output can be enormous, as it
produces up to six lines for each
entry processed. New keyword
MESSAGELEVEL(ALL|SHORT)
provides users a short version of
the output.

IDCAMS PRINT and REPRO
functions can now process
damaged VSAM control
intervals or records using
new keyword CIMODE.

Space Allocation
Storage Management Subsystem
(SMS) has a handy feature in
the data class called Space
Constraint Relief (SCR). If the
storage group doesn't have
enough space for a request on
any volume, the requested space
is reduced by the Interactive
Storage Management Facility
value Reduce Space Up To (%).
For example, if SCR is set to
10 percent and a DB2 data set
would like to allocate 1,000
cylinders, but no volume in
the storage group has 1,000
cylinders free, the request is
automatically redriven at 900
cylinders. With z/OS V2.2, this
feature applies to data sets with
the storage class specification
of guaranteed space as well. A
new sub-parameter, Guaranteed
Space Reduction (Y|N), is
added to the data class panel.
Although DB2 user data sets
generally shouldn't have
guaranteed space specified,
this allows for the possibility
of fewer space-related failures
when specified.
SCR can also be used for
secondary space allocations.
Prior to z/OS V2.2, if a secondary
space request was for 100
cylinders and the volume didn't
have 100 cylinders, we hit the
End of Volume command and
chose another volume to extend
to. With z/OS V2.2, we also use
SCR for extents to reduce the 100
cylinders to the SCR value. In our
scenario, with the 100 cylinders
secondary request and an SCR of
40 percent, the allocation can be
anything at or above 60 cylinders
and can vary from time to time.
If reduced, the allocation may be

42 // MAY/JUNE 2016 ibmsystemsmag.com

60 cylinders, and at other times
90 cylinders, but not below 60
cylinders in this scenario. This
support is for SMS-managed,
non-striped VSAM data sets and
non-VSAM data sets.
From time to time, DB2
customers may see space-related
information in the DBM1 STC or
other output, such as IDCAMSrelated output. This message
states that the cumulative space
allocated on the selected storage
group has exceeded HIGH value:
IGD17380I STORAGE GROUP
(sgname) IS ESTIMATED AT
xx% OF CAPACITY, WHICH
EXCEEDS ITS HIGH ALLOCATION
THRESHOLD OF zz%. SMS
now allows you to specify new
storage group space warning
thresholds separately from
the high allocation threshold.
New alert messages IGD400I
and IGD401I will be issued to
the console at an incremental
interval when the alert threshold
has been reached. IGD401I is
issued only for volumes in a
storage group containing one or
more EAV volumes. This allows
DB2 customers to set a lower
threshold for warning messages,
which can provide more time
to react to storage group space
shortage conditions.
z/OS command D SMS has
a new ALERT keyword that
displays any storage group that
has reached either the total
space alert threshold or the
track-managed alert threshold.
This allows for added insurance
when the high-exceeded
messages are overlooked.
Storage administrators
sometimes struggle to keep
the automatic class selection
(ACS) routines in relative
synch between test and
production environments.
SMS now provides a userdefined ACS read-only variable
USER_ACSVAR used in SYS1.


