IBM AIX Continuous Availability Features - IBM Redbooks

More documents

Recommendations

Info

2.3.7 Minidump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2.3.8 Trace (system trace) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2.3.9 Component Trace facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 2.3.10 Lightweight Memory Trace (LMT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2.3.11 ProbeVue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2.3.12 Error logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 2.3.13 The alog facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 2.3.14 syslog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 2.3.15 Concurrent AIX Update. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 2.3.16 Core file control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 2.4 Network tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 2.4.1 Virtual IP address support (VIPA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 2.4.2 Multipath IP routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 2.4.3 Dead gateway detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 2.4.4 EtherChannel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 2.4.5 IEEE 802.3ad Link Aggregation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 2.4.6 2-Port Adapter-based Ethernet failover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 2.4.7 Shared Ethernet failover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 2.5 Storage tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 2.5.1 Hot swap disks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 2.5.2 System backup (mksysb) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 2.5.3 Alternate disk installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 2.5.4 The multibos utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 2.5.5 Network Installation Manager (NIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 2.5.6 Logical Volume Manager-related options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 2.5.7 Geographic Logical Volume Manager. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 2.5.8 Journaled File System-related options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 2.5.9 AIX storage device driver-related options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 2.6 System and performance monitoring and tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 2.6.1 Electronic Service Agent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 2.6.2 Other tools for monitoring a system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 2.6.3 The topas command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 2.6.4 Dynamic kernel tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 2.7 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 2.8 AIX mobility features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 2.8.1 Live partition mobility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 2.8.2 Live application mobility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Chapter 3. AIX advanced continuous availability tools and features. . . . . . . . . . . . . . 55 3.1 AIX Reliability, Availability, and Serviceability component hierarchy . . . . . . . . . . . . . . 56 3.1.1 First Failure Data Capture feature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 3.2 Lightweight memory trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 3.2.1 LMT implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 3.3 The snap command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 3.4 Minidump facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 3.4.1 Minidump formatter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 3.5 Live dump and component dump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 3.5.1 Dump-aware components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 3.5.2 Performing a live dump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 3.6 Concurrent AIX Update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 3.6.1 Concurrent AIX Update terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 3.6.2 Concurrent AIX Update commands and SMIT menus . . . . . . . . . . . . . . . . . . . . . 72 iv IBM AIX Continuous Availability Features
3.7 Storage protection keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 3.7.1 Storage protection keys overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 3.7.2 System management support for storage keys. . . . . . . . . . . . . . . . . . . . . . . . . . . 79 3.7.3 Kernel mode protection keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 3.7.4 Degrees of storage key protection and porting considerations. . . . . . . . . . . . . . . 84 3.7.5 Protection gates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 3.7.6 Example using kernel keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 3.7.7 User mode protection keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 3.7.8 Kernel debugger commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 3.7.9 Storage keys performance impact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 3.8 ProbeVue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 3.8.1 ProbeVue terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 3.8.2 Vue programming language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 3.8.3 The probevue command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 3.8.4 The probevctrl command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 3.8.5 Vue overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 3.8.6 ProbeVue dynamic tracing example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 3.8.7 Other considerations for ProbeVue. