Unix Study之--AIX系統構建RAC經過ASM磁盤共享

Unix Study之--AIX系統構建RAC經過ASM磁盤共享

如上圖所示：hdisk0支持reserve_policy，而hdisk1卻不支持reserve_policy。

在AIX系統上，構建ASM磁盤共享的RAC環境，須要設置reserve_policy。

安裝rac要將reserve_lock（reserve_policy）設置成NO或no_reserve，目的是由於RAC 須要 併發的共享盤 ，因此盤不能被一臺機器鎖住

若是不設置說不上何時會出問題。

操做：

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To enable simultaneous access to a disk device from multiple nodes, you must set the appropriate Object Data Manager (ODM) attribute listed in the following table to the value shown, depending on the disk type:

Disk Type Attribute Value
SSA, FAStT, or non-MPIO-capable disks reserve_lock no

ESS, EMC, HDS, CLARiiON, or MPIO-capable disks
reserve_policy no_reserve

To determine whether the attribute has the correct value, enter a command similar to the following on all cluster nodes for each disk device that you want to use:
# /usr/sbin/lsattr -E -l hdiskn
If the required attribute is not set to the correct value on any node, then enter a command similar to one of the following on that node:
■ SSA and FAStT devices
# /usr/sbin/chdev -l hdiskn -a reserve_lock=no
■ ESS, EMC, HDS, CLARiiON, and MPIO-capable devices
# /usr/sbin/chdev -l hdiskn -a reserve_policy=no_reserve
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