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IBM TotalStorage DS8000 in a z/OS Environment (Session 3080)
Rosemary McCutchenStorage Systems Advanced Technical Support
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Topics
DS8000 Enhancements
DS8000 Logical Configuration
z/OS Software Support
z/OS HCD Considerations
Advanced Functions
Performance Monitoring
Benefits
References
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DS8000 Enhancements
HMC
73GB, 146GB, 300GB switchedbunch of disk (SBOD) disk drives(up to 640)
pSeries Power5
4-port FC/FICON Host Adaptercards (up to 128 ports)
Device Adapters scale withcapacity
64K devices; 255 Logical ControlUnits per logical DS8000 (FICON)
Smaller footprint
Two logical DS8000s in onephysical DS8000 (9A2 LPAR)
Metro and Global Mirrorcompatibility with ESS and DS6000
Base Frame Expansion Frame
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DS8000 Physical Overview
DS8100921
(Base Frame Only)
DS8100921
+Expansion Frame
DS8300922 or 9A2
(Base Frame Only )
DS8300922 or 9A2
+Expansion Frame
DS8300922 or 9A2
+ 2Expansion Frames
Processor- pSeries Power5
2-way1.5GHz
2-way1.5GHz
4-way1.9GHz
4-way1.9GHz
4-way1.9GHz
Cache up to 256GB 16 to 128 GB 16 to 128 GB 32 to 256 GB 32 to 256 GB 32 to 256 GB
Expansion Rack Yes (1) -- Yes (1 or 2) -- --
Host Adapters up to 128 ports- per HA: 4-port FC / FICON (2 Gb)- per HA: 2-port ESCON
2 to 16(e.g., 8 to 64 FC /FICON ports)
2 to 16 2 to 16 2 to 32 2 to 32
Device Adapter Pairs 1 to 4 1 to 4 1 to 4 1 to 8 1 to 8
Drives up to 640 disks- 73 GB (15K rpm)- 146 GB (10K rpm)- 300 GB (10K rpm)
16 to 128
(Increments of 16)
16 to 384
(increments of 16)
16 to 128
(Increments of 16)
16 to 384
(increments of 16)
16 to 640
(Increments of 16)
Physical Capacity up to 186 TB 1.1 to 37.2 TB 1.1 to 111.6 TB 1.1 to 37.2 TB 1.1 to 111.6 TB 1.1 to 186.3 TB
Power Three-Phase Three-Phase Three-phase Three-Phase Three-phase
Dimensions
- Height x Width x Depth- Footprint
76 x 33.25 x 43 in9.93 sq. ft.
76 x 66.5 x 43 in19.86 sq. ft.
76 x 33.25 x 43 in9.93 sq. ft.
76 x 66.5 x 43 in19.86 sq. ft.
76 x 99.75 x 43 in29.79 sq. ft.
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DS8000 Performance Enhancers
Memory DIMMs
Memory DIMMs
P5L3 Cache
Memory DIMMs
Memory DIMMs
P5L3 Cache
Host
2-way/4-way P5 570 Server 2-way/4-way P5 570 Server
RIO-G Loop
2Gb FC-AL linksSwitched FC-AL Disk Packs
RIO-GInterconnect
4-port FC/FICONHost Adapters
Switched Bunch ofDisks (SBOD) Back-end
POWER5
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ESS 800 Arrays and Device Adapters
DA Pair 1
DA Pair 2
DA Pair 3
DA Pair 4
DA Pair 1
DA Pair 2
DA Pair 3
DA Pair 4
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DS8100 Disks and Device Adapters (DAs)
8 arrays (64 disks) on DA0
DA Pair 0
Up to 4 DA pairsDA pairs 0 to 32 DA pairs (DA0 and DA2)used for disks in full base frame4 DA pairs used for full base frameand full expansion frame
Up to 16 Host AdaptersUp to 64 host ports
Server0 and Server1
b
0/1 1/0
3/22/3
220
0
331
1
220
0
S0
S1
HMC
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DS8300 Disks and Device Adapters (DAs)Up to 8 DA pairs
DA pairs 0 to 7
2 DA pairs for disks infull base frame6 DA pairs for disks infull A+B frames
8 DA pairs for disks infull A+B + half full Cframe
Up to 32 Host AdaptersUp to 128 FICON/FCPhost ports
64 ports in base frame
64 ports in expansionframe
b b
0/1 1/0
3/22/3
220
0
664
4
775
5
331
1
220
0
4/5 5/4
7/66/7
C0
C1S0
S1
HMC
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DS8300 2107-9A2 LPAR Dual Storage Images
I/O Drawer RIO 1
I/O Drawer RIO 1
CEC 1
CEC 0
StorageEnclosure
Storage
Enclosure
StorageEnclosure
StorageEnclosure
I/O Drawer RIO 0
I/O Drawer RIO 0
StorageEnclosure
I/O Drawer RIO 1
I/O Drawer RIO 1
StorageEnclosure
StorageEnclosure
StorageEnclosure
StorageEnclosure
Storage
Enclosure
StorageEnclosure
StorageEnclosure
I/O Drawer RIO 0
I/O Drawer RIO 0
StorageEnclosure
StorageEnclosure
Empty StorageEnclosure Image2
Empty StorageEnclosure Image2
StorageEnclosure
Storage
Enclosure
StorageEnclosure
StorageEnclosure
StorageImage 2
StorageImage 2
StorageImage 1
StorageImage 1
Image 1 LPAR BImage 2 LPAR A
Current implementation is 2 Storage Images (logical DS8000s)
