IBM Systems Magazine, Mainframe edition - September/October 2013 - 40

TECH CORNER

DATA Crunching
New zEDC Express adapter compresses data faster while using less CPU
he IBM System z* platform has a new I/O adapter that compresses and
decompresses data using the industry-standard Deflate algorithm. Supported by
the zEnterprise* Data Compression (zEDC) feature of z/OS* V2.1, the zEDC Express
adapter is optional with the zEnterprise EC12 and zEnterprise BC12. It can compress
data at more than 1 GB per second while using roughly 100 times less CPU than
software implementations of the same algorithm.

T

Cecilia
Carranza
Lewis is a senior
technical staff
member with
IBM Systems
and Technology
Group.
Anthony Sofia
is an advisory
software engineer
working in IBM
Systems and
Technology
Group.
Peter Sutton
is an IBM
Distinguished
Engineer.

Undoubtedly, System z servers
host massive amounts of data.
Compression has long been used
to increase the effectiveness of
memory buffering, reduce the
storage space needed and improve
the performance of transmitting
data. Every mainframe deployed
today includes a unique
compression engine on the CPU
chip optimized to rapidly compress
and decompress data—typically
short DB2* row data. Data
compressed with this compression
coprocessor uses less space
throughout the memory hierarchy,
in memory buffers at rest on disk
and in flight during replication.
This coprocessor uses CPU cycles
during compression, so users must
choose whether to spend their CPU
cycles to save disk and memory
space. Each user has specific
requirements that lead to different
approaches to compression. For
example, some compress extended
format sequential data while
others don’t compress any at all.
Almost all DB2 users compress
some but not all DB2 buffers.
The zEDC Express has a
different role and optimization
point. Instead of compressing

40 // SEPTEMBER/OCTOBER 2013 ibmsystemsmag.com

short DB2 rows with a System z
optimized compression algorithm,
it’s designed to compress
relatively large blocks of
sequential data using an existing
industry-standard compression
format without busying the
CPU. This gives System z users
new opportunities to exploit
compression throughout the
stack, including:
s !CCELERATED COMPRESSION
FOR CROSS
PLATFORM DATA
EXCHANGE Many vendors have
announced plans to use zEDC to
reduce the cost of compressing
data across platforms.
s #OMPRESSION OF EVEN
HIGHLY ACCESSED EXTENDED
FORMAT SEQUENTIAL FILES
The low CPU cost of zEDC
Express compression will
make it sensible to compress
files accessed by BSAM and
QSAM that previously would
have required too much
CPU overhead to compress
economically. Support for this
function in BSAM and QSAM
is planned.
s -IGRATION AND BACKUP
SUPPORT DFSMSdss and

DFSMShsm are planned to
exploit zEDC for DFSMSdss
dumps to disk, and for
DFSMShsm backup and
migration of data to disk.
s 4RANSPARENT ACCELERATION
OF *AVA
 APPLICATIONS Java
is planned to invoke zEDC
acceleration for applications
that use the java.util.zip Deflater
and Inflater classes. Existing
programs that use these APIs are
transparently accelerated.

$EFLATE AND ZLIB
Deflate is an industry-standard
compressed data format,
described by RFC1951, and
available in software on most
computer platforms, including
z/OS. The zlib open source library
is a C implementation commonly
used to provide compression and
decompression services.
Many tools that exchange data
between platforms either directly
use zlib or use the various stream
classes provided by java.util.zip,
which indirectly invoke zlib.
The z/OS support for zEDC
Express includes a version of
zlib that transparently exploits
hardware compression. This


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IBM Systems Magazine, Mainframe edition - September/October 2013

Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe edition - September/October 2013

