Accelerate with IBM Storage: GDPS V4.3 and SPEs: What’s New? WSC...GDPS Global XRC 122 12% GDPS Global GM 174 16% GDPS Continuous Availability (AA) 7 1% 981 delta2019 total GDPS

© Copyright IBM Corporation 2020

Accelerate with IBM Storage:

GDPS V4.3 and SPEs: What’s New?

David Petersen, Distinguished Engineer, GDPS Architect

[email protected]

Washington Systems Center - Storage

© Copyright IBM Corporation 2020 Accelerate with IBM Storage

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GDPS Level-set

3



IBM GDPS is installed in some of the largest enterprises in the world.

4

83% of the top 40 banks

around-the-world use GDPS1

Over 20 years of experience

Almost 1000 licenses in 51countries and dozens of references

1Based on offering engagement data and the The Top 50 Banks in the World listing by relbanks.com, February 2016

+95% of the new GDPS

deployments are with DS8K

http://www.relbanks.com/worlds-top-banks/assets



Balanced solutions designed to address different requirements.

5

GDPS Metro

Near-continuous availability

(CA) and disaster recovery (DR)

within a metropolitan region

Two data centers

Systems can remain active

Multisite workloads can withstand

site and storage failures

DR RPO equals 0 and RTO is

less than 1 hour or

CA RPO equals 0 and RTO minutes

A B

PPRC

GDPS Global

Disaster recovery at

extended distance

Two data centers

More rapid systems disaster

recovery with “seconds” of data

loss

Disaster recovery for out-of-region

interruptions

RPO seconds and RTO less than 1 hour

A B

XRC

GM

SDM

Three or Four data centers

Near-continuous availability (CA)

and Disaster recovery (DR) when

running from any site

Designed for near-continuous

availability within either region and

RPO seconds and RTO less then one

hour for unplanned region fail-over

GDPS Metro Global

3 or 4-site Near-continuous availability

(CA) regionally and disaster

recovery (DR) at extended

distance from either region

A

D

B

C

RE

GIO

N I

XRC

GM

PPRC

RE

GIO

N I

I

PPRC | GC

GDPS Continuous Availability

Two or more data centers

Disaster recovery for out-of -region interruptions

All sites active

RPO zero or seconds and RTO seconds

Near-continuous availability, disaster recovery, and

cross-site workload balancing at extended distance

SW Replication

BA



GDPS License Demographics (year-end 2019)

GDPS installations by product type

Three/four site GDPS installations by product type

GDPS solution by Industry sector

0

200

400

600

800

1000

1200

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

yearly cumulative

Product Installed %RCMF (legacy) 77 8%

GDPS HyperSwap Capable 601 60%

GDPS Metro HM (PPRC HM) 95GDPS Metro (PPRC) 481GDPS Metro Dual Leg (MTMM) 25

GDPS Global XRC 122 12%

GDPS Global GM 174 16%

GDPS Continuous Availability (AA) 7 1%

981

delta2019 total

GDPS Metro Global XRC - 3 sites -1 49

GDPS Metro Global GM - 3 sites +9 99

GDPS Metro Global XRC - 4 sites +2/-2 8

GDPS Metro Global GM - 4 sites +1 14

Communication 5%

Distribution 5%

Finance 74%

Industrial 4%

Public 9%

Internal IBM 2%

SMB 1%



Solution names – reminder (last time – GDPS 3.14 EOS)

7

GDPS V3 name GDPS V4 full name GDPS V4 short name

GDPS/PPRC HM GDPS Metro HyperSwap Manager GDPS HM

GDPS/PPRC GDPS Metro GDPS Metro (Single Leg)

GDPS/MTMM GDPS Metro GDPS Metro (Dual Leg)

GDPS/XRC GDPS Global – XRC GDPS XRC

GDPS/GM GDPS Global – GM GDPS GM

GDPS/MzGM GDPS Metro Global – XRC GDPS MzGM

GDPS/MGM GDPS Metro Global – GM GDPS MGM

GDPS/A-A GDPS Continuous Availability GDPS CA

GDPS Virtual Appliance GDPS Virtual Appliance GVA



GDPS Priced Features

8

GDPS Feature Name GDPS Environment applicable Priced feature or

included?