http://www.ibmsystemsmag.com

IBM Systems Magazine, Mainframe - May/June 2016

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - May/June 2016

Table of Contents
Editor's Desk: Flexible and agile environment
IBM Perspective: Elevating open source for the enterprise
Partner PoV: New information about threats in the z/OS system improves performance
The new IBM z13 can consolidate Linux workloads at a lower cost
Focus on Storage: IBM Spectrum Storage Suite offers a new way of licensing storage software
Cover Story: Achieving An Advantage: Linux on z Systems enables the API economy and microservices while enhancing hybrid cloud solutions
Feature: A Better Option: Businesses see an advantage to using Linux on z Systems over scale-out servers
Tech Showcase: CISOs can mitigate mobile security fears and prevent issues in the workplace
Tech Corner: IBM DB2 on z/OS V2.2 features space and storage ehancements
Administrator: IBM Multi-Factor Authentication fo z/OS helps maintain a secure infrastructure
Solutions: Universal Data Manager; OpenLegacy V3.0
Stop Run: 19-year-old mainframe enthusiast installs a z890 in his parents' basement
Reference Point - Global Events, Education, Resources for Mainframe
2016 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - May/June 2016 - Intro
IBM Systems Magazine, Mainframe - May/June 2016 - Cover1
IBM Systems Magazine, Mainframe - May/June 2016 - Cover2
IBM Systems Magazine, Mainframe - May/June 2016 - 1
IBM Systems Magazine, Mainframe - May/June 2016 - Table of Contents
IBM Systems Magazine, Mainframe - May/June 2016 - 3
IBM Systems Magazine, Mainframe - May/June 2016 - 4
IBM Systems Magazine, Mainframe - May/June 2016 - 5
IBM Systems Magazine, Mainframe - May/June 2016 - Editor's Desk: Flexible and agile environment
IBM Systems Magazine, Mainframe - May/June 2016 - 7
IBM Systems Magazine, Mainframe - May/June 2016 - IBM Perspective: Elevating open source for the enterprise
IBM Systems Magazine, Mainframe - May/June 2016 - Partner PoV: New information about threats in the z/OS system improves performance
IBM Systems Magazine, Mainframe - May/June 2016 - 10
IBM Systems Magazine, Mainframe - May/June 2016 - The new IBM z13 can consolidate Linux workloads at a lower cost
IBM Systems Magazine, Mainframe - May/June 2016 - 12
IBM Systems Magazine, Mainframe - May/June 2016 - 13
IBM Systems Magazine, Mainframe - May/June 2016 - 14
IBM Systems Magazine, Mainframe - May/June 2016 - Focus on Storage: IBM Spectrum Storage Suite offers a new way of licensing storage software
IBM Systems Magazine, Mainframe - May/June 2016 - 16
IBM Systems Magazine, Mainframe - May/June 2016 - 17
IBM Systems Magazine, Mainframe - May/June 2016 - Cover Story: Achieving An Advantage: Linux on z Systems enables the API economy and microservices while enhancing hybrid cloud solutions
IBM Systems Magazine, Mainframe - May/June 2016 - 19
IBM Systems Magazine, Mainframe - May/June 2016 - 20
IBM Systems Magazine, Mainframe - May/June 2016 - 21
IBM Systems Magazine, Mainframe - May/June 2016 - Feature: A Better Option: Businesses see an advantage to using Linux on z Systems over scale-out servers
IBM Systems Magazine, Mainframe - May/June 2016 - 23
IBM Systems Magazine, Mainframe - May/June 2016 - 24
IBM Systems Magazine, Mainframe - May/June 2016 - 25
IBM Systems Magazine, Mainframe - May/June 2016 - 26
IBM Systems Magazine, Mainframe - May/June 2016 - Tech Showcase: CISOs can mitigate mobile security fears and prevent issues in the workplace
IBM Systems Magazine, Mainframe - May/June 2016 - 28
IBM Systems Magazine, Mainframe - May/June 2016 - 29
IBM Systems Magazine, Mainframe - May/June 2016 - 30
IBM Systems Magazine, Mainframe - May/June 2016 - 31
IBM Systems Magazine, Mainframe - May/June 2016 - 32
IBM Systems Magazine, Mainframe - May/June 2016 - 33
IBM Systems Magazine, Mainframe - May/June 2016 - 34
IBM Systems Magazine, Mainframe - May/June 2016 - 35
IBM Systems Magazine, Mainframe - May/June 2016 - 36
IBM Systems Magazine, Mainframe - May/June 2016 - 37
IBM Systems Magazine, Mainframe - May/June 2016 - 38
IBM Systems Magazine, Mainframe - May/June 2016 - 39
IBM Systems Magazine, Mainframe - May/June 2016 - Tech Corner: IBM DB2 on z/OS V2.2 features space and storage ehancements
IBM Systems Magazine, Mainframe - May/June 2016 - 41
IBM Systems Magazine, Mainframe - May/June 2016 - 42
IBM Systems Magazine, Mainframe - May/June 2016 - 43
IBM Systems Magazine, Mainframe - May/June 2016 - Administrator: IBM Multi-Factor Authentication fo z/OS helps maintain a secure infrastructure
IBM Systems Magazine, Mainframe - May/June 2016 - 45
IBM Systems Magazine, Mainframe - May/June 2016 - 46
IBM Systems Magazine, Mainframe - May/June 2016 - Solutions: Universal Data Manager; OpenLegacy V3.0
IBM Systems Magazine, Mainframe - May/June 2016 - Stop Run: 19-year-old mainframe enthusiast installs a z890 in his parents' basement
IBM Systems Magazine, Mainframe - May/June 2016 - Cover3
IBM Systems Magazine, Mainframe - May/June 2016 - Cover4
IBM Systems Magazine, Mainframe - May/June 2016 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - May/June 2016 - 2016 Mainframe Solutions Edition Product Index
IBM Systems Magazine, Mainframe - May/June 2016 - SE2
IBM Systems Magazine, Mainframe - May/June 2016 - SE3
IBM Systems Magazine, Mainframe - May/June 2016 - SE4
IBM Systems Magazine, Mainframe - May/June 2016 - SE5
http://www.ibmsystemsmagmainframedigital.com/mspcomm/ibmsystemsmag/ibmsystems_mainframe_20200910
http://www.ibmsystemsmagmainframedigital.com/mspcomm/ibmsystemsmag/ibmsystems_mainframe_20200708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20200506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20200304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20200102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/2020mfse
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20191112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/relevantz_20190102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/2019mfse
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20190102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20181112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20180102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/2018mfse
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20171112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170910_v2
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_sesupp
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20170102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_linuxsupp
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20161112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/MainframeSecurity
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20160102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20151112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150910_se
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150910
http://www.ibmsystemsmagmainframedigital.com/MFSkills
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150506_supp
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20150102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20141112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140910_v2
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_gt_201405
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/BigData
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20140102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20131112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130910_v2
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20130102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20121112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/buyersguide2013
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20120102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/ibmsystems_mainframe_2012bg
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20111112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20110102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20101112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100910_bg
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100506
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100304
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20100102
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20091112
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20090910
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20090708
http://www.ibmsystemsmagmainframedigital.com/nxtbooks/ibmsystemsmag/mainframe_20090506
https://www.nxtbook.com/nxtbooks/ibmsystemsmag/mainframe_20090304
https://www.nxtbookmedia.com