Informix安装指南
1、 使用一个其他用户登陆后，切换到root用户（root用户无法直接登陆）；
2、 创建Informix用户组；
groupadd informix
3、 创建Informix用户，并是其归属informix用户组；
useradd –g informix informix
4、 创建目录/opt/informix，将目录的属主和所属组都改为Informix；
mkdir /opt/informix
chown informix:informix /opt/informix
5、 配置/opt/informix/.cshrc文件，至少包括一下几行：
setenv INFORMIXDIR /opt/informix
setenv INFORMIXSERVER sct_net
setenv ONCONFIG onconfig
setenv PATH ${PATH}:${INFORMIXDIR}/bin:/opt/langtools/bin
6、 打开文件/etc/passwd，将informix用户的登陆路径改为/opt/informix，将Shell改为/bin/csh，保存退出；
7、 将安装包ids.7.31.UD6W5.SOL-26.tar复制到/opt/informix目录下，解包安装；
tar –xvf ids.7.31.UD6W5.SOL-26.tar
./installserver
按照提示输入SER:AAC#J794613 KEY: NNXSKP。
8、 保证root用户的/.profile文件中至少包括一下几行：
INFORMIXDIR=/opt/informix
export INFORMIXDIR
INFORMIXSERVER=sct
export INFORMIXSERVER
ONCONFIG=onconfig
export ONCONFIG
如果没有，添加上重新登陆使之生效。
9、 配置/etc/system文件,修改之前注意备份原有文件为system.bak，以防不测；
配置内容如下（这是一个system文件的副本,其中省略了注释）:
set shmsys:shminfo_shmmax=1073741824
set tune_t_gpgslo=250
set tune_t_minarmem=100
set tune_t_minasmem=250
set msgsys:msginfo_msgmap=256
set msgsys:msginfo_msgmni=100
set msgsys:msginfo_msgtql=80
set msgsys:msginfo_msgseg=3333
set msgsys:msginfo_msgmnb=65535
set shmsys:shminfo_shmmax=436870912
set shmsys:shminfo_shmseg=512
set semsys:seminfo_semmap=512
set semsys:seminfo_semmni=1000
set semsys:seminfo_semmns=4000
set semsys:seminfo_semmnu=800
set semsys:seminfo_semmsl=512
set semsys:seminfo_semume=100
set pln:pln_enable_detach_suspend=1
set soc:soc_enable_detach_suspend=1
set noexec_user_stack=1
set noexec_user_log=1
set shmsys:shminfo_shmmni = 0x1000
10、 配置/opt/informix/etc/sqlhosts文件，包括如下内容（注释省略）:
sct onipcshm sct sqlexec
sct_net ontlitcp sct sqlexec_net
第一项：DBS名称，；
第二项：使用网络协议名称；
第三项：主机名称；
第四项：服务名称；
注意：保证DBS名称不要与其他发生重复。
11、 配置/etc/services文件，在最后两行添加如下内容：
sqlexec 9001/tcp
sqlexec_net 9002/tcp
第一项：服务名称，与/opt/informix/etc/sqlhosts中的服务名称对应；
第二项：端口号；
第三项：协议类型；
注意：保证服务名称不要与其他发生重复。
12、 创建目录/opt/informix/dbs，并将其属主和所属组设置为informix
cd /opt/informix
mkdir dbs
chown informix:informix dbs
13、 创建文件/opt/informix/rootdbs.dat，并将其属主和所属组设置为informix，而且所有人都要有读写权限。
cd /opt/informix/dbs
touch rootdbs.dat
chown informix:informix rootdbs.dat
chmod 666 rootdbs.dat
14、 运行/opt/informix/bin/onmonitor配置数据库参数，也可以使用vi直接修改配置文件/opt/informix/etc/onconfig。需要配置的内容如下红色字体所示：
# Root Dbspace Configuration
ROOTNAME rootdbs # Root dbspace name
ROOTPATH /opt/informix/dbs/rootdbs.dat
# Path for device containing root dbspace
ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes)
ROOTSIZE 200000 # Size of root dbspace (Kbytes)
# Disk Mirroring Configuration Parameters
MIRROR 0 # Mirroring flag (Yes = 1, No = 0)
