Hpux开启和关闭异步IO

开启异步I/O:

 

        # /sbin/mknod  /dev/async c 101 0x000000

        # ls -l /dev/async

        # /usr/bin/chown oracle:dba /dev/async

        # /usr/bin/chmod 660 /dev/async

        # setprivgrp dba RTSCHED RTPRIO MLOCK

        # vi /etc/privgroup 加入以下设置：dba RTSCHED RTPRIO MLOCK

4. 设定KAIO设备相关权限

1) Create the /etc/privgroup file
# touch /etc/privgroup

2) Add the MLOCK privilege to the informix user group
# vi /etc/privgroup
informix MLOCK

3) Use the setprivgrp command to set the new privilege
# setprivgrp -f /etc/privgroup

4) Run the getprivgrp command to verify that the new privilege is in place
# getprivgrp
global privileges: CHOWN
informix: MLOCK