xDR zVM GDPS Metro Included*

*Does require licenses for SA MP and its xDR feature

GDPS SSC Support (vIDAA) GDPS Metro & GDPS Metro Global - GM Separately priced

GDPS z/OS Proxy GDPS Metro Separately priced

GDPS KVM Proxy GDPS Metro Separately priced

Dual Leg GDPS Metro Separately priced*

*Can be ‘rented’ for migration purposes (3-month chunks of time)

GDPS LCP Manager All (see later charts for details) Separately priced

GDPS TestCopy Manager GDPS Metro Global – GM 4-site Separately priced

GDPS CA ZDL feature* GDPS Continuous Availability Separately priced

*Either short or long distance (see later for details on long-distance ZDL)



Key migration considerations first

9

• Unlike the last two releases, there are no key migration considerations, other than those in place before V4.1. That is,

• N, N-1 co-existence is supported

• GDPS 4.2 does however need pre-req APARs installed before you migrate the first system to 4.3 –check the PSP!

• We do however recommend not running in a mixed release configuration for long periods

• New functions typically require all systems to be at the new release level before being exploited

• Exceptions exist

• We test by updating K-sys, then P-sys

• Alternate K-sys first, then Master



Jan 7th 2020 DS8K announcement re: z/OS Global Mirror

10

IBM z/OS® Global Mirror support

For decades IBM has offered two asynchronous replication strategies, IBM z/OS Global Mirror (also known as

extended remote copy) and IBM DS8000® Global Mirror. Today, the majority of IBM clients are using or

migrating to Global Mirror. The IBM DS8900F family will be the last platform to support z/OS Global Mirror.

There will not be any new z/OS Global Mirror functions provided with IBM DS8900F, and new functions to

support asynchronous replication technology will be developed only for Global Mirror. z/OS Global Mirror will

continue to be supported and maintained on z/OS with its current function only.

• Existing DS8K XRC support is functionally stabilized

• GDPS and z/OS will continue to support XRC clients while running on hardware supporting XRC

• GDPS is offering a like-for-like supported license exchange program at no additional charge to enable clients to transition from XRC to GM (including MzGM to MGM)



Summary of updates for GDPS solutions

11



GDPS Metro Highlights

12

• Preserve Mirror Tool

• Configuration Wizard

• LCP enhancements (4.2 SPE)

• SGC support

• New topologies supported

• Management profiles

• Role-Based Security enhancements

• Std Actions (4.2 SPE)

• Sysplex script statement (4.2 SPE)

• Main panel options (4.3 SPE)

• Workflow enhancements

• Start a script from any step

• Inject a stop request to an executing script

• Reset a ‘failed’ script indicator

• Support for LOGRY/LOGRZ to allow use of System logger on K-sys (4.2 SPE)

• HMT performance enhancement (5-10x improvement for transfer of info to Alt-K)

• GDPS Virtual Appliance refresh (not 4.3 specifically)

• z/OS 2.3, NetView 6.2.1, SA 4.1, GDPS 4.1

• Now supports zVM SSI live guest relocation and KVM

• GDPS Health Check extensions

• z/OS Proxy-managed systems checks

• FB disk support (freeze/run with xDR protocol) (4.2 SPE)

• PD enhancement (RFE 134865)

• Determine the xDR maintenance level via GDPS plus ability to perform ‘get xdrstatus’ and ‘collect xdrlogs’

• SSC (vIDAA appliance) DR capability with GDPS (4.2 SPE)

• New GDPSPRIV CONFIG file for defining privileged commands/classes – imbed file from RS1 CONFIG

• Replaces CPCLASS EXEC



GDPS GM and MGM Highlights

13

• Reintroduction of CHGGMSITE command

• Removed in V4 incorrectly as use cases remain for it’s use

• Support for SSC (vIDAA) in an MGM 3-site and 4-site configuration

• Requires specific level of vIDAA

• Support for FlashCopy on to GM primary (GM and MGM RPFC stage 1)

• Workflow enhancements (as Metro)

• LCP on a GM code base (4.3 SPE)

• Supports physical isolation for MM2SITE topology + others

• Role-Based Security enhancements (4.3 SPE)



GDPS GM and MzGM Highlights

14

• LCP support for GDPS Metro in MzGM configuration – virtual isolation active in the current application region

• RESTful API for standard or common functions mainly (not direct replication management)

• GDPS XRC High Availability. (RFEs 101702, 80312)