50% of total processors, cache, I/O enclosures (device adapters and hostadapter slots) and disk enclosures dedicated to each image
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DS8000 Enhanced Addressing & Connectivity
ESS 800 DS8000 DS8000 w/LPAR
Max Logical Subsystems 32 255
64K
64K
64K
5098K
2K
512
256
510
Max Logical Devices 8K 128K
Max Logical CKD Devices 4K 128K
Max Logical FB Devices 4K 128K
Max N-Port Logins/Port 128 509Max N-Port Logins 512 16K
Max Logical Paths/FICON Port 256 2K
Max Logical Paths/CU Image 256 512
Max Path Groups/CU Image 128 256
Ad d T h i l S A i
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DS8000 Array Site
Logical grouping of disksSame capacity and speed 73 GB 15k rpm 146 GB 10k rpm 146 GB 15k rpm
300 GB 10k rpm
Created and assigned to DA pair bysoftware during installation
DS8000 arraysite8 disks (DDMs)
DS8000 array site
Ad d T h i l S t A i
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DS8000 Array and RankRAID type and storage type now defined in separatesteps
Array defines RAID type (RAID5 or RAID10)RANK defines storage type (CKD or FB)
RAID arrayOne DS8000 array site becomes one arrayRAID5 6+P, 7+P
RAID10 3+3, 4+4Parity is striped across all disks in array butconsumes capacity equivalent to one disk
RANKOne DS8000 array becomes one rankCKD or FBDivided into extents
3390 Mod1 (1113 cylinders/.94GB)
DS8000 array site
D DD D
D DD P
DS8000 array(RAID5 7+P)
D DD D
D DD P
DS8000 Rank(RAID5 7+P) CKD
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ESS 800 Diskgroups and Logical Control Units
DA1/LCU0,8
DA2/LCU2,A
DA3/LCU4,C
DA4/LCU6,E
DA1/LCU1,9
DA2/LCU3,B
DA3/LCU5,D
DA4/LCU7,F
Even LCUs Odd LCUs
Unlike ESS diskgroups, DS8000 ranks have no pre-determined or fixed relation toServer0/Server1 or Logical Control Units (LCUs)
DS8000 ranks are associated with Server0/Server1 when assigned to an extent poolDS8000 extent pools (and ranks) are associated with LCUs when volumes are created
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ESS LCU Capacities / DDM and Device
LVS 32,760 Cylinder 3390
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DS8000 Flexible LCU Assignment
3 options:
1. One LCU per rankSimplifies management
2. Multiple LCUs on one rankProvides additional addressesfor rankAllows utilization of largedrives with small device types
3. One LCU across multiple ranksEnables cross-rank CopyServices consistency groupThis will be the default formultiple-rank extent pools
Server1
Ranks/Pools
Server0
Ranks/Pools
LCU 01LCU 00
13 15 17 1912 14 16 18
2A
2A 2B
2B
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DS8000 Logical Control Units and Address Groups
Similar to ESS:LCU has a maximum of 256 addresses
Aliases (Parallel Access Volumes/PAVs) are shared within an LCULCU is the basis for Copy Services paths and consistency groups
Even-numbered LCUs are associated with Server0 and odd-numberedLCUs are associated with Server1
New:LCU does not have a pre-determined relationship to rank/DA pair
Up to 255 LCUs are available
Set of 16 Logical Subsystems (LSSs) is called an Address Group LSS 00-0F, 10-1F, 20-2F, 30-3F, etc. Storage type for entire Address Group (16 LSSs) is set to CKD or Fixed
Block by the first LSS defined
ESCON devices must be in Address Group 0 (LCU 00-0F)
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DS8000 Extent Pool
Logical grouping of one or more ranks which havebeen divided into extents from which volumes will becreated
1. User creates extent poolSpecifies extent pool storage type (CKD or FB)
Assigns extent pool to Server0 or Server1
2. User assigns one or more ranks to the extent poolRank becomes associated with Server0 or Server1
3. User creates LCUs
4. User creates volume from extents in one extent poolEven LCUs will be available for volumes in Server0extent poolsOdd LCUs will be available for volumes in Server1extent pools
Extent Pool P0Assigned to Server0
Even LCUs available
Rank R0
2 A 1 0
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Extent Pool P0Assigned to Server0
Even LCUs available
DS8000 Volumes
Rank R0
2 A 1 0Single volume is created from extents on onerank if possible
Single volume may spill across ranks in poolor may be larger than the size of a single rank
