14.1.3 571B

iV5R4 offers two new options on DASD configuration.

yRAID6 which offers improved system protection on supported IOAs.

yNOTE: RAID6 is supported under iV5R3 but we have chosen to look at performance data on a iV5R4 system.

yIOPLess operation on supported IOAs.

14.1.3.1 571B RAID5 vs RAID6 - 10 15K 35GB DASD

 

 

 

 

 

 

 

RAID-5 vs RAID-6 .

 

 

 

Time

 

 

 

571B RAID-5

571B RAID-6

 

 

 

0.25

 

 

 

 

 

 

 

0.2

 

 

 

 

 

 

 

Responce

 

 

 

 

 

 

 

0.15

 

 

 

 

 

 

 

(sec)0.1

 

 

 

 

 

 

 

System

0.05

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

0

500

1000

1500

2000

2500

3000

3500

 

 

 

 

 

Workload Throughput

 

 

 

14.1.3.2 571B IOP vs IOPLESS - 10 15K 35GB DASD

The system CPU % used with and without and IOP was basically the same for the 571B with our workload tests.

 

 

 

 

 

IOP vs IOPLess

 

 

 

 

 

 

 

571B RAID-5 IOP

571B RAID-5 IOPLess

 

 

Time

 

0.25

 

 

 

 

 

 

 

 

0.2

 

 

 

 

 

 

 

Responce

 

 

 

 

 

 

 

 

(sec)

0.15

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

System

 

0.05

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

0

500

1000

1500

2000

2500

3000

3500

 

 

 

 

 

Workload Throughput

 

 

 

IBM i 6.1 Performance Capabilities Reference - January/April/October 2008

 

 

 

 

© Copyright IBM Corp. 2008

Chapter 14 DASD Performance

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Image 194
Intel 7xx Servers, 170 Servers, AS/400 RISC Server manual 14.1.3 571B, 14.1.3.1 571B RAID5 vs RAID6 10 15K 35GB Dasd