MIRRORPATH # Path for device containing mirrored root
MIRROROFFSET 0 # Offset into mirrored device (Kbytes)
# Physical Log Configuration
PHYSDBS rootdbs # Location (dbspace) of physical log
PHYSFILE 100000 # Physical log file size (Kbytes)
# Logical Log Configuration
LOGFILES 3 # Number of logical log files
LOGSIZE 20000 # Logical log size (Kbytes)
# Diagnostics
MSGPATH /opt/informix/online.log # System message log file path
CONSOLE /dev/console # System console message path
ALARMPROGRAM /opt/informix/etc/log_full.sh # Alarm program path
SYSALARMPROGRAM /opt/informix/etc/evidence.sh # System Alarm program path
TBLSPACE_STATS 1
# System Archive Tape Device
TAPEDEV /dev/null # Tape device path
TAPEBLK 16 # Tape block size (Kbytes)
TAPESIZE 10240 # Maximum amount of data to put on tape (Kbytes)
# Log Archive Tape Device
LTAPEDEV /dev/null # Log tape device path
LTAPEBLK 16 # Log tape block size (Kbytes)
LTAPESIZE 10240 # Max amount of data to put on log tape (Kbytes)
# Optical
STAGEBLOB # Informix Dynamic Server/Optical staging area
# System Configuration
SERVERNUM 1 # Unique id corresponding to a Dynamic Server instance
DBSERVERNAME sct # Name of default database server
DBSERVERALIASES sct_net # List of alternate dbservernames
DEADLOCK_TIMEOUT 60 # Max time to wait of lock in distributed env.
RESIDENT 0 # Forced residency flag (Yes = 1, No = 0)
MULTIPROCESSOR 0 # 0 for single-processor, 1 for multi-processor
NUMCPUVPS 1 # Number of user (cpu) vps
SINGLE_CPU_VP 0 # If non-zero, limit number of cpu vps to one
NOAGE 0 # Process aging
AFF_SPROC 0 # Affinity start processor
AFF_NPROCS 0 # Affinity number of processors
# Shared Memory Parameters
LOCKS 5000 # Maximum number of locks
BUFFERS 10000 # Maximum number of shared buffers
NUMAIOVPS # Number of IO vps
PHYSBUFF 32 # Physical log buffer size (Kbytes)
LOGBUFF 32 # Logical log buffer size (Kbytes)
LOGSMAX 9 # Maximum number of logical log files
CLEANERS 1 # Number of buffer cleaner processes
SHMBASE 0x1000000 # Shared memory base address
SHMVIRTSIZE 8000 # initial virtual shared memory segment size
SHMADD 8192 # Size of new shared memory segments (Kbytes)
SHMTOTAL 400000 # Total shared memory (Kbytes). 0=>unlimited
CKPTINTVL 300 # Check point interval (in sec)
LRUS 8 # Number of LRU queues
LRU_MAX_DIRTY 60 # LRU percent dirty begin cleaning limit
LRU_MIN_DIRTY 50 # LRU percent dirty end cleaning limit
LTXHWM 50 # Long transaction high water mark percentage
LTXEHWM 60 # Long transaction high water mark (exclusive)
TXTIMEOUT 0x12c # Transaction timeout (in sec)
STACKSIZE 32 # Stack size (Kbytes)
