Intel 170 Servers 196, 199, 200, 202, 203, 205, New in iV5R4M5 206, 207, 208, New in iV6R1M0 209

14.1.3.1 571B RAID5 vs RAID6 - 10 15K 35GB DASD	195
14.1.3.2 571B IOP vs IOPLESS - 10 15K 35GB DASD	195
14.1.4 571B, 5709, 573D, 5703, 2780 IOA Comparison Chart	196

14.1.5Comparing Current 2780/574F with the new 571E/574F and 571F/575B NOTE: iV5R3 has support for the features in this section but all of our performance measurements were done on iV5R4 systems. For information on the

supported features see the IBM Product Announcement Letters. . . . . . . . . . . . . . . . . . . . . . . . . . . 198

14.1.6 Comparing 571E/574F and 571F/575B IOP and IOPLess				199
14.1.7 Comparing 571E/574F and 571F/575B RAID5 and RAID6 and Mirroring				200
14.1.8 Performance Limits on the 571F/575B				202
14.1.9 Investigating 571E/574F and 571F/575B IOA, Bus and HSL limitations				203
14.1.10 Direct Attach 571E/574F and 571F/575B Observations				205
14.2 New in iV5R4M5			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	206
14.2.1 9406-MMA CEC vs 9406-570 CEC DASD				206
14.2.2 RAID Hot Spare			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	207
14.2.3 12X Loop Testing			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	208
14.3 New in iV6R1M0			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	209
14.3.1 Encrypted ASP			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	209
14.3.2 57B8/57B7 IOA			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	211
14.3.3 572A IOA			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	213
14.4 SAN - Storage Area Network (External)				214
14.5.1 General VIOS Considerations .			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	216
14.5.1.1 Generic Concepts			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	216
14.5.1.2 Generic Configuration Concepts				217
14.5.1.3 Specific VIOS Configuration Recommendations -- Traditional (non-blade)
Machines . .	. . . . . . . . . . . . . . . . . . . . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	220
14.5.1.3 VIOS and JS12 Express and JS22 Express Considerations				222
14.5.1.3.1		BladeCenter H JS22 Express running IBM i operating system/VIOS		222
14.5.1.3.2		BladeCenter S and JS12 Express		227
14.5.1.3.3		JS12 Express and JS22 Express Configuration Considerations		228
14.5.1.3.4 DS3000/DS4000 Storage Subsystem Performance Tips				229
14.6 IBM i operating system 5.4 Virtual SCSI Performance				231
14.6.1 Introduction			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	233
14.6.2 Virtual SCSI Performance Examples				234
14.6.2.1	Native vs. Virtual Performance			235
14.6.2.2	Virtual SCSI Bandwidth-Multiple Network Storage Spaces			235
14.6.2.3	Virtual SCSI Bandwidth-Network Storage Description (NWSD) Scaling			236
14.6.2.4	Virtual SCSI Bandwidth-Disk Scaling			237
14.6.3 Sizing		. . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	238
14.6.3.1	Sizing when using Dedicated Processors			238
14.6.3.2	Sizing when using Micro-Partitioning			240
14.6.3.3	Sizing memory		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	241
14.6.4 AIX Virtual IO Client Performance Guide				242
14.6.5 Performance Observations and Tips				242
14.6.6 Summary			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	242
Chapter 15. Save/Restore Performance				243
15.1 Supported Backup Device Rates			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	243
15.2 Save Command Parameters that Affect Performance				244
Use Optimum Block Size (USEOPTBLK)				244
Data Compression (DTACPR) . . .			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	244
Data Compaction (COMPACT) . .			. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	244
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008			IBM i Performance Capabilities	6