• HyperSwap support for XRC secondaries

• 2 K-sys and dual Master support

• Redirection of SNA comms for IR

• XRC recovery of devices in an alternate subchannel set

• HMT support

• Region switch RTO enhancements

• STOP SESSION DRAINCLIP to avoid overhead of XRECOVER processing in MzGM 4-site

• Role-Based Security enhancements – can use SECURITY=SAF in the GDPS Metro context in MzGM



© Copyright IBM Corporation 2020 Accelerate with IBM Storage15

• Role-based security enhancements for standard actions (SPE)

• Improved system monitoring

• RESTful API support


• RAS improvements

• Zero Data Loss at distance

• ROUTING SWITCH for VSAM workloads (SPE)

GDPS Continuous Availability Highlights



GDPS Continuous Availability Highlights – ZDL at distance

16

Logs

CDDS

Active Workload

Logs

CDDS

MM – RL2ZDL Leg (Partial)

MM – RL1

Sysplex A

RS1

RS2

Db2

Intermediate Site

Logs

CDDS

RS3

Global Mirror Logs

CDDSOtherData

ZDL Replication design : • Db2 Logs are replicated thru MM & GM• Data is replicated by IIDR for Db2

Proxy images (B#1 & B#2)

Production images

Sysplex B

Logs

CDDS

HW Repl.

SW Repl.

Logs

CDDS

FlashCopy

Proxy Db2

Standby Workload

Db2Capture Apply

GMSEC GMjournal

OtherData

OtherData

IFI MQ

Region A Region B



GDPS SPEs planned

17

• GDPS Security Improvements

• LCP phase 1

• GDPS Standard Actions security rollout to GDPS CA

• GDPS Main Menu security via SAF

• GDPS LCP Manager

• LCP Manager GM phase 1 (4.2 SPE roll up)

• LCP Manager GM phase 2 (FCSet support)

• Enhanced error handling

• Automatic handling of extent pool and backup volume exhaustion events

• LCP Capture enhancements

• MGM 4-site region switch enhancements

• RESTful API extension to other solutions

• GM/MGM

• GDPS Health Checks

• Dynamic Data Space usage for CANZLOG

• Channel recovery path setting

• CFRM message-based manager role check

• GDPS Metro Global – XRC region switch RTO enhancement

• Parallel processing of CopyOnce data movers



GDPS Workflow Enhancements

18



GDPS Workflow Enhancements

19

• Script changes:

• Ability to start a script at any statement in the script

• Ability to inject a STOP at the next statement request

• Scripts that have been STOPped or have failed in execution are highlighted in the selection list

• Can clear this condition by re-executing the script or using a reset option

• You cannot refresh the scripts when there are failed script indicators present

• Available in all GDPS solutions supporting scripts

• Does NOT enable the ability to cancel the currently executing statement

• Could lead to resources being left in an indeterminate/bad state



LCP Enhancements

20



LCP Delivery / Evolution timeline

21

LCP RESTOREVersion 4.2

Version 4.2* SPE/4.3/4.3 SPE

Up to 10FC & 1RC

Version 4.1 Initial Release

LCP RECOVER

Management profiles

Physical isolation with GM

SGC support

Version 4.3 timeframe

Additionaltopology support

Security extensions

Additionalenhancements

* PH17926 – MM basePH17927 – GM base (not in 4.3 GA)

+ other APARs to resolve some PEs



Virtual and physical isolation of protection copies - recap

Metro Mirror

Protection copies

Restore

Production Systems

Recovery system

SAN / WAN

Administrators

✓ The protection copies are created in one or more storage systems in the existing high availability and disaster recovery topology

✓ The storage systems are typically in the same SAN or IP network as the production environment

Metro Mirror

Protection copies

Production Systems

Recovery system

SAN / WAN

Administrators Administrators

SAN / WAN

Physical isolation

✓ Additional storage systems are used for the protection copies

✓ The storage systems are typically not on the same SAN or IP network as the production environment

✓ The storage systems have restricted access and even different administrators to provide separation of duties

Restore

Virtual isolation

22



LCP Topologies supported

23

POC-ready (not fully tested)

– MGM3SITE with Virtual Isolation

– MZGM3SITE with Virtual Isolation (Metro only)

– MGM3SITE with Physical Isolation

Generally available

– MM2SITE with Virtual Isolation

– MM3SITE with Virtual Isolation

– MGM4SITE with Physical Isolation

– MZGM4SITE with Virtual Isolation (Metro only –Application region)