Volumes may be dynamically deleted andextents reused
Rank R2
Rank R0
2 A 1 0
2 A 1 1
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DS8000 VolumesRank R0
2 A 1 02 A 1 1
In single-rank extent pool, multiplevolumes will be createdsequentially on the rank
In a multiple-rank extent pool,current implementation placesmultiple volumes on rank withmost free extents
Volumes may be dynamicallydeleted and extents reused Rank R2
Rank R0
2 A 1 0
2 A 1 1
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DS8000 Volume ID
User specifies 4-digit hex volume ID which includes
address group, LCU and device ID:
Even LCUs are available for Server0 extent pools
Odd LCUs are available for Server1 extent pools
Example: Volume ID x2A102=Address Group 2 (group of 16 LCUs 20-2F)
2A=LCU 2A
2A is even- may only be used with Server0 pools10=device ID
User may choose volume IDs to match z/OS device IDs
Extent Pool P0Assigned to Server0
Even LCUs available
Rank R0
2 A 1 0
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DS8000 Configuration Planning Considerations
One extent pool per rank is a good starting pointBalance extent pools and ranks across Server0 and Server1
One LCU per rank is a good starting point
Unless more addresses are needed
Use a limited number of device types for ease of management
Use custom volumes that are even multiple of 1113 cylinder extents3390M33390M930051 cylinders60102 cylinders
Use dynamic Parallel Access Volumes (PAVs) if possibleESS users may use the same PAV ratios as for ESSDefine as many PAVs as you can afford
New DS8000 addressing capability may require zSeries device number andSSID planning
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DS8000 zSeries/Count Key Data Support Host Attach
zSeries supports both CKD and FB volumes (FB for zSeries Linux)
FB volumes are FCP attached, CKD volumes are FICON attached
CKD also supported by ESCON Host Attachment Feature
Same 2GB 4 port FC Host Attachment Feature supports either FCP or FICON
Assigned at the Port level (FCP or FICON, single port cant be both)
FICON Fastload new method for Adapter Code Load
FICON FASTLOAD used for FICON attachCompatible with FCP Fastload Allows intermix use of ports on HA
Architected event, no long busy used (yes)
Loss of Light less than 1.5 seconds for Adapter Code Load (only when Adapter Code isupgraded)
Control Unit Initiated Reconfiguration (CUIR) still used with ESCON features
Concurrent Code Load Support
Advise all host attachments have (at least) two ports Preferred on two separate Host Adapters
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DS8000 Storage Manager
Easy-to-use, powerful and flexible User InterfaceWizards, Filters, Sorts, Hyperlinks, Animation, Copy/Paste
Includes optional automated methods
Runs on DS8000 integrated HMC; accessed via Browser
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DS8000 Command Line Interface (DSCLI)
Powerful tool for automating configuration tasks andcollecting configuration information
Can be used in conjunction with PDF
Same DSCLI for DS6000 and for ESS 800 Copy Services
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DS8000 z/OS Software Support
z/OS 1.4 and higher
Device support facility (ICKDSF) Release 17
DFSORT
Data Facilities Storage Management Subsystem (DFSMS) SPE
Resource Management Facility (RMF) SPE APAR OA06476, PTF UA90079, UA90080
DS8000 supported as 2105 without DFSMS and z/OS SPEinstalled (PTFs still need to be applied for 2107 toleration)
DEVSERV QDASD and DEVSERV PATHS show device type2107
Check the 2107device PSP bucket for maintenance required
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DS8000 z/OS HCD Considerations
New device support for D/T2107
DS8000 supports up to 16Address Groups
65,280 total logical volumes
For IOCP and HCD, the CUaddresses are hex 00 FE
LCU / LSS do not have to becontiguous
ESCON addressing onlysupported on Address Group 0(LCU 00-0F, 4K logical volumes)
If running in 2105 mode, do nothave extended addressing
Address Group 2 (LCU 20-2F)
CNTLUNIT CUNUMBR=A000,PATH=(52,53,54,55),
UNITADD=((00,256)),LINK=(24,34,25,35),
CUADD=20,UNIT=2107,DESC='N150 LCU20'
CNTLUNIT CUNUMBR=A100,PATH=(52,53,54,55),
