index_D

D

DAFS (Direct Access File System), 124, 493

data

access to. See data access

availability of. See availability

business application. See business application data

encryption, 425, 428430

hetero-data, 278

mirroring, 30, 174, 376

non-volatile, 66

organization model. See data organizational model

organizing, 115128, 285286

ownership of, 360

protection of, 7374, 174

recovery of. See recovery

sharing, 241, 244246

size of, 22, 4546, 6061

storage of. See data storage

striping, 376

temporary storage, 499

utilization of, 361

volatile, 6667

data access

business application data, 3031

challenges, 316, 2223

database systems, 125127

NAS, 4445

SANs, 60

servers, 16

storage networks and, 1819, 2223

See also user access

data blocks, 146

data centers

acquisition strategies, 417418

backup services, 368369, 380382

capacity planning, 401419

data availability, 368

data recovery, 369, 379382

division of responsibilities within, 402403

help desks, 399

problem management, 396400

SAN connectivity, 254262

services, 368369, 371

storage capacity, 370

storage problems within, 396400

data language compiler functions, 126

data mart applications, 471

data marts

described, 308, 492493

vs. data warehouses, 308

data organizational method (DOM), 282

data organizational model

data warehouse workloads, 309

departmental workloads, 325

I/O workloads, 285290

OLTP workloads, 300301

specialized workloads, 329330

web-based workloads, 305

WIT workloads, 327

data paths

data warehouse workloads, 310

departmental workloads, 325

described, 282

I/O workloads, 289290

OLTP workloads, 302, 310

specialized workloads, 330

web-based workloads, 306

WIT workloads, 328329

data protection workloads, 74

data replication, 262263, 369

data services, 368369, 371

data storage

application design, 416

architectures, 6576

challenges, 316

client/server. See client/server storage

elements of, 6670

hierarchy, 6870

Metro Data Areas, 21

need for, 4

Network Attached Storage. See NAS

online. See web-based storage

problems, 16

Storage Area Networks. See SANs

web-based. See web-based storage

See also storage systems

data warehouse applications, 1213, 471

data warehouse transactions, 308310

data warehouse workloads

applying SAN to, 308311

configurations, 310311

data organizational model, 309

data paths, 310

SANs, 256

data warehouses

data size and, 6061, 308

described, 308, 493

OLTP workloads, 308311

RDBMS technology and, 130132

SANs, 6061

vs. data marts, 308

data width, 97

database management systems (DBMS), 116

database manager functions, 126

database schema, 127

database servers, 1112

database systems

abstraction, 125126

access, 125127

components of, 126127

considerations, 127128

overview, 125128

performance, 117

databases

business application design, 56

challenges, 127128

concurrent factor, 302

data warehouse, 130

described, 116

embedded. See embedded databases

hierarchical data model, 127

network data model, 127

OLTP, 60

physical design of, 286

relational. See RDBMS

size of, 22

Static Database Model, 173

Very Large Databases, 51

data-centric applications, 12, 5051

data-centric workloads, 256

DBMS (database management systems), 116

departmental architecture, 139140, 319, 324326

departmental workloads, 324326

deposit application, 281284

DES algorithm, 445

device drivers. See drivers

devices, 7794

block, 146

controllers, 8384

disk systems. See disk systems

drivers. See drivers

Firewire connections, 110111

hardware failures, 357359

host adapters, 8182

magnetic disk storage, 8485

NAS. See NAS devices

peripheral connectivity, 7881

SAN. See SAN devices

SCSI, 103105

sharing, 242244

USB connections, 110111

differential bus, 101

Digital Linear Tape (DLT) format, 92, 493

Direct Access File System (DAFS), 124, 493

Direct Memory Access (DMA), 69, 124

director devices, 493

directories, 165167

director-level enterprise, 216

disaster recovery, 363364, 369

See also recovery

disk arrays, 8586, 210

disk cache, 78

disk drives , 15, 8485

disk systems, 8590

disks

capacity, 85

compression, 493

data storage and, 70

described, 70

fragmentation, 494

magnetic disk storage, 8485

partitions, 286

physical vs. logical locations, 8283

technical specifications, 85

virtual, 85

Distributed Desktop Management Task Force (DMTF) standard, 413

DLT (Digital Linear Tape) format, 92, 493

DMA (Direct Memory Access), 69, 124

DMTF (Distributed Desktop Management Task Force)standard, 413

DOM (data organizational method), 282

DP (data paths), 282

drivers

device I/O, 146

HBA, 208209, 240241, 441

host adapters, 81

RAID and, 241

SANs, 239241

software, 239241

switch OS, 239241

drives

disk, 15, 8485

tape, 9092

DVD media, 94, 267

DW (data warehouse) transactions, 308310