Index_D

D

Data

collaboration, 184

damage, 83–84

messaging, 184

partitioning, 157–59

planning, 157–59

protection, 210–11

restoring, 158

verification, 180

Database engine

DBA, 75–77

transaction commitment, 77

at work, 74–77

Database files, 58–60

list of, 58–59

optimal placement of, 278–79

property store, 59

streaming store, 59–60

Databases

copying, 125, 132–33

defragmentation of, 172

logical corruption, 104–5

multiple, laying out, 186

physical corruption, 98–100

Data-collection points, 363–65

Exchange server, 364–65

server subsystem, 363–64

Data replication

asynchronous, 222

Exchange and, 223, 225–27

hardware-based, 222

software-based, 223–24

synchronous, 222

technologies, 222–25

vendor survey, 225

Data Replication Manager (DRM), 223

Decision/action point, 38

Demilitarized Zone (DMZ), 331

Denial of service (DoS), 298–99

forms, 299

viral replication, 299

Differential backups, 118–19

defined, 116

incremental backups vs., 118

restoring, 116

strategy, 170

See also Backups

Digital encryption, 348

Digital signatures, 302

Disaster recovery, 135–53

best practices, 155–86, 379

capability, 166

challenge, 146

clusters, 294–96

Exchange recovery servers, 146–50

growth's impact on, 184–86

LANs, 295

management, 177–84

plan development, 174–77

RSG, leveraging, 150–53

SLAs, 159–61

snap/clone technology, 136–38

successful management, 182

technology, 379

technology selection, 161–67

toolkit, 177, 178

VSS, 138–41

VSS support, 141–45

DLT

arrays, 173

drives, 165

Domain controller (DC), 96

Domain groups, 307–8

Domain Name Service (DNS), 109

Double Data Rate (DDR) SDRAM, 193

Downtime, 27–50, 378

anatomy, understanding, 35–42

black box, 35–42, 378

cause assessment, 42–47

clustering solution, 274

decision/action point, 38

Exchange and Domino comparison, 31

failure point, 37

hardware failures and, 15

hours, 28–29

impact on end-user basis, 34

issue resolution, 274

lost client opportunity, 29–30

measurement, 28–30

normal operational point, 40–41

notification point, 37–38

postrecovery action point, 39–40

prefailure errors, 36–37

recovery action point, 38–39

reliability and, 12

root causes, 15

as series of components, 41

server, 28–29

Downtime causes, 42–47

assessing, 42–47

categories, 42–43

environment, 45–47

hardware, 44–45

operator, 45

root, 15

software, 43–44

Downtime cost, 7–8, 27, 30–35

CNI study, 31, 32, 33, 34

determining, 30

illustrated, 33

study, 32

Dynamic Buffer Allocation (DBA), 75–77, 264

design goals, 76

server resource use, 76