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The zIIP’s execution environment will accept eligible work
from z/OS (z/OS.e) 1.6 and above, which will manage and
direct
the work between the general purpose processor
and the zIIP. The zIIP is designed so that a program can
work with z/OS (z/OS.e) to have all or a portion of its Ser-
vice Request Block (SRB) dispatched work directed to the
zIIP. The zIIP is available on the System z9 mainframe, and
its introduction can help increase the value that customers
may derive from the System z9 mainframe over previous
generations of the IBM mainframe.
DB2 for z/OS V8 (and DB2 9 for z/OS) will exploit the zIIP
capability for portions of eligible workload. Eligible work that
access DB2 (such as Customer Relationship Management
(CRM), Enterprise Resource Planning (ERP), Business Intel-
ligence (BI), and data warehousing applications), can have
portions of their work directed to the zIIP. Types of eligible
DB2 for z/OS workloads executing in SRB mode, all or a
portion of that can be sent to the zIIP include
:
• For Network Connected Applications - An application
(running on UNIX
®
, Linux, Intel
®
, Linux on System z9
or z/OS) may access a DB2 for z/OS database that is
hosted on a z9 BC. Eligible work that can be directed
to the zIIP are portions of those requests made from
the application server to the host via SQL calls over a
DRDA
®
over TCP/IP connection. DB2 for z/OS gives
z/OS the necessary information to direct portions of the
eligible work to the zIIP. Examples of workloads that may
be running on the server connected via DRDA over TCP/
IP to the z9 BC may include BI, ERP, or CRM application
serving. IBM’s DB2 Connect
™
is an example of IBM soft-
ware that uses DRDA over TCP/IP.
• For Data Warehousing Applications - Applications may
execute queries to a DB2 for z/OS database that is hosted
on a z9 BC. Eligible work that can be directed to the zIIP
are portions of requests that utilize star schema parallel
queries. DB2 for z/OS gives z/OS the necessary informa-
tion to direct portions of these queries to the zIIP. Exam-
ples of these applications may include BI applications.
•
There are some internal DB2 for z/OS utility functions
(LOAD, REORG and REBUILD INDEX), written in SRB
mode, that are used to maintain index maintenance
structures. Eligible work that can be directed to the zIIP
are portions of those utility functions that execute in SRB
mode. DB2 for z/OS gives z/OS (z/OS.e) the necessary
information to direct a portion of these functions to the zIIP.
If a star schema parallel query comes in remotely via
DRDA over TCP/IP, a portion of the workload coming
across the DRDA over TCP/IP connection can be redi-
rected to the IBM zIIP, along with the portion of the star
schema parallel query processing that is redirected.
In addition to DB2 exploitation of the zIIP, the z/OS Com-
munications Server will be enhanced to allow IPSec pro-
cessing to take advantage of zIIPs. The new zIIP Assisted
IPSec function is designed to move most of the IPSec pro-
cessing from general purpose processors to the zIIPs. In
addition to performing eligible encryption processing, the
zIIP will also handle cryptographic validation of message
integrity, and IPSec header processing. This is designed
to allow you to take advantage of the cost saving benefi ts
of the zIIP when you implement IPSec to secure your valu-
able business transactions and bulk data movement and
to protect your host. Specifi cally, the z/OS Communication
Server is designed to interact with z/OS Workload Manager
to have all of its enclave Service Request Block (SRB) work
made eligible to run on the zIIP. This capability is planned
to be available in August 2007 with z/OS 1.8 and PTFs,
and native in z/OS 1.9, when available.
The zIIP will help customers be able to integrate and
secure their database workloads, better leverage the data
that they have on the mainframe and free up capacity on
the general purpose processor which may make it avail-
able for use by other workloads running on the server.