near-zero downtime maintenance for sap process ... facts: near-zero downtime maintenance tool for...

near-Zero Downtime Maintenance for SAP Process

Integration SP 07 (nZDM PI)

Martin Herrmann, Product Management Cloud & Lifecycle Management Customer

© 2015 SAP SE or an SAP affiliate company. All rights reserved. 2 Customer

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and SAP's strategy and possible future developments, products and or platforms directions and functionality are all

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Solution Characteristics near-Zero Downtime Maintenance tool for SAP Process Integration dual-stack SP07 (nZDM PI)

Downtime minimization capabilities in Software Update Manager 1.0 SP 13 (SUM) for SAP Process

Integration dual-stack


Downtime minimization for SAP Process Integration nZDM tool for PI and capabilities in Software Update Manager (SUM)

nZDM tool for PI:

Apply support package on top of

PI 7.10 dual-stack

PI 7.11 dual-stack

PI 7.30 dual-stack

PI 7.31 dual-stack

nZDM capabilities in SUM:

Upgrade from SAP PI 7.10, PI 7.11 to SAP

PI 7.31

Apply EhP1 on top of PI 7.30 DS

PI 7.10

dual-stack

PI 7.11

dual-stack

PI 7.30

dual-stack

PI 7.31

dual-stack

nZDM-Tool for PI

Downtime

Minimization in

SUM

PI 7.0

dual-stack

nZDM-support available

Downtime Minimization support in SUM

Traditional update/upgrade


Quick facts: near-Zero Downtime Maintenance tool for SAP PI

nZDM PI is a downtime optimized tool which is based on a copy of

repository tables:

Setup of update system (copy of non-transactional data)

SP (hot fixes, patches) implementation on update system

Copy updated tables to production system and switch production

system

nZDM PI

Is a specific tool for SP updates of PI dual stack systems (integration

server)

Is available for all SAP PI 7.10, 7.11, 7.30 and 7.31

Availability of business critical functions during most time of the

maintenance

Business downtime is reduced to switch (app. 30 minutes)

SCN: DOC-33260

http://scn.sap.com/docs/DOC-33260




nZDM for SAP PI – Value & Benefit

Business criticality:

All standard PI scenarios are fully available during business only mode

Impact for user minimized, downtime reduced to app. 30 minutes

SP implementation project:

Potential Issues during SP implementation without affect to business downtime

Point in time for switching can be chosen freely

The overall business downtime is independent of number and size of the SPs and

other content to be applied to the system


Example of productive usage of nZDM PI

SP Update was applied to the productive system with ~ 30 min downtime without any issues (95% less downtime)

nZDM PI procedure worked on customer environment without any issues.

nZDM/PI on de-central adapter engines (advanced adapter engine was switched before)

Procedure could be executed mainly by customer’s basis administrators with SAP onsite support

Procedure could be improved by customer input.

Errors during traditional SP deployment process increased downtime by 3 hours. With nZDM/PI procedure any potential error

resolution activities during SP deployment have no impact on business downtime.

Normal PI housekeeping was executed on production system.

System Duration Minimization

Method Business Downtime

Test 3 days nZDM PI nZDM PI: 26 minutes net.

Development 2 days - Regular Patching: 10 hours (traditional SP procedure, plus 3 hours caused by

problem solving)

Preproduction 3 days nZDM PI nZDM/PI: 34 minutes (incl. Clean up)

Production 3 days nZDM PI 30 minutes (incl. Clean up)


Process flow of the nZDM tool for PI in 6 steps

Production

System Update

System

5b-Downtime

Switch (non-transactional

data)

3- SP Update

2- Installation

1- Export of Production System

(non-transactional data)

4- Export of Update

System

nZDM/PI

5a-Uptime

Shadow import

6- Clean Up


nZDM/PI reduces the planned downtime for implementing SP stacks on a

SAP NetWeaver Process Integration system to basically one system restart (~ 30 - 60 minutes)

Benefits to use nZDM PI

Advantages for process and downtime:

Availability of business critical functions during most of maintenance process duration

