Aucun titre de diapositive

1
GCOS 8 Session
TechSem 2001 Paris, March 28-30
IOSP Benefits Perspective Vincent HababouGCOS
8 Sales Support
2
Acronyms..

• ASD Any Size Disk
• BFR Boot File Replace
• DMM Data Management Migration
• FCP Fibre Channel (SCSI) Protocol
• IOCDS I/O Configuration Data Set
• IOSP I/O Server Processor
• IOSPCDS IOSP Configuration Data Set
• LUN Logical Unit Number
• MALFC ASD Fixed size type device
• RAS Reliability Availability Serviceability
• SAN Storage Area Network
• VMEC Virtual Machine Environment Configuration

3
Callisto 1

• Successful introduction of a new I/O engine for
  CMOS based platforms
• 100 IOSPs installed
• 500 PCI-ESCON channels installed
• Improved I/O throughput
• 18 MB/s PCI-ESCON channels
• Improved connect rate
• I/O capacity over 2000 I/Os per IOSP
• ESCON Boot
• Boot File Replace

4
Callisto 2

• New PCI Fibre Channel connections
• 100 MB/s Fibre Channels for Disk Tape
• FC can coexist with PCI-ESCON in same IOSP
• A step towards SAN integration
• Point to Point and Switched topologies
• Evolution of current IOSP
• Update SP IOSP Software
• Update GCOS Configuration
• Insert new Fibre Channel Adaptors
• New data format for FC channel access
• Powerful migration tool (DMM)
• Better disk space utilization

5
Requirements

• Jupiter 2 and Olympus Systems
• GCOS 8 SR5.1
• No change to GCOS 8 Native I/O
• No change to user applications
• New G8CM versions
• V4 Support for Fibre Channel connections
• V5 Support for PCI ESCON and FC VMF Shared
  Channels
• Hardware Configuration
• Min per IOSP 1 PCI-FC or 2 PCI-ESCON
• Max per IOSP 4 PCI-FC and 11 PCI-ESCON

6
Hardware View
IOSS
IOSS
IOSC
CSS
Up to 11 PCI ESCON
ext
C M U
I O U
I O U
1-4
basic
Up to 4 Fibre Chan.
I O C
I O C
I O C
I O C
C O B
Up to 12...
L C B
C M U
L C B
Up to 11 PCI ESCON
ext
To peripheraldevices
basic
Up to 4 Fibre Chan.
Bulkhead Power
SP1
SP0
7
System Architecture
CPU CPUCPU CPU
CPU CPUCPU CPU
MMU MMU MMU MMU
MMU MMU MMU MMU
CBU
CBU
SCU
IOU
IOU
IOU
IOU
IOB
IOB
LCB
LCB
CSS
IOSP
IOSP
Basic Ext.
Basic Ext.
IOCU
IOCU
LIOP
LIOP
LIOP
IOSS
IOSC
Up to11 ESCONChannels
Up to12 single-boardChannels
Up to12 single-boardChannels
Up to11 ESCONChannels
Up to4 FC Channels
Up to4 FC Channels
8
Fibre Channel Connection

• Fibre Channel protocol is FCP(SCSI over Fibre
  Channel)
• HBA (Host Bus Adaptor) is Emulex LP8000
• Multi-mode optical fiber
• Standard 50m cable. Up to 500m withouta repeater
• Support for Brocade 2800, 16 Port Switch
• Peripherals supported
• CDA 8400/8700 Disk Subsystems
• STK 9840B Tape Subsystems

9
Point to Point Topology
DEDICATED FIBRE
10
Switched Topology
SHARED FIBRE
Zoning Management for Shared Environments
11
System Interface

• No change to GCOS 8 Native I/O
• Conversion to FCP done in Callisto
• Unit to LUN mapping for Disk
• CKD to FBA disk format
• Count Key information eliminated
• No change for Tape
• ESCON written tapes can be read through FC
• Support for FC Boot
• Possible FC only system

12
Unit to LUN mapping

• GCOS 8 disk addressing is at Unit level
• SCSI (FCP) addressing is at LUN level(i.a. UNIX
  Logical Unit Number)
• The LUN size will match the Unit size but the
  data format is different

512W x 4.5 2304
13
Disk Space Organization (36GB)
14
Disk Space Organization (73GB)
15
Configuration Management