– GM2SITE with Virtual Isolation (4.2SPE/4.3SPE)

– MM2SITE with Physical Isolation (4.2SPE/4.3SPE)

Key: Metro-based LCP MgrGM-based LCP Mgr



LCP Manager functions (4.2 and 4.3 with SPEs)

24

Common function regardless of topology:

• Support for Safe Guarded Copy in DS8K

• Management profile support to define characteristics such as:

• Retention period• Minimum interval between captures• Capture type• Name – used in script statements• Max Reservation and Check in times

• Ability to tag which capture within a profile will be the target of a script action

• Ability to remove and add devices to the configuration without losing critical information

• Script statements to perform the following• Capture a point in time copy• Recover a point in time copy• Release expired copies• Terminate the recovery of point in time copy

Function specific to a GDPS Metro code base LCP Manager:

• FlashCopy set support• Will be added to GM code base LCP Manager

• Script statement to restore a captured FlashCopy set to the source devices.



GDPS Metro – Virtual air gap

25

RecoverySysplex

RS1 RS2

Metro Mirror

ProdSysplexes

RS2CS1

RS2CS2

RS2CS3

RS2RC1

KP

FC-only



GDPS MGM 4-site – Physical air gap w. TestCopy Mgr

26

RecoverySysplex

RS1 RS4

Glo

ba

l C

op

y

Me

tro M

irror

RS2 RS3Global Mirror

RS5Global Copy

KLCP

RS5CS1

RS5CS2

RS5CS3

RS5RC1

RS6

FC-only



GDPS Global – GM – Virtual airgap

27

RecoverySysplex

RS1 RS2

Global Mirror

ProdSystems

RS2CS1

RS2CS2

RS2CS3

RS2RC1

Kr

RS2J

Logical Corruption Protection Environment in same box as GM secondaries



GDPS Metro (MM2SITE) – Physical airgap

28

Logical Corruption Protection Environment physically isolated in Global Mirror secondary site – can be from RS1 or RS2 but needs to be MT capable

RS3CS1

RS3CS2

RS3CS3

RecoverySysplex

RS3RC1

RS1 RS2Metro Mirror

ProdSysplex

ProdSysplex

RS3

RS3J3

Kr



GDPS Metro Dual Leg (MM3SITE) – Physical airgap

29

RS4 RS4CS1

RS4CS2

RS4CS3

RecoverySysplex

RS4RC1

Kg/Kr LCP

Global Mirror

RS1 RS2Metro Mirror

ProdSysplex

ProdSysplex

RS3

RS4J



GDPS Metro Global 3-site – Physical airgap

30

Logical Corruption Protection Environment physically isolated in Global Mirror secondary site – managed by an external LCP manager (MM) similar to 4-site.

RS4 RS4CS1

RS4CS2

RS4CS3

RecoverySysplex

RS4RC1

KLCP

Global Copy

RS1 RS2Metro Mirror

ProdSysplex

ProdSysplex

RS3

RS3J3

Kr

FC-only



GDPS MGM 3-site virtual airgap

31

Logical Corruption Protection Environment physically isolated in Global Mirror secondary site – can be from RS1 or RS2 but needs to be MT capable. Based on the internal LCP Manager (GM)

RS3CS1

RS3CS2

RS3CS3

RecoverySysplex

RS3RC1

RS1 RS2

Metro Mirror

ProdSysplex

ProdSysplex

RS3

RS3J3

Kr

IR



GDPS MGM 3-site virtual airgap

32

Logical Corruption Protection Environment physically isolated in Global Mirror secondary site – can be from RS1 or RS2 but needs to be MT capable. Based on the internal LCP Manager (GM)

RS3CS1

RS3CS2

RS3CS3

RecoverySysplex

RS3RC1

RS1 RS2

Metro Mirror

ProdSysplex

ProdSysplex

RS3

RS3J3

Kr

IR



GDPS Global - GM – Physical airgap

33

Logical Corruption Protection Environment physically isolated in Global Mirror secondary site managed by external LCP manager (MM)

RS1 RS2Global Mirror

ProdSystems

Kr

RS2J

RS3 RS3CS1

RS3CS2

RS3CS3

RecoverySysplex

RS3RC1

Global Copy

KLCP



GDPS PMT Replacement

34



PMT is back!

