IBM Systems

© 2009 IBM Corporation

IBM Systems Storage DS8700

IBM Systems

Summary - DS8700 (2-way/4 way base frame)242x model 941

I/O Drawers (slightly larger at 5U)

4GB features only (no 2GB/ no ESCON)

Drawers attached via PCI-E switch

New Host Attachment and

Device Adapter features (PCI-E)

Batteries

Power Supplies

P6 (POWER 6) Servers

Feature specified 2-way(#4301)/4-way(#4302)

2-way processor memory size 32GB-128GB

4-way processor memory size 32GB-384GB

4-way required for expansion frame models

HMC – new laptop

Familiar Layout

IBM Systems

DS8700 (4-Way with two expansion frames, Rear view)

�Non-disruptive MES of

first expansion frame

�Capable of being

extended to 5 frames

�Expansion frame with

IO drawers must be

model 94E

�Expansion Frames

without IO drawers can

be either 94E/92E

�Use models 931/932 if

Thin Provisioning or

Remote Pair FlashCopy

is required

941 Base94E/92E Position 2 (#0341) 94E Position 1 (#0340)

IBM Systems

�Hardware changes from

DS8100/DS8300 to the DS8700► IBM Power6-based controller

► PCI Express (PCIe) internal fabric

► New PCIe IO Drawer

► Updated Device Adapter

► Increased cache and NVS size

Agenda

IBM Systems

High Bandwidth, Fault Tolerant InterconnectHigh Bandwidth, Fault Tolerant Interconnect

DS8000 Topology – All Models

SANSAN

Persistent memory

Volatile memoryN-way

SMP

Persistent memory

Volatile memory N-waySMP

RAID

Adapters

RAID

Adapters

Host

Adapters

Host

AdaptersHost

AdaptersHost

AdaptersHost

AdaptersHost

Adapters

Host1Host2 Host3

IBM Systems

DS8300 Architecture Host

…

…

4-way P5 570 2.2GHz

Memory DIMMs

Memory DIMMs

P5

L3 Cache

Memory DIMMs

Memory DIMMs

P5

L3 Cache

4-way P5 570 2.2GHz

Memory DIMMs

Memory DIMMsP5

L3 Cache

Memory DIMMs

Memory DIMMs

P5

L3 Cache

= Updated in DS8700

Server/CPU:

Power5+ IO Fabric:

RIO

IBM Systems

DS8700 Architecture Host

…

…

2/4-way P6 570 4.7Ghz

Memory DIMMs

Memory DIMMs

P6L3 Cache

Memory DIMMs

Memory DIMMs

P6

L3 Cache

2/4-way P6 570 4.7Ghz

Memory DIMMs

Memory DIMMsP6

L3 Cache

Memory DIMMs

Memory DIMMs

P6

L3 Cache

Power6

processor PCIe point to point

connections

PCIe IO

Drawer

IBM Systems

Hardware Changes in the DS8700

Front Rear

v

P6 Servers4.7Ghz 2/4-way

New PCIe IO Host Bay

Advanced Gen2 PCIeHigh Bandwidth IO Fabric

Point to point cables

PCIe Bridged AdaptersNew adapter processor

IBM Systems

Advanced PCIe Internal Component Interconnect

� Performance► Bi-directional, full duplex, low latency

► Symmetrical access to data -> no performance skew

� Reliability: ► Bit error auto-correction with CRC detection

� Industry standard with 800 members in PCIe Special

Interest Group (SIG)

� Millions of lines of firmware support in existence

PCI Express is a interconnect technology designed to

provide universal connectivity for use as a chip-to-chip and chip to adapter card interconnect.