• G8CM V3
• ESCON channels (HPIA and PCI-ESCON)
• Performance enhancements
• G8CM V4
• Fibre Channel (IOSP)
• Boot File Replace (IOSP)
• G8CM V5
• PCI ESCON and FC VMF Shared Channels (IOSP)
• Versions 4 and 5 will continue to coexist

16
Configuration Considerations

• Up to 32 LC per physical channel for FC
• G8CM V5 only intended for VMF users with PCI
  ESCON or FC Shared Channels
• The IOCDS file is used to control unshared ESCON
  I/O configurations
• A Full Set IOCDS file (IOSPCDS) is required for
  Fibre Channels and Shared channels
• Used by VMF to validate HOS/GOS configurations
  (ESCON and FC)
• SP Load into IOSP for Fibre Channels
• Used by IOSP for FC control

17
VMF Configuration Components
Hardware Configuration SP (BCF)
HOS Configuration ( CONFIG,FILES)
Virtual System Configuration ( VMEC.CFG )
GOS Configuration( CONFIG)
GOS Configuration( CONFIG)
18
Configuration Considerations (2)

• Single configuration G8CM versions use the
  concept of CCI
• Configuration Component Identifier
• G8CM V5 introduces the concepts of UCI (Universal
  Component Identifier) andCentral System
• The Central System is a collection of VMF HOS/GOS
  configurations
• The UCI is used to uniquely identify a device
  used in more than one configuration
• The VMF VMEC file will be managed and generated
  by G8CM (V5)

19
IOCDS IOSPCDS files
RAS Files(incl. IOCDS)
RAS Files(incl. IOCDS)
VMEC IOSPCDS
IOSPCDS
CDA 8400/8700
20
IOSP Feature Product Set
GCOS 8 VMF G8CM Platform IOSPESCO
N Boot SR5.0 8VM5.4U2 V3 G2 TABoot
FileReplace SR5.1 8VM5.5 V4 TA Fibre
Channels SR5.1 8VM5.5 V4 G2 TA Shared
IOSPChannels SR5.1 8VM5.6 V5 G2
TA(ESCON FC)
G2 Jupiter-2 or DPS9000/7xx-2 TA Olympus or
DPS9000/TAxx
21
IOSP Software Architecture
22
ASD Evolution vs. FC Evolution

• A Disk Subsystem is ASD or Non-ASD
• A Disk Subsystem is ESCON or Fibre Channel
• With larger and larger disk drives, ASD evolution
  becomes inevitable
• Number of Units/Drive per Subsystem
• Number of Logical Devices to manage
• Moving to ASD can be as simple as rebooting with
  MALFC devices but..
• Addressing above issues, only by using variable
  size MALVC devices
• Defining MALVC devices implies data migration
• FC evolution also implies data migration
• These migrations can be done in one or two steps
• DMM can help in both cases

23
Migration Considerations

• ASD evolution while remaining ESCON
• New data migration when moving to FC
• FC Subsystems are ASD only
• Possible simple All MALFC configuration
• Extra disk space benefit
• Migrating to FC is more than channel swap
• A logical copy utility has to be used to move
  data from ESCON S/S to FC S/S
• FMS Save / Restore or FAS
• DMM CLONE directive

24
Migration Considerations (2)

• Disk FC connections use CDA 8400/8700
• CDA 8400/8700 are ESCON and FC
• New 4-port ESCON directors
• Mixed ESCON / FC IOSP channels and CDA Adaptors
  are possible
• In summary the following migration items should
  be considered
• SR5.1
• Disk Subsystem consolidation
• Fibre Channel evolution
• Evolution to ASD

25
Evolution Scenario 1

• Keep ESCON connections
• SR5.1
• Possible Disk S/S consolidation
• May need extra diskspace when going FC later
• Possible ASD evolution
• simple or more elaborate
• Use DMM to ease migration
• Possibly use 4-port ED for connectivity
• A new data migration will be needed to go FC

26
Evolution Scenario 2

• Move to Fibre Channels
• Total or partial
• Possible phased introduction of FC subsystems
• SR5.1
• Disk S/S consolidation on CDA 8400/8700
• ASD Evolution
• Simple or more elaborate (preferred)
• May start with selected applications on test S/S
• Use DMM to ease migration

27
Callisto 2 Benefits

• Performance first
• Higher Connect rate
• Increased Throughput
• Reduced response time
• Increased formatted Disk Capacity
• Up to 23
• A step towards SAN integration
• Availability
• FC Disk FCS - end of April 2001

28

• Questions?