UNITADD=((00,256)),LINK=(24,34,25,35),CUADD=21,UNIT=2107,DESC='N150 LCU21
CNTLUNIT CUNUMBR=A200,PATH=(52,53,54,55),
UNITADD=((00,256)),LINK=(24,34,25,35),
CUADD=22,UNIT=2107,DESC='N150 LCU22'
Examples provided at: http://w3-03.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/TD102127
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DS8000 z/OS HCD ConsiderationsMultiple Subchannel Sets Relief for 64K Devices per LPAR
Information provided in:z/OS V1R7.0 HCD Planning (GA22-7525-09)
Z9 processor/ zOS 1.7 onlyLPAR definition can contain SubchannelSets 0 & 1
256 Channels in eachHCD Implementation
No changes to LSS definition in ESS,DS6000, DS8000
Aliases can be moved to Set 1 in HCDRequires additional cabling toDirector/Storage System
Duplicate Addresses Possible
Providing they are in separateSubchannel Sets ...No Problem
Flexible LSS structure
Changed QPAVS display:
DS QPAVS,E278,VOLUME
IEE459I 09.57.53 DEVSERV QPAVS 046
HOST SUBSYSTEM
CONFIGURATION CONFIGURATION
-------------- --------------------UNIT UNIT UA
NUM. UA TYPE STATUS SSID ADDR. TYPE
----- -- ---- ------ ---- ---- ------------
0E278 78 BASE 3205 78 BASE
1E279 79 ALIAS-E278 3205 79 ALIAS-78
1E27A 7A ALIAS-E278 3205 7A ALIAS-780E27B 7B ALIAS-E278 3205 7B ALIAS-78
0E27C 7C ALIAS-E278 3205 7C ALIAS-78
0E27D 7D ALIAS-E278 3205 7D ALIAS-78
1E27E 7E ALIAS-E278 3205 7E ALIAS-78
1E27F 7F ALIAS-E278 3205 7F ALIAS-78
**** 8 DEVICE(S) MET THE SELECTION CRITERIA
0
1LPAR
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DS8000 Advanced Functions
Parallel Access VolumesShared within an LCU
Same considerations as ESS
Copy Services
Similar to ESSNew with DS8000:
New command line interface (DSCLI) provides enhanced support 9A2 (LPAR) Storage Images (Point in Time Copy within 1 image)
TSO commands and ANTRQST support for Global Mirror Exploitation of Parallel Access Volumes (PAVs) on secondary
devices for Remote Mirror for z/OS (APAR OA09238) PPRC links are FCP only (no ESCON PPRC support)
No Metro/Global Copy
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IBM TotalStorage Resiliency Family
FlashCopy internal replication Flashcopy V2 FunctionalityRemote Mirroring external replication PPRC V2 Functionality
Metro Mirror (Synchronous protocol, remote site data currency, metro distance,consistency groups)
Global Mir ror (Asynchronous protocol, remote site near-data currency, unlimiteddistance, consistency groups)
Global Cop y (Asynchronous protocol, period point-in-time currency, unlimited
distance)Metro/Glob al Mirror (3-site with A-to-B synchronous + B-to-C asynchronous -SOD)
Two site: AB------C - periodic copy from A to B, unlimited distance
Three site: A---B---------------C - current data at B is forwarded to C
z/OS Glob al Mirro r (optimized for z/OS, asynchronous protocol, remote site near-data currency, unlimited distance - XRC)
Metro /zOS Globa l Mi r ro r (three site solution using Metro Mirror + zSeries GlobalMirror)
Core Data Repl icat ion Tech no log ies fo r DS8000 and DS6000
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DS8000 Performance Monitoring
New counters reported in RMFOA06476 APAR must be installed for RMF
Cache reports
Link statistics
Extent Pool statistics
Rank statistics
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RMF Cache Reports
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RMF Link Statistics
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RMF Extent Pool Statistics
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DS8000 Rank Statistics also available for FB Ranks
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DS8000 Benefits
More capacityMore host portsMore performance
More LCUsFlexible LCU alignment with ranks
Ability to maintain small volumes on ranks of large DDMs
Ability to create application-based LCUs and consistency groups
Larger volumesDynamic volume deletionUser-specified volume IDs
Enhanced command line interfaceCopy Services compatibility with ESS and DS6000
Dual Storage Images in a single physical storage unit
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DS8000 ReferencesIBM TotalStorage DS8000 Series: Concepts and
ArchitectureSG24-6452
IBM TotalStorage DS8000 Series: Implementation SG24-6786
IBM TotalStorage DS8000 Series: Copy Services with IBMeServer zSeries