# System Page Size
# BUFFSIZE - Dynamic Server no longer supports this configuration parameter.
# To determine the page size used by Dynamic Server on your platform
# see the last line of output from the command, 'onstat -b'.
# Recovery Variables
# OFF_RECVRY_THREADS:
# Number of parallel worker threads during fast recovery or an offline restore.
# ON_RECVRY_THREADS:
# Number of parallel worker threads during an online restore.
OFF_RECVRY_THREADS 10 # Default number of offline worker threads
ON_RECVRY_THREADS 1 # Default number of online worker threads
# Data Replication Variables
# DRAUTO: 0 manual, 1 retain type, 2 reverse type
DRAUTO 0 # DR automatic switchover
DRINTERVAL 30 # DR max time between DR buffer flushes (in sec)
DRTIMEOUT 30 # DR network timeout (in sec)
DRLOSTFOUND /opt/informix/lost+found # DR lost+found file path
# CDR Variables
CDR_LOGBUFFERS 2048 # size of log reading buffer pool (Kbytes)
CDR_EVALTHREADS 1,2 # evaluator threads (per-cpu-vp,additional)
CDR_DSLOCKWAIT 5 # DS lockwait timeout (seconds)
CDR_QUEUEMEM 4096 # Maximum amount of memory for any CDR queue (Kbytes)
CDR_LOGDELTA 30 # % of log space allowed in queue memory
CDR_NUMCONNECT 16 # Expected connections per server
CDR_NIFRETRY 300 # Connection retry (seconds)
CDR_NIFCOMPRESS 0 # Link level compression (-1 never, 0 none, 9 max)
# Backup/Restore variables
BAR_ACT_LOG /usr/informix/bar_act.log # ON-Bar Log file - not in /tmp please
BAR_DEBUG_LOG /usr/informix/bar_dbug.log
# ON-Bar Debug Log - not in /tmp please
BAR_MAX_BACKUP 0
BAR_RETRY 1
BAR_NB_XPORT_COUNT 10
BAR_XFER_BUF_SIZE 31
# Informix Storage Manager variables
ISM_DATA_POOL ISMData # If the data pool name is changed, be sure to
# update $INFORMIXDIR/bin/onbar. Change to
# ism_catalog -create_bootstrap -pool <new name>
ISM_LOG_POOL ISMLogs
# Read Ahead Variables
RA_PAGES # Number of pages to attempt to read ahead
RA_THRESHOLD # Number of pages left before next group
# DBSPACETEMP:
# Dynamic Server equivalent of DBTEMP for SE. This is the list of dbspaces
# that the Dynamic Server SQL Engine will use to create temp tables etc.
# If specified it must be a colon separated list of dbspaces that exist
# when the Dynamic Server system is brought online. If not specified, or if
# all dbspaces specified are invalid, various ad hoc queries will create
# temporary files in /tmp instead.
DBSPACETEMP # Default temp dbspaces
# DUMP*:
# The following parameters control the type of diagnostics information which
# is preserved when an unanticipated error condition (assertion failure) occurs
# during Dynamic Server operations.
# For DUMPSHMEM, DUMPGCORE and DUMPCORE 1 means Yes, 0 means No.
DUMPDIR /tmp # Preserve diagnostics in this directory
DUMPSHMEM 1 # Dump a copy of shared memory
DUMPGCORE 0 # Dump a core image using 'gcore'
DUMPCORE 0 # Dump a core image (Warning:this aborts Dynamic Server)
DUMPCNT 1 # Number of shared memory or gcore dumps for
# a single user's session
FILLFACTOR 90 # Fill factor for building indexes
# method for Dynamic Server to use when determining current time
USEOSTIME 0 # 0: use internal time(fast), 1: get time from OS(slow)
# Parallel Database Queries (pdq)
MAX_PDQPRIORITY 100 # Maximum allowed pdqpriority
DS_MAX_QUERIES # Maximum number of decision support queries
DS_TOTAL_MEMORY # Decision support memory (Kbytes)
DS_MAX_SCANS 1048576 # Maximum number of decision support scans
DATASKIP off # List of dbspaces to skip
# OPTCOMPIND
# 0 => Nested loop joins will be preferred (where
# possible) over sortmerge joins and hash joins.
# 1 => If the transaction isolation mode is not
# "repeatable read", optimizer behaves as in (2)
# below. Otherwise it behaves as in (0) above.
# 2 => Use costs regardless of the transaction isolation
# mode. Nested loop joins are not necessarily
# preferred. Optimizer bases its decision purely
# on costs.
OPTCOMPIND 2 # To hint the optimizer
ONDBSPACEDOWN 2 # Dbspace down option: 0 = CONTINUE, 1 = ABORT, 2 = WAIT
LBU_PRESERVE 0 # Preserve last log for log backup
OPCACHEMAX 0 # Maximum optical cache size (Kbytes)
# HETERO_COMMIT (Gateway participation in distributed transactions)
# 1 => Heterogeneous Commit is enabled
# 0 (or any other value) => Heterogeneous Commit is disabled
HETERO_COMMIT 0
# Optimization goal: -1 = ALL_ROWS(Default), 0 = FIRST_ROWS
OPT_GOAL -1
# Optimizer DIRECTIVES ON (1/Default) or OFF (0)
DIRECTIVES 1
# Status of restartable restore
RESTARTABLE_RESTORE on
NETTYPE tlitcp,2,20,NET # Configure poll thread(s) for nettype
NETTYPE ipcshm,2,20,CPU # Configure poll thread(s) for nettype
15、 初始化数据库系统；
cd /opt/informix/bin
./oninit –i
16、 重启数据数据系统；
cd /opt/informix/bin
./oninit –ky
./oninit
17、 ok，安装完毕。
18、 使用dbaccess登陆，即可使用。