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 3.9 Xmalloc debug enhancements in AIX V6.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 3.9.1 New features in xmalloc debug. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 3.9.2 Enabling/disabling xmalloc RTEC and displaying current value . . . . . . . . . . . . . 126 3.9.3 Run-time error checking (RTEC) levels for XMDBG (alloc.xmdbg) . . . . . . . . . . 127 3.9.4 XMDBG tunables affected by error check level . . . . . . . . . . . . . . . . . . . . . . . . . 131 3.9.5 XMDBG tunables not affected by error check level . . . . . . . . . . . . . . . . . . . . . . 134 3.9.6 KDB commands for XMDBG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 3.9.7 Heap registration for individual debug control. . . . . . . . . . . . . . . . . . . . . . . . . . . 137 Appendix A. AIX features availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Abbreviations and acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 Related publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 IBM Redbooks publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Other publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Online resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 How to get IBM Redbooks publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Help from IBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 Contents v
Page 1: Front cover IBM AIX Continuous Avai
Page 4 and 5: Note: Before using this information
Page 8 and 9: vi IBM AIX Continuous Availability
Page 10 and 11: Trademarks The following terms are
Page 12 and 13: Engineering degree in Computer Scie
Page 14 and 15: Find out more about the residency p
Page 16 and 17: 1.1 Overview In May 2007, IBM intro
Page 18 and 19: 1.5 Continuous operations Continuou
Page 20 and 21: 1.6.2 Availability 1.6.3 Serviceabi
Page 22 and 23: IBM has tried to enhance FFDC featu
Page 24 and 25: 10 IBM AIX Continuous Availability
Page 26 and 27: 2.1 System availability AIX is buil
Page 28 and 29: On AIX 5.3, the only way to persist
Page 30 and 31: When used on a standalone server (s
Page 32 and 33: mirrored volume group on the client
Page 34 and 35: 2.2.1 Error checking Run-Time Error
Page 36 and 37: The PowerPC hardware gives software
Page 38 and 39: System dumps can also be user-initi
Page 40 and 41: Live dumps are small dumps that do
Page 42 and 43: Trace is a valuable tool for observ
Page 44 and 45: Component Trace uses mechanisms sim
Page 46 and 47: 2.3.14 syslog To display the boot l
Page 48 and 49: Logging can be added to many of the
Page 50 and 51: compression: on path specification:
Page 52 and 53: 2.4.4 EtherChannel network traffic
Page 54 and 55: 2.4.6 2-Port Adapter-based Ethernet
Page 56 and 57:
operations) without affecting produ
Page 58 and 59:
Quorum A quorum is a vote of the nu
Page 60 and 61:
2.5.8 Journaled File System-related
Page 62 and 63:
Fast I/O failure is controlled by a
Page 64 and 65:
display its output in a format suit
Page 66 and 67:
For more detailed information about
Page 68 and 69:
54 IBM AIX Continuous Availability
Page 70 and 71:
3.1 AIX Reliability, Availability,
Page 72 and 73:
This means that traditional AIX sys
Page 74 and 75:
used by IBM service personnel, so t
Page 76 and 77:
also be used to obtain a snapshot o
Page 78 and 79:
3.5 Live dump and component dump Li
Page 80 and 81:
lfs filesystem ._0 | NO | ON/3 | OF
Page 82 and 83:
.vmker | YES | ON/3 | OFF/3 .vmpool
Page 84 and 85:
The output of Start a Live Dump is
Page 86 and 87:
Table 3-3 Concurrent update termino
Page 88 and 89:
We tested the installation of an ef
Page 90 and 91:
Setting efix state to: STABLE +----
Page 92 and 93:
mode, storage keys are called user
Page 94 and 95:
Example 3-19 shows the SMIT menu fo
Page 96 and 97:
might share a given hardware key. M
Page 98 and 99:
KKEY_UPUBLIC, KKEY_FILE_DATA KKEY_U
Page 100 and 101:
Note: Kernel keys and keysets, whic
Page 102 and 103:
extension key-aware is determining
Page 104 and 105:
added a protection gate for the int
Page 106 and 107:
} printf("hardware keyset after KER
Page 108 and 109:
} param=atoi(*(argv+1)); printf("Te
Page 110 and 111:
Load the kernel extension so that a
Page 112 and 113:
3 : 000000000000000A r4 : F10006C00
Page 114 and 115:
3.7.7 User mode protection keys Use
Page 116 and 117:
► The APIs provided by the system
Page 118 and 119:
if (!strcmp(*(argv+1),"read")){ if
Page 120 and 121:
strlen() at 0xd010da00 _doprnt(??,
Page 122 and 123:
int pthread_attr_setukeyset_np (pth
Page 124 and 125:
Machine State Save Area iar : 00000
Page 126 and 127:
As a consequence, determining the r
Page 128 and 129:
A Vue script or Vue program is a pr
Page 130 and 131:
► An optional predicate The predi
Page 132 and 133:
3. Interval probe manager The inter
Page 134 and 135:
{ int count; count = count +1; prin
Page 136 and 137:
► Errno names ► Signal names
Page 138 and 139:
* will result in error out of read(
Page 140 and 141:
This places a large part of the bur
Page 142 and 143:
Note: The frequency of checks made
Page 144 and 145:
Non-fragments 00000066 Promotions 0
Page 146 and 147:
immediately after the returned stor
Page 148 and 149:
This option should be used with car
Page 150 and 151:
3.9.6 KDB commands for XMDBG ► xm
Page 152 and 153:
Page 154 and 155:
Name AIX version Hardware required
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Online resources These Web sites ar
Page 162 and 163:
sysdumpdev 27 tprof 28 trace 28 trc
Page 164:
subsequent reboot 71, 133 SUE 18 Sy
show all

IBM AIX Continuous Availability Features - IBM Redbooks

Create successful ePaper yourself

Delete template?

Save as template?