SG24-6787
IBM TotalStorage DS8000 Series: Copy Services in OpenEnvironments
SG24-6788
IBM TotalStorage DS8000 Introduction and Planning Guide GC35-0495
IBM TotalStorage DS8000 Installation Guide SY27-7641
IBM TotalStorage DS8000 Users Guide SC26-7623
IBM TotalStorage DS8000 Host Systems Attachment Guide SC26-7628
Multipath Subsystem Device Driver Users Guide SC30-4096
z/OS V1R7.0 HCD Planning GA22-7525
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Trademarks
The following terms are trademarks of International Business Machines Corporation in the UnitedStates, other countries or both.
AS/400, DS6000, DS8000, DS Storage Manager, Enterprise Storage Server, FICON, FlashCopy,
GDPS, IBM, iSeries, pSeries, RS/6000 , RMF, IBM TotalStorage, VM/ESA, VSE/ESA, xSeries, z/OS,zSeries, z/VM, On Demand Business
Intel and Pentium are trademarks of Intel Corporation in the United States, other countries, or both.
Microsoft, Windows and Windows NT are trademarks of Microsoft Corporation in the United States,other countries, or both .
Other company, product, or service names may be trademarks or service marks of others.
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Disclaimer
Copyright 2004 by International Business Machines Corporation.
No part of this document may be reproduced or transmitted in any form without written permission from IBM Corporation.
Product data has been reviewed for accuracy as of the date of initial publication. Product data is subject to change without notice. Thisinformation could include technical inaccuracies or typographical errors. IBM may make improvements and/or changes in the product(s)
and/or programs(s) at any time without notice. Any statements regarding IBM's future direction and intent are subject to change orwithdrawal without notice, and represent goals and objectives only.
References in this document to IBM products, programs, or services does not imply that IBM intends to make such such products,programs or services available in all countries in which IBM operates or does business. Any reference to an IBM Program Product in thisdocument is not intended to state or imply that only that program product may be used. Any functionally equivalent program, that doesnot infringe IBM's intellectually property rights, may be used instead. It is the user's responsibility to evaluate and verify the operation ofany on-IBM product, program or service.
THE INFORMATION PROVIDED IN THIS DOCUMENT IS DISTRIBUTED "AS IS" WITHOUT ANY WARRANTY, EITHER EXPRESS OR IMPLIED.IBM EXPRESSLY DISCLAIMS ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE ORNONINFRINGEMENT. IBM shall have no responsibility to update this information. IBM products are warranted according to the terms andconditions of the agreements (e.g., IBM Customer Agreement, Statement of Limited Warranty, International Program License Agreement,etc.) under which they are provided. IBM is not responsible for the performance or interoperability of any non-IBM products discussedherein.
The provision of the information contained herein is not intended to, and does not, grant any right or license under any IBM patents orcopyrights. Inquiries regarding patent or copyright licenses should be made, in writing, to:
IBM Director of LicensingIBM CorporationNorth Castle DriveArmonk, NY 10504-1785U.S.A.
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Disclaimers cont
The provision of the information contained herein is not intended to, and does not, grant any right or license under anyIBM patents or copyrights. Inquiries regarding patent or copyright licenses should be made, in writing, to:
IBM Director of Licensing
IBM CorporationNorth Castle DriveArmonk, NY 10504-1785U.S.A.
The performance data contained herein was obtained in a controlled, isolated environment. Actual results that may beobtained in other operating environments may vary significantly. While IBM has reviewed each item for accuracy in aspecific situation, there is no guarantee that the same or similar results will be obtained elsewhere.
Customer experiences described herein are based upon information and opinions provided by the customer. The sameresults may not be obtained by every user.