Flexibility in downtime, the SP implementation is prepared in a separate system

The overall business downtime is independent of number and size of the SPs

The SP implementation procedure is nearly de-coupled from the system availability, potential issues during actual SP

application do not affect the business downtime


Downtime minimization capabilities of SUM for SAP PI

Downtime minimization capabilities for PI in SUM

No change of existing upgrade scenario for PI in SUM

Parallel operation of production system and shadow system

Import of the substitution set into the shadow tables during production

operation (extended shadow) enables the near-Zero Downtime Maintenance

capabilities in uptime

Starting with SUM 1.0 SP12 or higher downtime minimization capabilities of SUM are available for

upgrades of SAP NetWeaver PI


How to get the downtime minimization capabilities for SAP

NetWeaver PI in SUM?

How to activate the capabilities in SUM?

See note 1825209

Availability for PI

Upgrade from SAP PI 7.10, PI 7.11 to SAP PI 7.31 / SAP PI 7.40

Apply EhP1 on top of PI 7.30 dual stack

Supports DB

Oracle

IBM DB2 LUW

Microsoft SQL

SAP MaxDB

SAP ASE

https://service.sap.com/sap/support/notes/1825209


References

Link to the Upgrade Master Guide of SAP NetWeaver Process Integration 7.31:

• Upgrade Master Guide - SAP Enhancement Package 1 for NetWeaver 7.3

Link to the Upgrade Guide of Software Update Manager (SUM) for SAP PI upgrade (dual stack)

• Update of SAP Systems Using Software Update Manager 1.0 SP12

•

Link update required

http://service.sap.com/~sapidb/011000358700001267932011E.pdf







https://websmp204.sap-ag.de/~sapidb/011000358700000783632011E




A tool-guided maintenance process near-Zero Downtime Maintenance tool for SAP NetWeaver Process Integration (nZDM/PI)

See also SCN for further news: http://scn.sap.com/docs/DOC-33260





Cleanup

• Unrestricted production

High level flow of nZDM for PI

Production System Update System

Copied Production System

Copy non-transactional data

(DB tables not containing PI processing data)

of productive system SP n

SP n+m

SP n

SP n

SP n+m

Normal production

No restrictions

Business Only Mode

Only allow PI

processing

(all scenarios)

No non-PI change

operations

No config changes/

design time changes

Applying Support Package

Apply SP with JSPM/SPAM*

PI processing data

is not affected

System downtime (technical)

Manual system shutdown

Switch system

Manual system startup

Copy back updated non-transactional data (in

shadow tables)

time

Installation

Export of the

Update System

Import + prepare switch

Check consistency

* Will be changed to SUM in future


nZDM/PI tool: a guided maintenance process (1/5) General principle of user guidance

Utilized in an automated way

controlled by SAPinst

Procedure is organized by steps

Each nZDM/PI step contains:

Choose option screen

Define parameters section

Summary screen to check/correct

parameter settings

Execution phase

Completion status screen

Manual user interactions are

triggered and monitored by the

nZDM PI tool










parameter settings

Execution phase




nZDM PI tool


nZDM for PI tool: a guided maintenance process (4/5) General principle of user guidance








parameter settings

Execution phase




nZDM PI tool


nZDM for PI tool: a guided maintenance process (5/5) General Principle of User Guidance








parameter settings

Execution phase




nZDM for PI tool

Technical Details

Near-Zero Downtime Maintenance tool for SAP Process Integration (nZDM/PI)


nZDM PI tool: availability and system requirements

Availability

General availability since for SL Toolset SP6

Supported DB-/OS-Platforms according to PAM: 1)

SAP MaxDB on Windows, Unix

MS SQL on Windows

Oracle on Windows, Unix

IBM DB2 on LUW on Windows, Unix

SAP ASE

Requirements on Production System

Supported releases and start SP levels:

SAP NetWeaver PI 7.10 SP 5 or higher




Required additional Hardware

A separate update host for the nZDM PI Procedure

with same OS version as the CI host of the

concerned system

Memory & local disk space requirements for the

update host:

