On x86 and Itanium systems, although Red Hat Enterprise Linux 3 and SUSE Linux Enterprise Server provide a Logical Volume Manager (LVM), this LVM is not cluster-aware. For this reason, Oracle does not support the use of logical volumes with RAC on x86 and Itanium systems for either Oracle Clusterware or database files.
On IBM zSeries based systems, Oracle supports raw logical volumes.
LVM is not cluster aware
Be very careful doing this, LVM is not currently cluster-aware and it is very easy to lose all your data.
AlthoughRed Hat Enterprise Linux 3.0 and SLES 8 provide a Logical Volume Manager (LVM),this LVM is not cluster aware. For this reason, Oracle does not support the useof logical volumes with RAC for either CRS or database files on Linux. The useof logical volumes for raw devices is supported only for single-instancedatabases. They are not supported for RAC databases.
http://www.itpub.net/thread-634625-4-1.html
http://xzh2000.itpub.net/post/96/211690
http://tldp.org/HOWTO/LVM-HOWTO/sharinglvm1.html
查了一些信息,LV 到底是不支持做RAC呢?还是仅仅是不受厂商支持呢?
对于那些已经采用这种方式做RAC的环境,到底会存在什么隐患呢?
如果用户只是在安装时采用这种方式,生产时并不会对LV、RAW做任何改变,是否就没有问题呢?
[ 本帖最后由 武汉-SSH 于 2012-3-13 23:56 编辑 ] |