Index_H

H

hardware and system tuning and optimization

for WebSphere-based platforms, 271 “277

hardware clustered solution

architecture and function of, 295 “298

hardware clustering

available for LDAP environments, 345

primary forms of, 295

service availability provided by, 294 “298

hardware upgrade

pilot application costs associated with, 16 “17

hash_area_size parameter

for Oracle system configuration and tuning, 437

HBAs (Host Bus Adaptors). See Host Bus Adaptors (HBAs)

heap

defined, 158

high availability

horizontal clustering for in WebSphere, 307

methods for achieving WebSphere platform, 293 “307

recap of topologies suitable for, 307

WebSphere clustering for, 307

high availability and failover fundamentals

in WebSphere, 292 “293

High Availability Cluster Multiprocessing (HACMP)

clustering solution, 295

as solution for applications using NFS, 349

high CPU utilization of JVM

determining cause of poor performance of, 498

high load average

drilling down to, 476 “478

high-availability database server topologies, 218 “223

architectural considerations and best practices for, 219 “223

high-availability extension

example of for multiple JVMs with multiapplication servers, 215

high-performance WebSphere applications

developing, 395 “410

horizontal and vertical scaling

advantages of combined, 153 “154

horizontal clustering

for high availability in WebSphere, 307

horizontal scaling

example of with WebSphere, 151

vs. vertical scaling, 152 “153

with WebSphere, 150 “152

Host Bus Adaptors (HBAs)

adding to upgrade system performance, 10

hot disaster recovery sites

typical configuration and function of, 300 “301

hot disk

picking with the iostat command, 487 “488

Hot Standby Routing Protocol (HSRP)

by Cisco, 353

hot-standby databases

database availability options, 306

function of, 219 “220

HPjmeter profiler

function of, 511 “513

specifications, 513

user interface, 512

Web site address for downloading, 511

HSRP. See Hot Standby Routing Protocol (HSRP)

HTTP plug-in

function of, 54 “58

HTTP plug-in configuration file

code example for declaring the ConnectTimeout setting and value, 322 “323

code for mapping to WebSphere 4 dual instance Web container configurations, 314 “315

code for mapping to WebSphere 5 dual instance Web container configurations, 315 “316

default virtual host section of, 56 “57

example of in WebSphere, 54 “56

noncontext configuration section of, 56

Route directive section in, 57 “58

ServerGroup directives in, 58

UriGroup directive declaration section of, 57

HTTP plug-in directive

for setting ConnectTime, 332 “333

for setting RetryInterval, 331 “332

HTTP plug-in topology

example in WebSphere, 55

HTTP server

function of with WebSphere, 53 “54

third-party HTTP server platforms, 54

HTTP server clustering, 294

HTTP servers/Web server tier

in a WebSphere high availability environment, 303 “304

HTTP sessions

importance of invaliding when they aren't required, 398 “399

HTTP Web server

WebSphere queue settings, 285

HTTP Web server plug-in

code example of a WebSphere 4 configuration file, 311 “312

code example of a WebSphere 5 configuration file, 312

function of, 311 “329

Hypertext Markup Language (HTML)

Web container processing of static content from, 59 “60

HyperTransport bus

incorporated in the AthIon 64, 89