IBM Systems Magazine, Mainframe edition - September/October 2013 - 44

ADMINISTRATOR

be on the same physical layer-2
(e.g., Sysplex Distributor) typically deployed within
It’s intended to become an open,
network. For RoCE, this means
z/OS Parallel Sysplex* environments for enhanced
pervasive industry protocol.
each host must have direct access
scalability, performance and high availability. When
Accordingly, an informational
to the same physical Ethernet
clients access z/OS servers via Sysplex Distributor,
draft request for comment (RFC)
LAN—that is, reachable using
networking overhead and latency can be significantly
has been submitted to the Internet
a standard Ethernet switched
reduced if VIPAROUTE is enabled and both client and
Engineering Task Force.
fabric. A standard 10GbE Ethernet
server use SMC-R. That’s because TCP connection
SMC-R provides efficient host-toswitch that’s 802.3x flow controltraffic will bypass the Sysplex Distributor node after
host direct memory communication
enabled can be used to attach to the
the connection is established.
without incurring significant
RoCE Express feature. Converged
Many key TCP/IP security features—such as IP
TCP/IP processing overhead. It
Enhanced Ethernet capability
filters and System Authorization Facility-based
also protects organizations’ IT
isn’t required.
network access control checks—are preserved with
investments by allowing them to
With z/OS, SMC-R visibility
no administrative changes required when SMC-R is
leverage existing TCP sockets-based
is provided through updates to
enabled. It’s fully compatible with TCP-based network
applications and workloads while
traditional network management
encryption and authentication technologies such
transparently exchanging data
functions such as NetStat,
as Transport Layer Security and SSL. However, IP
using RDMA over existing Ethernet
Systems Management Facility,
layer encryption/authentication technologies, such
infrastructures. SMC-R provides
Resource Measurement Facility
as IPSec, aren’t compatible with SMC-R and RoCE;
low-latency communications while
and Network Management
SMC-R enablement is automatically bypassed for any
preserving key qualities of service,
Interface. The SMC-R architecture
connections that require IPSec.
such as network security, resiliency,
allows z/OS servers to exploit
SMC-R also preserves key qualities of service
scalability and load balancing.
RDMA with minimal configuration
for network management, such as minimal IP
To achieve this, SMC-R uses
and operational changes. Using
configuration and operational changes, dynamic
TCP to establish and terminate
SMC-R, RoCE Express doesn’t
discovery of partner RDMA capabilities and dynamic
connections and monitor heartbeat
require any form of IP addressing,
RDMA connection setup.
functions. Figure 2 (page 44)
user-defined Media Access
Because RoCE traffic isn’t routable, communication
illustrates how this dynamic inControl addresses or software
solutions using RDMA require participating hosts to
line negotiation begins by using
stack IP interface
TCP options to indicate
definitions. RoCE
whether both peers are
Figure 2: SMC-R Protocol Overview
Express is based on PCI
SMC-R capable. If so,
Express architecture
they exchange RDMA
and defined in
credentials within the
SMC-R enabled
SMC-R enabled
platform
platform
the System z I/O
TCP connection flows,
configuration, using
similar to SSL negotiation.
Middleware/Application
Middleware/Application
Hardware Configuration
If SMC-R negotiations
Sockets
Sockets
Definition (HCD) and
are successful, the TCP
in the TCP/IP profile
connection remains
as PCI Function IDs
active but dynamically
TCP
TCP
(PFIDs).
transitions to exchange
SMC-R
SMC-R
PFIDs are logically
data out-of-band,
IP
IP
and dynamically
using RDMA in a
Interface
Interface
grouped with Open
manner transparent to
RNIC ETH
ETH RNIC
System Adapter-Express
applications. This model
(OSA-Express) features,
preserves the critical
TCP connection established over IP
Data exchanged
Data exchanged
used for TCP connection
operational and network
using RDMA
using RDMA
establishment. Based
management features of
TCP syn flows
on physical network
TCP/IP.
(TCP Option SMCR)
association, this
grouping is defined
The Benefits
RDMA Network (RoCE)
by a new network
of TCP Preserved
configuration option
The hybrid nature of
IP Network (Ethernet)
called Physical Network
SMC-R allows coexistence
IDs (PNet IDs). These
with TCP connection
are defined for OSA and
load-balancing solutions
44 // SEPTEMBER/OCTOBER 2013 ibmsystemsmag.com


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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
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE23
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE24
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE25
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE26
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE27
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE28
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE29
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE30
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE31
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE32
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE33
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE34
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE35
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IBM Systems Magazine, Mainframe edition - September/October 2013 - SE37
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE38
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE39
IBM Systems Magazine, Mainframe edition - September/October 2013 - SE40
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