Oracle Study之-AIX6.1构建Oracle 10gR2 RAC(2)
一、查看系统I/O(对于Oracle数据库需启用异步I/O)
对于AIX6.1，默认异步I/O在有需求时，自动被激活，不需要配置。
[root@aix203 /]#ioo -a |grep aio
aio_active = 0
aio_maxreqs = 65536
aio_maxservers = 30
aio_minservers = 3
aio_server_inactivity = 300
posix_aio_active = 0
posix_aio_maxreqs = 65536
posix_aio_maxservers = 30
posix_aio_minservers = 3
posix_aio_server_inactivity = 300二、配置节点间的主机信任关系：
[root@aix203 /]#cat /etc/hosts.equiv
aix203 root
aix204 root
aix203-vip root
aix204-vip root
aix203-priv root
aix204-priv root
aix203 oracle
aix204 oracle
aix203-vip oracle
aix204-vip oracle
aix203-priv oracle
aix204-priv oracle
[root@aix203 /]#cat .rhosts
aix203 root
aix204 root
aix203-vip root
aix204-vip root
aix203-priv root
aix204-priv root
aix203 oracle
aix204 oracle
aix203-vip oracle
aix204-vip oracle
aix203-priv oracle
aix204-priv oracle
[oracle@aix203 ~]$cat .rhosts
aix203 root
aix204 root
aix203-vip root
aix204-vip root
aix203-priv root
aix204-priv root
aix203 oracle
aix204 oracle
aix203-vip oracle
aix204-vip oracle
aix203-priv oracle
aix204-priv oracle验证主机信任关系：
[oracle@aix203 ~]$rsh aix204 date
Tue Mar 15 16:18:47 CDT 2016
[oracle@aix203 ~]$rsh aix204-priv date
Tue Mar 15 16:18:50 CDT 2016
[oracle@aix204 ~]$rsh aix203 date
Tue Mar 15 16:17:12 CDT 2016
[oracle@aix204 ~]$rsh aix203-priv date
Tue Mar 15 16:18:26 CDT 2016
三、配置时间同步（NTP)
NTP SERVER：
[root@aix203 /]#cat /etc/ntp.conf
# Default NTP configuration file.
# Broadcast client, no authentication.
broadcastclient
driftfile /etc/ntp.drift
tracefile /etc/ntp.trace
server 127.127.1.0
NTP CLIENT:
[root@aix204 /]#cat /etc/ntp.conf
# Default NTP configuration file.
#
# Broadcast client, no authentication.
#
#broadcastclient
driftfile /etc/ntp.drift
tracefile /etc/ntp.trace
server 192.168.8.203
启动ntp services：
[root@aix203 /]#smit xntpd ；；启动ntp service
[root@aix203 /]#l***c -ls xntpd
Program name: /usr/sbin/xntpd
Version: 3
Leap indicator: 11 (Leap indicator is insane.)
Sys peer: no peer, system is insane
Sys stratum: 16
Sys precision: -17
Debug/Tracing: DISABLED
Root distance: 0.000000
Root dispersion: 0.000000
Reference ID: no refid, system is insane
Reference time: no reftime, system is insane
Broadcast delay: 0.003906 (sec)
Auth delay: 0.000122 (sec)
System flags: bclient pll monitor filegen
System uptime: 5 (sec)
Clock stability: 0.000000 (sec)
Clock frequency: 0.000000 (sec)
Peer: 127.127.1.0
flags: (configured)(refclock)
stratum: 3, version: 3
our mode: client, his mode: server
Subsystem Group PID Status
xntpd tcpip 3604550 active四、配置node间私有网络传输参数
[root@aix203 /]#lsattr -El sys0 -a pre520tune
pre520tune disable Pre-520 tuning compatibility mode True
[root@aix203 /]#no -a |grep tcp
hstcp = 0
tcp_bad_port_limit = 0
tcp_cwnd_modified = 0
tcp_ecn = 0
tcp_ephemeral_high = 65535
tcp_ephemeral_low = 32768
tcp_fastlo = 0
tcp_fastlo_crosswpar = 0
tcp_finwait2 = 1200
tcp_icmpsecure = 0
tcp_init_window = 0
tcp_inpcb_hashtab_siz = 24499
tcp_keepcnt = 8
tcp_keepidle = 14400
tcp_keepinit = 150
tcp_keepintvl = 150
tcp_limited_transmit = 1
tcp_low_rto = 0
tcp_maxburst = 0
tcp_mssdflt = 1460
tcp_nagle_limit = 65535
tcp_nagleoverride = 0
tcp_ndebug = 100
tcp_newreno = 1
tcp_nodelayack = 0
tcp_pmtu_discover = 1
tcp_recvspace = 16384
tcp_sendspace = 16384
tcp_tcpsecure = 0
tcp_timewait = 1
tcp_ttl = 60
tcprexmtthresh = 3
tcptr_enable = 0[root@aix203 /]#no -a |grep udp
udp_bad_port_limit = 0
udp_ephemeral_high = 65535
udp_ephemeral_low = 32768
udp_inpcb_hashtab_siz = 24499
udp_pmtu_discover = 1
udp_recvspace = 42080
udp_sendspace = 9216
udp_ttl = 30
udpcksum = 1配置脚本：
[root@aix203 /]#cat chnet.sh
no -r -o ipqmaxlen=512
no -p -o rfc1323=1
no -p -o sb_max=1310720
no -p -o tcp_recvspace=65536
no -p -o tcp_sendspace=65536
no -p -o udp_recvspace=655360
no -p -o udp_sendspace=65536
[root@aix203 /]#sh chnet.sh
Setting ipqmaxlen to 512 in nextboot file
Warning: changes will take effect only at next reboot
Setting rfc1323 to 1
Setting rfc1323 to 1 in nextboot file
Change to tunable rfc1323, will only be effective for future connections
Setting sb_max to 1310720
Setting sb_max to 1310720 in nextboot file
Setting tcp_recvspace to 65536
Setting tcp_recvspace to 65536 in nextboot file
Change to tunable tcp_recvspace, will only be effective for future connections
Setting tcp_sendspace to 65536
Setting tcp_sendspace to 65536 in nextboot file
Change to tunable tcp_sendspace, will only be effective for future connections
Setting udp_recvspace to 655360
Setting udp_recvspace to 655360 in nextboot file
Change to tunable udp_recvspace, will only be effective for future connections
Setting udp_sendspace to 65536
Setting udp_sendspace to 65536 in nextboot file
Change to tunable udp_sendspace, will only be effective for future connections------ 未完，待续 ！
