Oracle Study之-AIX6.1构建Oracle 11gR2 RAC(2)
一、修改系统内核参数
[root@aix209 app]#chdev -l sys0 -a ncargs=256
sys0 changed
[root@aix209 app]#lsattr -El sys0 -a ncargs
ncargs 256 ARG/ENV list size in 4K byte blocks True
[root@aix209 app]#vmo -p -o minperm%=3
Setting minperm% to 3 in nextboot file
Setting minperm% to 3
[root@aix209 app]#vmo -p -o maxperm%=90
Modification to restricted tunable maxperm%, confirmation required yes/no yes
Setting maxperm% to 90 in nextboot file
Setting maxperm% to 90
Warning: a restricted tunable has been modified
[root@aix209 app]#vmo -p -o maxclient%=90
Modification to restricted tunable maxclient%, confirmation required yes/no yes
Setting maxclient% to 90 in nextboot file
Setting maxclient% to 90
Warning: a restricted tunable has been modified
[root@aix209 app]#vmo -p -o lru_file_repage=0
Modification to restricted tunable lru_file_repage, confirmation required yes/no yes
Setting lru_file_repage to 0 in nextboot file
Setting lru_file_repage to 0
Warning: a restricted tunable has been modified
[root@aix209 app]#vmo -p -o strict_maxclient=1
Modification to restricted tunable strict_maxclient, confirmation required yes/no yes
Setting strict_maxclient to 1 in nextboot file
Setting strict_maxclient to 1
Warning: a restricted tunable has been modified
[root@aix209 app]#vmo -p -o strict_maxperm=0
Modification to restricted tunable strict_maxperm, confirmation required yes/no yes
Setting strict_maxperm to 0 in nextboot file
Setting strict_maxperm to 0
Warning: a restricted tunable has been modified
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二、配置系统异步I/O
[root@aix209 /]#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
----- 对于aix 6.1，异步I/O(AIO)系统在有异步I/O需求时自动激活，无需配置。
三、时钟同步配置
ntp:
[root@aix209 /]#smit xntpd
[root@aix209 /]#mv /etc/ntp.conf /etc/ntp.conf.bak
---- 对于Oracle 11g RAC时钟通过通过grid的ctssd进程解决，可以关闭系统的ntp服务
四、配置tcp/udp参数
[root@aix209 /]#lsattr -E -l sys0 -a pre520tune
pre520tune disable Pre-520 tuning compatibility mode True
对于disable compatibility，做以下配置：
[root@aix209 /]#cat mknet.sh
/usr/sbin/no -r -o ipqmaxlen=512
/usr/sbin/no -p -o rfc1323=1
/usr/sbin/no -p -o sb_max=4194304
/usr/sbin/no -p -o tcp_recvspace=65536
/usr/sbin/no -p -o tcp_sendspace=65536
/usr/sbin/no -p -o udp_recvspace=655360
/usr/sbin/no -p -o udp_sendspace=65536
执行，有的参数需要系统重启后生效：
[root@aix209 /]#sh mknet.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 4194304
Setting sb_max to 4194304 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
五、配置共享存储
构建RAC，DataBase是存储在共享存储上（即阵列设备上），由于此次系统使用的是Sun T300的存储阵列，磁盘不支持并发访问，故此次的存储的共享需要配置hacmp加concurrent VG实现；如果阵列支持并发，可直接使用ASM和raw实现存储共享。
[root@aix210 /]#lsdev -c disk
hdisk0 Available 1S-08-00-8,0 16 Bit LVD SCSI Disk Drive
hdisk1 Available 1n-08-02 Other FC SCSI Disk Drive
[root@aix209 /]#lspv
hdisk0 00096b0dc9e3531f rootvg active
hdisk1 000f823ae67f2ef2 None
hdisk2 00096b0dbf3e15be None
[root@aix210 /]#lsattr -El hdisk1
clr_q no Device CLEARS its Queue on error True
location Location Label True
lun_id 0x0 Logical Unit Number ID False
max_transfer 0x40000 Maximum TRANSFER Size True
node_name 0x50020f2000004999 FC Node Name False
pvid 000f823ae67f2ef20000000000000000 Physical volume identifier False
q_err yes Use QERR bit True
q_type simple Queuing TYPE True
queue_depth 1 Queue DEPTH True
reassign_to 120 REASSIGN time out value True
rw_timeout 30 READ/WRITE time out value True
scsi_id 0x10800 SCSI ID False
start_timeout 60 START unit time out value True
ww_name 0x50020f2300004999 FC World Wide Name False
------- hdisk1为阵列共享磁盘，不具有reserve_polic 或reserve_lock属性
配置并发卷组通过HACMP实现共享：
HACMP Install：http://blog.csdn.net/lqx0405/article/details/50883875
并发卷组的配置：http://blog.csdn.net/lqx0405/article/details/51007358
配置HACMP：http://blog.csdn.net/lqx0405/article/details/51007358
六、配置主机间的信任关系
通过ssh配置主机间的信任关系，具体文档见:
http://blog.csdn.net/lqx0405/article/details/51191832
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