35

• New PMT V5.1.0 is GDPS V4 only and will be made available for 4.1, 4.2 (PH21769) and 4.3

• Shipped as part of GDPS code distribution as compiled REXX – no source provided

• Issues and questions can be submitted via GDPS support cases

• Partly integrated with GDPS DASD Config process

• Main function remains the simplification of the process to add or delete device pairs from the GDPS Metro configuration and minimize mirroring/HyperSwap NOK

• Initial support for add/delete of pairs in MM2SITE plus GDPS Metro in MGM3SITE, MGM4SITE, MZGM3SITE and MZGM4SITE topologies for the CKD consistency group only

• Support for changes to FBA group, changes in multiple groups within a consistency group and the MM3SITE topology are also planned

• DataMigrationMode=YES is not (currently) supported.

• Prior versions of PMT can still be used for this purpose in a non-MT set up.



GDPS Configuration Wizard

36



GDPS Configuration Wizard

37

• Objective

• Simplify the configuration of GDPS

• Deliverable

• Tool to aid in the creation and maintenance of the various GDPS XML files for Metro, GM and MGM

• GEOGROUP

• GDPS OPTIONS

• SCRIPT definition

• GEOPARM

• Key values

• Syntax validation

• Auto-completion assistance

• Live documentation

• Launched via GUI

• Automatically if GEOGROUP is not valid

• Button in the GUI if GEOGROUP is good

• Can work with files on z/OS or workstation



Configuration wizard – GEOGROUP option

38



Configuration wizard – GEOGROUP syntax check

39



Configuration wizard – OPTIONS Live documentation

40



Health Check Updates

41



New GDPS Health Checks – z/OS Proxy related

42

• Health Checks have been extended to run on the z/OS Proxy-managed systems

• Most GDPS Metro Health Checks are carried forward onto the z/OS Proxy-managed systems

• Some new aspects to the checks, specific to running in this environment

• CDS checks changed

• PPT check

• STC checks modified for GEOCTCAM, GEOPFENF & GEOPFSRV

• CRITICALPAGING set for IOSHSRDR and IOSHSADR too

• GRS check, CTC check …and more besides

• Managed via SDSF CK option since GDPS NetView not running on z/OS Proxy-managed systems

• A summary of the checks and exceptions are available on the Master K-sys via the Remote option

• GDPS_Check_CONFIG has been updated on the K-sys to check that the recommendations of at least 2 CTC connections and on at least 2 different CHPIDs have been defined and are available.



GUI and RESTful API

43



GDPS GUI/RESTful API changes

44

• GDPSIVP command has been enhanced to further aid in setting up the GDPS GUI

• More information on the failing component is provided with context based additional help

• RESTful API provided for GDPS CA (2.2 SPE)

• Common functions with Metro

• Many CA-specific functions such as Workload info, Latency info, ZDL status, Replication status, Switch status, Change Master function, Controller info and more…..

• RESTful API provided for GDPS Global – XRC environments

• Common functions with Metro

• Some limited XRC-specific functions

• Retrieve info from GEOXPARM

• XRC Global Status – mirroring status of all the XRC sessions defined, config time, GDPS Mode and a few more things



Questions

45



Additional Information

46

• Web sites:

• GDPS https://www.ibm.com/it-infrastructure/z/technologies/gdps

• IBM Z https://www.ibm.com/it-infrastructure/z

• IBM Z Resiliency https://www.ibm.com/it-infrastructure/z/capabilities/resiliency

• Storage https://www.ibm.com/it-infrastructure/storage

• Redbook – GDPS Family: An Introduction to Concepts and Capabilities

http://www.redbooks.ibm.com/abstracts/sg246374.html?Open

• GDPS Web site resources

• GDPS: The Enterprise Continuous Availability / Disaster Recovery Solution white paper

• GDPS pre-requisite information

• GDPS training schedule

• GDPS hardware qualification letters

• e-mail: [email protected]

https://www.ibm.com/it-infrastructure/z/technologies/gdps

https://www.ibm.com/it-infrastructure/z

https://www.ibm.com/it-infrastructure/z/capabilities/resiliency

https://www.ibm.com/it-infrastructure/storage

http://www.redbooks.ibm.com/abstracts/sg246374.html?Open

mailto:[email protected]

Documents

Accelerate with IBM Storage: GDPS V4.3 and SPEs: What’s New? WSC...GDPS Global XRC 122 12% GDPS Global GM 174 16% GDPS Continuous Availability (AA) 7 1% 981 delta2019 total GDPS