D/RIP network, 195, 241, 288
daemons, 10
for resource ownership, 126–127
respawning, 138
starting, 15–21
data center example, 359–360
clients in, 362–363
cluster node manager in, 361–362
clusters in, 360–361
final product, 367–368
highly available database servers in, 365–366
highly available serial devices in, 364–365
NAS server in, 363–364
data synchronization, 69–70
data tiers in N-Tier applications, 361
database servers
highly available, 365–366
in N-Tier applications, 361
deadtime entry, 135, 161
debugging mode for Mon package, 309–310
default chain policies, 38
default routes and gateways
for Heartbeat, 150–151
for LVS-DR real server, 235–236
for LVS-NAT clusters, 219–220
for routing, 44–46
for SystemImager, 102
Denial of Service (DoS) attacks, 244, 248
dependencies, 387–388
dynamic executables and shared objects, 388–389
failures in, 391–392
rpm package shared libraries, 390–391
SystemImager server software, 98
Yum for, 392–393
design goals for high-availability cluster, 256–257
destination hashing scheduling methods, 202
destination hosts, matching packets to, 45–47
/dev/ttyS0 file, 173
/dev/watchdog file, 177–178
devices, Stonith. See Stonith (shoot the other node in the head)
df command, 63, 99, 313
DHCP servers, 101–103
diff command, 30, 344
diffie-hellman-group1-sha1 key exchange process, 74
DIP (director's IP) addresses, 195
direct I/O in NFS, 296
direct routing, 198–200, 235
Directors
connection tracking table for, 242–243
Heartbeat installation on, 263
for LVS
configuration, 221–224
installation, 220
redundant, 255–256
as real servers, 227–229
Director's IP (DIP) addresses, 195
disaster recovery, 364
discretionary locking, 280
diskless workstations, 362
distributed content, 157
Distributed Lock Manager (DLM) project, 396
distributed objects, 3, 361
distribution kernels, 55
distribution vendors, 57
DLM (Distributed Lock Manager) project, 396
dmesg command, 59
DNS (Domain Name System)
with Apache, 401, 405
with cluster node manager, 362
for iptables and ipchains, 41
monitoring, 321
reverse queries in, 404
round-robin, 155–157
DocumentRoot entry, 398
DoS (Denial of Service) attacks, 244, 248
dotlock arbitration, 286
dotlock files, 281
downloading
FTP for, 369–371
Lynx for, 371–372
Perl modules, 264–266, 306
wget for, 372–373
DRBD filesystem, 395
dynamic executables, shared objects for, 388–390
dynamic HTML, 367
dynamic scheduling methods, 203–207