AMCC 9550SX 2 Manual - Page 13

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AMCC 9550SX 2 Manual

Putting the Pieces Together

Advanced 3ware RAID Features and Performance Architecture
StorSwitch
maximizes controller throughput — StorSwitch is a unique non-blocking switch
™
fabric architecture that allows 3ware controllers to concurrently communicate to all attached SATA
drives through a pool of 32 direct memory access (DMA) channels for unparalleled performance
and data availability. The result is superior overall system performance compared to non-scalable
hub-based systems that share the bandwidth of a single DMA channel.
StorSave optimizes data protection and performance — StorSaves's revolutionary combination
of powerful reliability enhancements and a battery backup unit (BBU) maximize data protection
and system reliability without sacrificing controller performance. StorSave permits 3ware controllers
to use both controller cache and disk cache during SATA RAID operations. This strengthens array
performance during optimal usage, as well as during degraded RAID 5 operations which means
faster rebuild times. StorSave Profiles allow user-specified levels of protection vs. performance
(9650SE, 9590SE and 9550SXU only).
StreamFusion maximizes application performance under multiple loads — An intelligent
cache algorithm dynamically optimizes RAID 5 and RAID 6 disk accesses and efficiently manages
data through controller cache for guaranteed bandwidth. As the number of data streams increases,
the total bandwidth is divided equally among them. Application performance will not suffer
during heavy traffic or when multiple applications are accessing data simultaneously. 3ware RAID
controllers are not the performance bottleneck, as is often the case with software RAID and
other hardware RAID controllers.
Host Data
Disk #1
Disk #2
Disk #3
Disk #4
Disk #5
P1 Parity
Q1 Parity
Block 1
Block 2
Block 3
Block 4
P2 Parity
Q2 Parity
Block 5
Block 6
Block 7
Block 8
P3 Parity
Q3 Parity
Block 9
Block 10
Block 11
Block 12
P4 Parity
Q4 Parity
Striped Data with Distributed Double Parity — RAID 6
RAID 0 "Striping"
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
ETC. . .
StreamFusion Performance
vs. Competition
120
100
StreamFusion in Action
RAID 5 "Rotational Parity"
80
60
A 0
B 0
C 0
40
A1
B1
1 Parity
20
A2
C2
2 Parity
0
3 Parity
B3
C3
1
2
4
8
# Streams
StreamFusion assures scalable high performance
Iometer 2004.07.30dual Xeon 2.6 Ghz/1GB system/WinXP SP2/HDS7222525VLSA80/fw
V36OA60A/64KB stripes/RAID 5/all other settings at default
• Protects drive and controller cached writes in the event of a power loss
• Uses controller and drive write cache in all modes
RAID 1 "Mirroring"
• Dual caching for faster rebuild times
A
A
1
Stripe
StreamFusion Performance vs. Competition
B
=
B
1
120
C
C
1
D
1
100
D
StreamFusion in Action
80
60
40
20
0
1
2
4
8
# Streams
StreamFusion assures scalable high performance
Iometer 2004.07.30dual Xeon 2.6 Ghz/1GB system/WinXP SP2/HDS7222525VLSA80/fw
V36OA60A/64KB stripes/RAID 5/all other settings at default
Hard
Drive
Up to
1.5 Gb/sec
Hard
per port
Drive
Hard
Drive
Hard
Drive
Advanced
StorSwitch
Architecture
3ware SATA Hardware
RAID Controller
AMCC
Competition 1
0
Parity
Competition 2
D1
D2
I/O
D3
16
SATA Disk
I/O
SATA Disk
I/O
SATA Disk
I/O
SATA Disk
RAID 10 "Striped Mirror"
Mirror
D1
D1
1
Drive 0
Drive 1
D2
D2
1
Drive 2
Drive 3
AMCC
Competition 1
Competition 2
16
6