Table of Contents
Editor's Desk: zBC12 doesn't skip a beat
IBM Perspective: Strengthening the experience
Techbits: A microscopic short film
Partner PoV: End-to-end transaction management helps uncover and address CPU challenges
Q&A: 'Father of DB2' Don Haderle looks back-- and to the future
IT Today: Linux support for applications offers a compelling advantage
Case Study: Right Time, Right Place: ARBURG uses mainframe technology and SAP software to create an information-centric environment
Cover Story: Introducing zBC12 and IBM zEnterprise Innovations: New platform extends enterprise-class technologies to clients of all sizes, System z GM Pat Toole says
Feature: Stand Out From the Crowd: Latest zEnterprise extends innovation, performance and security to help businesses differentiate their customer service
Tech Corner: New zEDC Express adapter compresses data faster while using less CPU
Administrator: SMC-R protocol strengthens data sharing performance while reducing CPU costs
Solutions: ZEN TRACE & SOLVE; MegaCryption; Universal SSH Key Manager; TestBase
Stop Run: DB2 pioneer dances his way across the country
Reference Point - Global Events, Education, Resources for Mainframe
2014 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe edition - September/October 2013 - Intro
IBM Systems Magazine, Mainframe edition - September/October 2013 - Cover1
IBM Systems Magazine, Mainframe edition - September/October 2013 - Cover2
IBM Systems Magazine, Mainframe edition - September/October 2013 - 1
IBM Systems Magazine, Mainframe edition - September/October 2013 - Table of Contents
IBM Systems Magazine, Mainframe edition - September/October 2013 - 3
IBM Systems Magazine, Mainframe edition - September/October 2013 - 4
IBM Systems Magazine, Mainframe edition - September/October 2013 - 5
IBM Systems Magazine, Mainframe edition - September/October 2013 - Editor's Desk: zBC12 doesn't skip a beat
IBM Systems Magazine, Mainframe edition - September/October 2013 - 7
IBM Systems Magazine, Mainframe edition - September/October 2013 - IBM Perspective: Strengthening the experience
IBM Systems Magazine, Mainframe edition - September/October 2013 - 9
IBM Systems Magazine, Mainframe edition - September/October 2013 - Techbits: A microscopic short film
IBM Systems Magazine, Mainframe edition - September/October 2013 - 11
IBM Systems Magazine, Mainframe edition - September/October 2013 - Partner PoV: End-to-end transaction management helps uncover and address CPU challenges
IBM Systems Magazine, Mainframe edition - September/October 2013 - 13
IBM Systems Magazine, Mainframe edition - September/October 2013 - 14
IBM Systems Magazine, Mainframe edition - September/October 2013 - 15
IBM Systems Magazine, Mainframe edition - September/October 2013 - Q&A: 'Father of DB2' Don Haderle looks back-- and to the future
IBM Systems Magazine, Mainframe edition - September/October 2013 - 17
IBM Systems Magazine, Mainframe edition - September/October 2013 - 18
IBM Systems Magazine, Mainframe edition - September/October 2013 - 19
IBM Systems Magazine, Mainframe edition - September/October 2013 - IT Today: Linux support for applications offers a compelling advantage
IBM Systems Magazine, Mainframe edition - September/October 2013 - 21
IBM Systems Magazine, Mainframe edition - September/October 2013 - 22
IBM Systems Magazine, Mainframe edition - September/October 2013 - 23
IBM Systems Magazine, Mainframe edition - September/October 2013 - Case Study: Right Time, Right Place: ARBURG uses mainframe technology and SAP software to create an information-centric environment
IBM Systems Magazine, Mainframe edition - September/October 2013 - 25
IBM Systems Magazine, Mainframe edition - September/October 2013 - 26
IBM Systems Magazine, Mainframe edition - September/October 2013 - 27
IBM Systems Magazine, Mainframe edition - September/October 2013 - Cover Story: Introducing zBC12 and IBM zEnterprise Innovations: New platform extends enterprise-class technologies to clients of all sizes, System z GM Pat Toole says
IBM Systems Magazine, Mainframe edition - September/October 2013 - 29
IBM Systems Magazine, Mainframe edition - September/October 2013 - 30
IBM Systems Magazine, Mainframe edition - September/October 2013 - 31
IBM Systems Magazine, Mainframe edition - September/October 2013 - 32
IBM Systems Magazine, Mainframe edition - September/October 2013 - 33
IBM Systems Magazine, Mainframe edition - September/October 2013 - Feature: Stand Out From the Crowd: Latest zEnterprise extends innovation, performance and security to help businesses differentiate their customer service
IBM Systems Magazine, Mainframe edition - September/October 2013 - 35
IBM Systems Magazine, Mainframe edition - September/October 2013 - 36
IBM Systems Magazine, Mainframe edition - September/October 2013 - 37
IBM Systems Magazine, Mainframe edition - September/October 2013 - 38
IBM Systems Magazine, Mainframe edition - September/October 2013 - 39
IBM Systems Magazine, Mainframe edition - September/October 2013 - Tech Corner: New zEDC Express adapter compresses data faster while using less CPU
IBM Systems Magazine, Mainframe edition - September/October 2013 - 41
IBM Systems Magazine, Mainframe edition - September/October 2013 - 42
IBM Systems Magazine, Mainframe edition - September/October 2013 - Administrator: SMC-R protocol strengthens data sharing performance while reducing CPU costs
IBM Systems Magazine, Mainframe edition - September/October 2013 - 44
IBM Systems Magazine, Mainframe edition - September/October 2013 - 45
IBM Systems Magazine, Mainframe edition - September/October 2013 - Solutions: ZEN TRACE & SOLVE; MegaCryption; Universal SSH Key Manager; TestBase
IBM Systems Magazine, Mainframe edition - September/October 2013 - 47
IBM Systems Magazine, Mainframe edition - September/October 2013 - Stop Run: DB2 pioneer dances his way across the country
IBM Systems Magazine, Mainframe edition - September/October 2013 - Cover3
IBM Systems Magazine, Mainframe edition - September/October 2013 - Cover4
IBM Systems Magazine, Mainframe edition - September/October 2013 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE0
IBM Systems Magazine, Mainframe edition - September/October 2013 - 2014 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE2
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE3
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE4
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE5
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE6
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE7
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE8
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE9
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE10
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE11
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE12
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE13
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE14
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE15
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE16
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE17
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE18
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE19
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE20
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE21
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE22
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IBM Systems Magazine, Mainframe edition - September/October 2013 - SE31
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