Memory as required for a small SAP NetWeaver AS

ABAP & Java system (8 GB)

20 GB disc space for swap files

10 GB disc space for SAP & DB software

50 GB disc space for the database

Additional local disc space on the DB host of the

production system:

ca. 40 GB space in the Database for the shadow tables

of the nZDM PI procedure

1) Combinations in detail can be found in note 1435235


Data classification for nZDM PI procedure

Transaction data: •PI messages, Workflow, IDOC

•ARFC

•Monitoring, Alerting

•Spool, Batch

Temporary data: •Buffered/generated data, updated

automatically

•Temp. data, obsolete after syst. restart

Default category: •Configuration/design time data

•Repository data

•Unused tables

Upgrade exchange data: •Central ABAP repository data

•Switch technology

Production System - data access Update System - data access

Permanent read/write


Read only •Write accesses prevented /

monitored by db triggers.

•Trigger log data evaluation

before switch

Typically read only •Write accesses from on-the-fly

generations in some cases




Typically no access •Read/write access in

some neglectable cases

(e.g. spool/batch)

Non-TD tables

TD tables


nZDM PI tool: constraints

Solution is designed for dual stack PI only

During runtime of nZDM PI, the production system must be set to

‘business-only’ mode

Production restrictions during update (business only mode)

No configuration and design time changes

No transports/deployments

No changes of user master data, authorizations and user roles

Password changes and locking/unlocking users is possible

Recommended: Lock dialog users, which are not needed for running PI scenarios

De-Schedule background jobs and other activities, which are not essential

Deactivate Process Monitoring Infrastructure (PMI)


Note 1435235: additional info for nZDM PI

Additional info related to

nZDM procedure

Solutions/Explanation of potential issues especially DB

related

Critical changes

At the end of uptime part of Step 5 (shadow import into the

production system) nZDM-PI checks the database tables to

ensure consistency. Check the already known events

Follow up

Important notes for central configuration wizard (PI-CTC)

Restrictions

See restrictions related to NW 7.31


Procedure reset

Terminate procedure

In case of critical changes

In other cases

Reset of the procedure

Starting SAPinst for undoing nZDM PI

changes on the SAP system

Including some manual actions

A procedure reset is possible as long as step 5b (downtime and

switch) of the nZDM PI procedure has not yet started

Links Near-Zero Downtime Maintenance tool for SAP Process Integration (nZDM PI)


Key links for more information

Key links SCN

Software Logistics http://scn.sap.com/community/it-

management/alm/software-logistics/

Business Continuity Community http://scn.sap.com/community/business-continuity

Road maps on SAP Service Marketplace http://service.sap.com/roadmap

SCN Articles

• Minimizing planned downtime during maintenance http://scn.sap.com/docs/DOC-62584

• Near-Zero Downtime Management for SAP Process

Integration (nZDM PI) available on Service

Marketplace


• SAP Process Integration and Near Zero Downtime

Tool - An How-to Guide


Service Marketplace

• Software Logistics Toolset (User Guide nZDM PI) http://service.sap.com/sltoolset

http://scn.sap.com/community/it-management/alm/software-logistics/





http://scn.sap.com/community/business-continuity



http://service.sap.com/roadmap










http://service.sap.com/sltoolset


SAP Idea Place Influence the Future of the Software Update Manager

SAP Idea Place is your public channel to participate in innovation at SAP

Enables you to submit ideas, collaborate on and vote for ideas how to improve the Software

Update Manager, and connect you with the team that builds the SUM.

Complements traditional channels of interaction and feedback at SAP

Contribute under http://ideas.sap.com Browse Active Idea Sessions

Stand-alone Idea Session Software Logistics

Category Maintenance and upgrade management

http://ideas.sap.com/


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developments, products, and/or platform directions and functionality are all subject to change and may be changed by SAP SE or its affiliated companies at any time

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looking statements are subject to various risks and uncertainties that could cause actual results to differ materially from expectations. Readers are cautioned not to place

undue reliance on these forward-looking statements, which speak only as of their dates, and they should not be relied upon in making purchasing decisions.

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