作者： 链接：

在Oracle Linux 6推出来以后，很多用户已经在跃跃欲试。在Linux 6中，ASMLib上有一个变化早已在Metalink上公布。参见Metalink Note 1089399.1。

Oracle指出：

For RHEL6 Oracle will only provide ASMLib software and updates via . Oracle will no longer provide ASMLib packages for Red Hat kernels.

也就是说，在Oracle将仅通过ULN来提供ASMLib，之前通过公众下载的ASMLib将不再可用。Oracle也将不再针对RedHat Kernels提供ASMLib包，虽然ASMLib对于Linux ASM不是必不可少，甚至有很多用户避免去使用它，但是这一变化还是会让很多熟悉ASMLib的用户感到不便。

OEL6据说针对数据库的优化会带来大幅度的，在OLTP性能测试中，同等内核比较，Oracle Linux Kernel会带来75%的性能提升：

Fast:

More than 75 percent performance gain demonstrated in OLTP performance tests over a Red Hat Compatible Kernel; 200 percent speedup of Infiniband messaging; 137 percent faster solid state disk access.

Modern: Pro vides optimizations for large NUMA servers; improved power management and energy efficiency; fine grained CPU and memory resource control.

Reliable: Supports the Data Integrity Extensions and T10 Protection Information Model, to stop corrupt data from being written to storage; hardware fault management enables improved application uptime; low overhead performance counters for tracing.

Optimized for Oracle:

Built and tested to run Oracle hardware, databases, and middleware with the best Linux performance and reliability available.

看来Oracle将不遗余力的将Linux用户吸引到Oracle Linux上来。

 

asmlib不是必须的，也可以直接在asm实例里添加裸设备。