IBM Systems

DS8700 Improvements - Cluster

�Power6 Processor► 4.7 GHz P6 570 CECs

● 941 2-way

– Up to 128 drives

♦ Base rack

● 941 4-way

– Up to 1024 drives

♦ Base rack plus up to 4 expansion frames (94E)

♦ First expansion rack contains additional IO enclosures

�All expansion frames can be added concurrently

�Concurrent upgrade from 2-way to 4-way system

IBM Systems

DS8700 Improvements - Cluster

� Power6 Processor

► 4.7 GHz P6 570 CECs

● 941 2-way

– Up to 128 drives

♦ Base rack

● 941 4-way

– Up to 1024 drives

♦ Base rack plus up to 4 expansion frames (94E)

♦ First expansion rack contains additional IO enclosures

� All expansion frames can be added concurrently

� Concurrent upgrade from 2-way to 4-way system

� Dedicated Ethernet Adapters for TPC-R no longer required / available

IBM Systems

DS8700 Improvements – Device Adapter

�Replace 750FX (0.5 GHz) processor

with the 750GX (1 GHz) processor

�Upgrade to PCIe interface for point-

to-point connection

�Why it matters► Throughput enhancement from PCIe upgrade

► Better performance in IOPS-sensitive workloads

● Enables better utilization of SSD drives

IBM Systems

DS8700 Improvements – Cache and NVS

�Cache options► 941 2-way

● 32GB to 128GB

► 941 4-way

● 32GB to 384GB

�NVS Sizes

(static – based

on cache size)► 1GB – 12GB

1GB32GB

12GB384GB

8GB256GB

4GB128GB

2GB64GB

NVS SizeCache

Size

IBM Systems

DS8700 - Model Reduction from 5 to 2 Non-DisruptiveUpgrade Path

�2 models: 1 A frame (941) and 1 B frame (94E)

�2-way base with 1st I/O tower pair feature standard

�Enables lower entry price by not requiring 2nd I/O tower pair

�2-way – up to 128 drives in base frame

�Add 2nd I/O tower pair feature (can be field added non-disruptively)

�4-way = 2-way base + processor card feature + 2nd I/O tower pair feature

�4-way + 1st expansion frame added concurrently

� 4-way + 1st expansion frame. Add expansion frames to 1024 drives

IBM Systems

DS8700 – Improving on DS8000

� Increase in performance

► Sequential and IOPs vs DS8300

� Improved flexibility

► Additional concurrent hardware upgrade capability

� Simplify and improved DS8000 design

► Simplified adapter card packaging, smaller cables

� Maintain quality of latest generation DS8000

►Minimize changes to higher level code

► Carry forward the same parts and their locations

� Bring forward features and advanced function in DS8000

► Built from DS8000 R4.2 code base

► Remote mirror and copy functions are interoperable

IBM Systems

DS8000 Family Summary

323216Host Adapter Slots

12812864Max Host Adapter Ports

FCPFCPFCPPPRC Fabric

2 TB2 TB2 TBMax LUN Size

Add / DelAdd / DelAdd / DelDynamic Provisioning

32-384GB / 1-12GB32-284GB / 1-8GB16-128GB / 1-4GBCache / NVS

P6 4.7GHz 2 or 4-wayP5 2.2GHz 4-wayP5 2.2GHz 2-wayProcessor

4 Gb FC x 4 portsESCON x 2 ports

4 Gb FC x 4 ports

ESCON x 2 ports

4 Gb FC x 4 ports

Host Adapters

16168DA Slots

512512512Max Logical Paths / CU

2K2K2KMax Process Logins

510510510Max N-Port Logins/Port

64K total64K total64K totalMax Number of LUNs / CKD volumes

717.6 TB717.6 TB173 TBMax Capacity w/450GB DDM

239.2 TB239.2 TB56 TBMax Capacity w/146GB DDM

RAID 5, 6, 10RAID 5, 6, 10RAID 5, 6, 10RAID Types

73, 146 GB73, 146 GB73, 146 GBSSD DDM Types

1 TB1 TB1 TBSATA DDM Types

146, 300, 450 GB146, 300, 450 GB146, 300, 450 GBFC DDM Types

FC-ALFC-ALFC-ALDDM Interface

16-102416-102416-384DDMs

DS8700DS8300DS8100