P

packages for kernel compilation, 54

packets and packet routing, 33–34

for clusters, 187

default chain policies, 38

ip for, 50

iptables and ipchains, 39, 252–253

kernel for, 44–50

with load balancer, 240–241, 244–246

marked, 239, 250–253

matching, 45–47

Netfilter for, 34–38

Panasas filesystem, 396

partitioned clusters, 113–114

passive FTP, 41

passwords in authentication, 343–345

patch command, 30, 344

patching kernel, 56–57

path names for links, 403

paths in Heartbeat, 112–114

PCCs (persistent client connections), 249

pcmcia script, 26

perceptions of NFS performance, 288–290

performance

cluster node, 189–191

Ganglia for. See Ganglia software package

gmetric for, 338–340

NAS, 295

NFS, 288–290, 388

Perl modules

for ldirectord, 263–266

for SystemImager, 97–98

persistence

in LVS, 247–253

connection templates for, 247

connection types for, 248–249

Netfilter Marked Packets, 250–253

PCC, 249

port affinity, 250

PPC, 249–250

LVS without, 246–247

persistent client connections (PCCs), 249

persistent connection templates, 247–248

persistent port connections (PPCs), 249–250

PHP for Ganglia, 329

physical paths in Heartbeat, 112–114

pidof program, 126

PIDs (process identifiers)

determining, 126

with locks, 287–288

ping command and packets

for ICMP, 223, 385

for NICs, 384–385

ping entry for ipfail, 176

pipes in NFS performance, 288

Plone clusters, 342, 351

points of failure. See No Single Point of Failure (NSPoF)

Polyserve filesystem, 396

port affinity, 250

Port entry, 399

portmap script, 26

Posix fcntl system, 282–283

Posix kernel lock arbitration, 285

POST_ROUTING hook, 240–241

power control, Stonith for. See Stonith (shoot the other node in the head)

PPCs (persistent port connections), 249–250

pppoe script, 26

PRE_ROUTING hook, 240–241

prepareclient command, 99, 108

presentation tiers, 361

preventative maintenance, rebooting nodes for, 352–353

primary Directors

Heartbeat installation on, 263

LVS, 255–256

primary IP addresses, 116

primary names in linuxconf, 382

primary servers in Heartbeat, 112

configuration, 131

in haresources file, 148

launching Heartbeat on, 140–142

log files on, 143–144

standby mode for, 160

primaryserver entry, 171

print job management, 346–347

on central print servers, 350

on cluster nodes, 351

print servers, 5

custom scripts on, 351

/etc/printcap on, 349–350

LPRng installation on, 347–348

print job management on, 350

print spoolers, fault-tolerant, 345

cluster nodes in, 345–347

/etc/printcap file for, 349–350

/etc/printcap.local file for, 348–349

job ordering in, 345–346

LPRng for, 346–348

print jobs in, 346–347, 350–351

printing systems for clusters, 190

private encryption keys, 72

/proc/cpuinfo file, 59

/proc/ksyms file, 61

/proc/locks file, 286

/proc/net/ip_vs_lblcr file, 207

/proc/net/route file, 149

/proc/net/rpc/nfs file, 339

/proc/sys/net/ipv4/conf/all/arp_announce file, 262

/proc/sys/net/ipv4

/conf/all/arp_ignore file, 262

/proc/sys/net/ipv4/conf/lo/arp_announce file, 262

/proc/sys/net/ipv4/conf/lo/arp_ignore file, 262

/proc/sys/net/ipv4/ip_forward file, 45, 49–50, 221

/proc/sys/net/ipv4/vs/expire_nodest_conn file, 268

/proc/sys/net/ipv4/vs/secure_tcp file, 244

process identifiers (PIDs)

determining, 126

with locks, 287–288

processes, 10

procinfo utility, 335

products in Zope, 367

prompt, cluster node examinations from, 337–338

protocol entry, 271

proxy servers, 206–207

public encryption keys

copying, 81–82

in SSH, 72

purchasing cluster nodes, 190–192

PuTTY client, 367

pxe script, 26

Python programs, 367